Grade 11 Lesson plan
Sable Crossing's Growth: Timing a Treatment Plant Expansion
A grade 11 lesson where students model a fictional town's maximum-day water demand exponentially and use logarithms to time a treatment plant expansion.
Common Core Math · High School
HSN-Q.A.1 Use units to guide multi-step problem solving
Use units as a way to understand problems and to guide the solution of multi-step problems; choose and interpret units consistently in formulas; choose and interpret the scale and the origin in graphs and data displays.
Why water teaches this standard well
Students carry units through a multi-step water-budget calculation that converts acre-feet to gallons and then to million gallons per day when sizing a reservoir for a growing city. Choosing consistent units and a sensible graph scale here is the same dimensional-analysis discipline operator-certification exams demand.
Materials tagged with this code are written to the full standard , and each carries a written note explaining the alignment. See how we review materials.
458 materials aligned to HSN-Q.A.1
Lesson plans
Grade 11 Lesson plan
Sedgemount Orchards' Two Wells: Rational Equations for Fill Time
A 50-minute grade 11 lesson where students write and solve rational equations for the time two wells need to fill an irrigation pond, then add a leak to the model.
Grade 12 Lesson plan
Bramleigh Hydrant Flow Test: Flow as a Square-Root Model
A 55-minute grade 12 math lesson in which students model hydrant discharge as a square-root function of pitot pressure and rate a loop against a needed fire flow.
Grade 9 Lesson plan
Feldmere's Pennyquick Lane Main: Building an Exponential Decay Model
A 50-minute grade 9 lesson where students build an exponential model of chlorine residual along a dead-end water main and compare it against a linear guess.
Grade 10 Lesson plan
Aldenbury's Aquifer Storage and Recovery Wells
A 55-minute grade 10 lesson on storing treated water underground, where students calculate injected volume, recovery efficiency, and chloride in the recovered blend.
Grade 11 Lesson plan
Why the Denholt Pump Cavitates: Vapor Pressure and Lift
A grade 11 lesson using a syringe demonstration and a fictional pump station record to explain cavitation as boiling at reduced pressure, with head math.
Grade 11 Lesson plan
Yarnbrook Farms' Salty Root Zone: A Salt Balance Lesson
A grade 11 lesson on why irrigation concentrates salt in soil, using a fictional farm water budget to find leaching fraction, drainage salinity, and salt load.
Grade 12 Lesson plan
Turnover and Intake Depth at Calderhurst Reservoir
A 60-minute grade 12 lesson using a calorimeter mixing investigation and energy balance to explain reservoir stratification and choose an intake blend.
Grade 9 Lesson plan
Ravenscarr's Wells and Ellinmere Brook: Where Baseflow Goes
A 55-minute grade 9 lesson where students convert well pumping rates to stream units and trace how pumping a shallow aquifer lowers a brook's late-summer flow.
Grade 9 Lesson plan
Crowhaven's Storm Sewer Map: Where Past Spending Went
A grade 9 lesson in which students shade two district maps of a fictional city and find that the districts with the oldest storm sewers received the least investment.
Grade 11 Lesson plan
Writing Vardenmill's Discharge Permit for Ockridge Creek
A 60-minute grade 11 careers lesson in which students act as a state permit writer, converting effluent limits to loads and testing them against a creek at low flow.
Grade 12 Lesson plan
Threlwood Activated Sludge: Settling Data for a Lab Analyst
Students work as wastewater lab analysts, calculating sludge volume index for two aeration basins and comparing the center and spread of a week of readings.
Grade 12 Lesson plan
Wrentmere Corrosion Control: A Water Quality Specialist Lesson
Students take the role of a corrosion control specialist, calculating orthophosphate feed, reporting pH to meter precision, and ranking lead tap samples.
Grade 10 Lesson plan
Dovegate Cast-Iron Mains: Pipe Lining or Open-Cut Replacement
A grade 10 lesson comparing cured-in-place lining with open-cut replacement for a fictional town's 1920s water mains, using annualized cost and a break-even price.
Grade 10 Lesson plan
Pinewattle Flats Aquifer Storage and Recovery Feasibility
A grade 10 lesson sizing an aquifer storage and recovery scheme for a fictional town, from winter surplus and recovery efficiency to the number of injection wells.
Grade 10 Lesson plan
Wrapping the Selkirk Water Tower: A Grade 10 Surface-Area Design
A grade 10 art and design lesson where students size a painted graphic wrap for a cylindrical water tower using lateral surface area and a scale mock-up.
Grade 10 Lesson plan
Verwood Treatment Plant Infographic: A Grade 10 Scale-Design Lesson
A grade 10 art lesson where students design a scale infographic of a fictional water treatment plant, building the layout as a ratio drawing with labeled call-outs.
Grade 11 Lesson plan
Ardenmoor Well Hydrographs: A Small-Multiples Design Lesson
Grade 11 students lay out six monitoring-well hydrographs as a small-multiples panel grid, sizing panels and setting one shared depth axis.
Grade 11 Lesson plan
Millbrook Boil-Water Notice: Typographic Hierarchy
Grade 11 students set a boil-water notice for a fictional water district, sizing headline and body type and testing the column measure against the page.
Grade 9 Lesson plan
Sable Harbor Desalination Energy: A Grade 9 Infographic Lesson
Grade 9 art students design a one-page infographic comparing desalination and conventional treatment energy, choosing an honest scale, origin, and visual hierarchy.
Grade 10 Lesson plan
Cost of Service: A Day as a Utility Rate Analyst
A grade 10 careers lesson where students act as rate analysts for the fictional Harbor Point utility, building a water rate and testing a bill against affordability.
Grade 10 Lesson plan
Sizing a Chlorine Contact Tank: An Operator Math Lesson
A 50-minute grade 10 careers lesson where students take the operator's role at the fictional Maple Glen plant to compute basin volume, detention time, and chlorine feed.
Grade 12 Lesson plan
Comparing Water-Career Training Paths by Cost and Pay
A grade 12 careers lesson where students compute the cost, length, and first-year pay of three water-sector training paths and reason about the tradeoffs.
Grade 10 Lesson plan
Alderfen PFAS Monitoring Plan: A Grade 10 Design Lesson
A 50-minute grade 10 engineering lesson where students set criteria for a PFAS sampling plan and convert and average trace results against the 4.0 ppt limit.
Grade 10 Lesson plan
Ferris Landing Lead Line Program: A Grade 10 Design Lesson
A 55-minute grade 10 lesson where students break a lead service line replacement program into stages and calculate the yearly pace and cost to meet a 10-year deadline.
Grade 11 Lesson plan
Aldermoor Corrosion Control: Choosing a Lead-Reduction Treatment
A grade 11 engineering lesson where students weigh corrosion-control options for a lead exceedance and compute an orthophosphate feed rate with the pounds formula.
Grade 11 Lesson plan
Sundale Farm Irrigation: Comparing Sprinkler and Drip Efficiency
A grade 11 engineering lesson where students compare sprinkler and drip irrigation efficiency for a drought-hit farm and compute the pumped flow each system needs.
Grade 12 Lesson plan
Water Age in the Quintrell Ridge Tank: A Turnover Lesson
A grade 12 lesson where students compute water age in a fictional storage tank from volume and daily throughput, then weigh storage size against disinfectant residual.
Grade 12 Lesson plan
Umberfield Sewer Inflow and Infiltration: A Wet-Weather Lesson
A grade 12 lesson where students compare dry- and wet-weather flows at a fictional wastewater plant, quantify inflow and infiltration, and price the extra treatment.
Grade 9 Lesson plan
Ambleside Dam Retrofit: Sizing a Micro-Hydropower Turbine
A grade 9 lesson where students estimate the power, yearly energy, and value of adding a small turbine to a fictional existing dam, then judge the retrofit.
Grade 9 Lesson plan
Drummhill Well 2: Criteria, Constraints, and Filter Sizing
A 55-minute grade 9 lesson where students separate criteria from constraints for a fictional town's iron and manganese well, then size the filter vessels it needs.
Grade 9 Lesson plan
Ledgewater Water Loss Audit: Non-Revenue Water and Payback
A grade 9 lesson where students run a water balance for a fictional utility, find non-revenue water, and test whether a leak-detection program pays for itself.
Grade 10 Lesson plan
The Alvarado Family's Tiered Water Bill and the Affordability Line
A grade 10 consumer-math lesson: students compute a fictional household's tiered water and sewer bill, then test it against a widely used 4.5% affordability threshold.
Grade 10 Lesson plan
First-Draw vs Flushed: Reading a Home Tap Lead Test
A grade 10 health lesson where students interpret a fictional home's first-draw and flushed lead results against the 15 ppb action level and the 10 ppb 2027 level.
Grade 10 Lesson plan
Carbon Pitcher or Reverse Osmosis? A Home Filter Cost Decision
A grade 10 consumer lesson comparing a fictional home's carbon pitcher and reverse-osmosis costs, the break-even point against bottled water, and a filtered PFAS result.
Grade 11 Lesson plan
Reading the Marsh Hollow Water Report: Chlorine and pH
A grade 11 health lesson where students read a fictional water district's quality report and check its chlorine residual and pH against federal limits.
Grade 11 Lesson plan
Auditing the Escalante Family's Tiered Water Bill in Otterbrook
A grade 11 lesson where students audit a fictional family's tiered water bill, find cost per thousand gallons, and test it against a widely used affordability threshold.
Grade 11 Lesson plan
Choosing a PFAS Filter for the Novak Household in Verde Mesa
A grade 11 health lesson where students weigh a PFAS filter for a fictional household, comparing tap readings to the 4.0 ppt federal limit and two filters' yearly costs.
Grade 9 Lesson plan
The Marwick Household Water Audit: A Grade 9 Home-Use Model Lesson
Students build and graph an equation for a fictional family's daily water use, then test which single change saves the most water at home.
Grade 9 Lesson plan
Should the Sattlers Buy a Reverse-Osmosis System? A Cost Lesson
Grade 9 consumer-science lesson comparing the per-gallon cost of a pitcher filter, an under-sink reverse-osmosis system, and bottled water for a family.
Grade 10 Lesson plan
Brookfield Crossing Stormwater Runoff Rational Method Lesson
A 50-minute grade 10 lesson using the rational method to compare peak runoff before and after paving a fictional site, then sizing a detention basin's release.
Grade 10 Lesson plan
Emberton's Non-Revenue Water: Loss, Cost, and Payback
A grade 10 math lesson where students turn a fictional utility's unbilled water into a loss percent, an annual dollar figure, and a leak-program payback.
Grade 10 Lesson plan
Harrowgate Chlorine Dose and Contact Time Lesson
A 50-minute grade 10 lesson on chlorine chemistry: students find feed rate with the pounds formula, compute the demand, and find detention time for a fictional plant.
Grade 10 Lesson plan
Highgrove Plant Alum Dose: Feed Rate and Chemical Cost
A grade 10 math lesson using the pounds formula to find a fictional plant's alum feed rate in pounds per day, then its daily and yearly chemical cost.
Grade 10 Lesson plan
Thrapston School Flushing: Pipe Volume Before a Lead Sample
A 50-minute grade 10 lesson where students model school plumbing as cylinders to find how many gallons stand in the pipes and how long a flush must run.
Grade 11 Lesson plan
Brackenford Water Bills: Is the Rate Affordable?
A 50-minute grade 11 math lesson where students compute water-bill burden as a percent of income, compare it to a common 4.5% threshold, and project a rate increase.
Grade 11 Lesson plan
Sundale Reservoir PFAS: Making Sense of Parts Per Trillion
A 45-minute grade 11 math lesson using scientific notation to convert PFAS units, find the mass in a fictional reservoir, and compare readings to the federal limit.
Grade 11 Lesson plan
Water Operator Exam Math: Chlorine Dose and the Career Path
A grade 11 lesson pairing the certification-exam pounds formula for chlorine feed with water-sector career paths and operator wage data, set at a fictional plant.
Grade 11 Lesson plan
Wrenfield Development Runoff: Rational Method Design Lesson
A grade 11 lesson using the rational method to compare pre- and post-development peak runoff for a fictional site and design green infrastructure to a limit.
Grade 12 Lesson plan
Cresthaven Water Plant: CT Values and Disinfection Targets
A 55-minute grade 12 lesson where students compute CT values from contact time and chlorine residual at a fictional water plant.
Grade 12 Lesson plan
Haleboro's Aging Mains: Replacement Rate and Backlog
A grade 12 lesson where students compute a water system pipe replacement rate, cycle, funding gap, and backlog, then link the results to an infrastructure grade.
Grade 9 Lesson plan
Delford's Two Wells: A PFAS Blending Equation Lesson
A grade 9 lesson where students write and solve a weighted-average blending equation to keep two fictional wells at or below the 4.0 ppt PFOA limit.
Grade 9 Lesson plan
Halcyon Ridge Stormwater: A Rational-Method Runoff Lesson
A 50-minute grade 9 lesson where students use the rational method Q = C i A to compare runoff from pavement and lawn at Halcyon Ridge and size a rain garden.
Grade 9 Lesson plan
Ravensford Chlorine Dosing: The Pounds Formula in Action
A 45-minute grade 9 lesson at the fictional Ravensford plant, using the pounds formula and demand-plus-residual to find a chlorine dose and daily feed rate.
Grade 9 Lesson plan
Ridgeport Pump Station: Total Dynamic Head and Pressure
A grade 9 lesson where students add static lift and friction to find total dynamic head, then convert between feet of head and psi for a fictional pump station.
Grade 9 Lesson plan
Westmere Reverse Osmosis: Modeling Recovery Rate
A 50-minute grade 9 lesson at the fictional Westmere plant, modeling reverse-osmosis recovery rate as permeate over feed and solving for a required feed flow.
Grade 10 Lesson plan
Longmeadow Watershed: How Long Water Stays in Each Reservoir
A 50-minute grade 10 lesson where students calculate residence time by dividing stored water by throughflow and compare reservoirs across the water cycle.
Grade 10 Lesson plan
Nettleton Plant Breakpoint Chlorination: Reading the Curve
A 50-minute grade 10 chemistry lesson where students read a breakpoint chlorination curve, calculate chlorine demand, and find the dose for a target residual.
Grade 10 Lesson plan
Rilbeck's Partial Lead Line Replacements: A Corrosion Lesson
A grade 10 lesson on why cutting out only part of a lead service line can raise tap lead, using sequential sampling data from two homes to evaluate a utility's policy.
Grade 10 Lesson plan
Sterling Junction's Aging Water Mains: Evaluating a Fix
A 50-minute grade 10 lesson where students use break rates and costs to evaluate a fictional town's water main replacement plan against reliability trade-offs.
Grade 11 Lesson plan
Rendon's Lead Service Lines: Corrosion Control and the Action Level
A grade 11 science lesson on why corrosive water leaches lead, how corrosion control coats pipes, and how the 90th-percentile action level drives replacement.
Grade 11 Lesson plan
Microplastics in the Tessel River: Counting Fibers at Steadmere
A grade 11 lesson pairing a salt-water density separation demonstration with effluent particle counts to estimate a plant's daily microplastic load and compare two fixes.
Grade 11 Lesson plan
Verrin Valley Irrigation: Crop Water Demand and Efficiency
A 50-minute grade 11 lesson computing a fictional farm's crop water need and comparing flood and drip irrigation efficiency to find the water saved.
Grade 12 Lesson plan
Cross-Connection Control and Backflow at Ashbury School
A grade 12 science lesson on how pressure loss lets contaminated water enter a distribution main, with handout problems converting feet of head to psi.
Grade 12 Lesson plan
Green Infrastructure for the Ellersby Creek Watershed
A grade 12 lesson using the rational method to compare pre- and post-development runoff and to size a rain garden for a fictional campus roof's first flush.
Grade 12 Lesson plan
Granular Activated Carbon for PFAS at Fenwick Wells
A grade 12 science lesson where students size granular activated carbon treatment for a fictional PFAS-affected wellfield and evaluate ways to extend the carbon's life.
Grade 12 Lesson plan
Darcy's Law and the Merrifield Aquifer
A 50-minute grade 12 lesson using Darcy's law to compute groundwater flow, seepage velocity, and contaminant travel time for a fictional town's confined aquifer.
Grade 12 Lesson plan
Corrosion Control at Rothbury: pH, Alkalinity, and Lime Dosing
A 55-minute grade 12 lesson on corrosion control: students calculate lime feed rates and explain how raising pH and alkalinity keeps lead and copper out of tap water.
Grade 12 Lesson plan
The Sablefield Polishing Wetland: Loading and Nitrogen Removal
A grade 12 science lesson on treatment wetlands, with handout problems on hydraulic loading rate, areal nitrogen loading, detention time, and removal efficiency.
Grade 12 Lesson plan
Tamarack Basin Drought Model: A Reservoir Water-Budget Lesson
A 55-minute grade 12 lesson where students build a spreadsheet water-budget model of a fictional reservoir and test how conservation extends the days of supply.
Grade 12 Lesson plan
Irrigation Efficiency and Water Savings in Verrand Valley
A 50-minute grade 12 science lesson where students convert irrigation depth to acre-feet and gallons and compare the water a fictional farm saves by switching to drip.
Grade 9 Lesson plan
Tiered Water Rates in Braemoor: A Grade 9 Conservation Lesson
A 50-minute grade 9 lesson where students compute household bills under an increasing-block water rate and analyze how tiered pricing rewards conservation.
Grade 9 Lesson plan
Halesworth Farms: Crop Water Footprints and Irrigation Efficiency
A 50-minute grade 9 lesson where students compare the water footprint of crops and the efficiency of flood versus drip irrigation on a fictional valley farm.
Grade 9 Lesson plan
Selby's Water Reclamation Plant: BOD Removal by Microbes
A 50-minute grade 9 lesson where students calculate biochemical oxygen demand removal at a fictional plant and link microbial treatment to a healthy river.
Grade 9 Lesson plan
Tamarack Basin Water Budget: Inflow, Storage, and Loss
A 50-minute grade 9 Earth-science lesson where students build a one-year reservoir water budget for a fictional basin and calculate how storage and residence time change.
Grade 9 Lesson plan
Quarry Hill Morning Rounds: An Operator Reads the Daily Log
A 50-minute grade 9 careers lesson where students act as an operator trainee, converting a plant's flow and checking daily readings against real regulatory limits.
Grade 10 Lesson plan
Osprey Flats Secondary Treatment: A Wastewater Design Lesson
A 55-minute grade 10 engineering lesson: students split a wastewater plant into stages and find the removal efficiency needed to meet the secondary standard.
Grade 10 Lesson plan
Tanager Ridge Parking Lot Runoff: A Bioretention Design Lesson
A 55-minute grade 10 engineering lesson where students calculate parking-lot runoff and size a bioretention cell to capture it within a fixed footprint.
Grade 12 Lesson plan
Dunmore Reclamation Facility: BOD Removal Efficiency and Loading
A 50-minute grade 12 engineering lesson where students calculate BOD removal efficiency and pounds-per-day loading for a fictional secondary wastewater plant.
Grade 12 Lesson plan
Sizing a Stormwater Basin for Perch Hollow High: The Rational Method
A 55-minute grade 12 engineering lesson where students use the Rational Method to compare pre- and post-development runoff for a fictional paved lot and size detention.
Grade 9 Lesson plan
Sizing a Parking Lot Bioretention Cell by the Rational Method
A 55-minute grade 9 engineering lesson where students use the rational method to find parking lot runoff, compare it with lawn, and size a bioretention cell.
Grade 12 Lesson plan
Marlowe Ferry's Main Replacement: Rate Surcharge or Revenue Bond
A grade 12 lesson where students compute and compare a pay-as-you-go rate surcharge and a revenue-bond surcharge to fund a fictional utility's capital program.
Grade 10 Lesson plan
Millhollow Sedimentation Basin: Volume and Detention Time Lesson
A grade 10 lesson where students find a sedimentation basin's volume, convert it to gallons, and use the detention-time formula to size a treatment plant's flow rate.
Grade 9 Lesson plan
Windrow Creek's Watershed: Modeling Runoff After Development
A grade 9 Earth science lesson where students use the rational method to compare peak stormwater runoff before and after development in a fictional watershed.
Grade 12 Lesson plan
Designing an Accessible Water Quality Report: A Grade 12 Lesson
A grade 12 lesson where students translate real water-quality thresholds into an accessible infographic for a fictional utility, applying design and precision choices.
Grade 9 Lesson plan
Reading Your Water Quality Report: A Grade 9 Consumer Science Lesson
A grade 9 lesson teaching students to interpret a home water quality report, comparing contaminant levels, units, and percent of regulatory action levels.
Worksheets
Grade 10 Worksheet
Cedar Hollow's Water Report: Calculating the Summary Numbers
A grade 10 worksheet in which students rebuild a fictional town's water report from raw lead, chlorine and turbidity data, then judge each result by its rule.
Grade 12 Worksheet
Carrowmoor Canal Danger Sign: Pictograms, Panels, and Letter Size
Grade 12 students design a bilingual danger sign for a fictional irrigation canal, choosing signal word, pictogram, and type treatment and sizing letters for distance.
Grade 12 Worksheet
Orrin Gap Main Profile Poster: Choosing a Vertical Exaggeration
Grade 12 students set scales for a fictional pipeline profile poster, find vertical exaggeration and pressure head, and design how the hydraulic grade line reads.
Grade 9 Worksheet
Stoneharrow Resource Recovery: A Biosolids Technician's Log
A grade 9 careers worksheet where students complete a fictional facility's biosolids log: dry tons, hauling, nitrogen application acres, and permit recordkeeping.
Grade 11 Worksheet
Morwenna Creek at Westhorpe: Recurrence Intervals and Flood Odds
A grade 11 worksheet that ranks ten annual peak flows, computes recurrence intervals and exceedance probabilities, and builds an exponential ten-year risk function.
Grade 11 Worksheet
Rodmell's Digester Blend: Solving a Two-Stream Solids Balance
A grade 11 worksheet solving a system of two linear equations for the blend of thickened and primary sludge a digester needs, then checking solids in pounds per day.
Grade 12 Worksheet
Aspenmill Dam Releases: A Piecewise Rule and Its Domain
A grade 12 worksheet where students evaluate and invert a three-branch piecewise release rule for a dam, state its domain, and convert cfs into acre-feet.
Grade 12 Worksheet
Kirtlebeck Well 4 Pump Test: Drawdown per Log Cycle
A grade 12 worksheet in which students fit a semi-log drawdown model to a pumping test record, predict later drawdown, and judge an extrapolation.
Grade 12 Worksheet
Windlestraw Creek Phosphorus: Allocating a Load Reduction
A grade 12 worksheet where students compute four phosphorus loads with the pounds formula, then solve for the percent reduction two sources must share.
Grade 9 Worksheet
Farnhollow Digester Biogas: Volume, Detention Time, and Energy
A grade 9 worksheet on a wastewater plant's anaerobic digester: cylinder volume, detention time, solids loading, and the electricity its biogas engine makes.
Grade 9 Worksheet
Quarrylea Dam Spillway: Reading a Head and Discharge Table
A grade 9 worksheet where students read a spillway rating table, compute rates of change across intervals, and convert discharge between cfs, MGD, and gpm.
Grade 9 Worksheet
The 1873 Cravenhurst Outbreak: Mapping a Water Supply
A grade 9 worksheet in which students turn ward case counts from a fictional 1873 outbreak into rates and judge what the health officer's map revealed.
Grade 9 Worksheet
Annexation or Wells: The Pikeworth Hollow Water Extension
A grade 9 worksheet costing out a fictional city water main extension and weighing the annexation condition the city attaches to the offer.
Grade 11 Worksheet
Corbenwood Corrosion Control: Orthophosphate Feed and Lead Results
A grade 11 careers worksheet in which a water quality chemist sets an orthophosphate feed rate in pounds, gallons, and mL per minute, then ranks 20 lead sample results.
Grade 11 Worksheet
Shalecombe Creek Stream Gauging: A Field Technician Worksheet
A grade 11 careers worksheet in which a watershed technician gauges a creek by the mid-section method, totals discharge, and converts it to gpm, MGD, and a daily volume.
Grade 12 Worksheet
Marchbourne Creek Spill Response: Coordinator Field Math
Grade 12 worksheet using stream velocity, travel time, and the pounds formula to judge how a fertilizer spill affects a fictional town's drinking water intake.
Grade 12 Worksheet
Redlaw Flats Irrigation District: A Ditch Rider's Delivery Math
Grade 12 worksheet converting canal flow among cfs, gpm, MGD, and acre-feet per day, then sizing farm water orders and delivery times for a fictional district.
Grade 9 Worksheet
Kilnworth Operator Licensing: A Grade 9 Careers Worksheet
A grade 9 careers worksheet where students apply a state board's operator licensing rules: plant class, creditable experience, contact hours, and the exam deadline.
Grade 10 Worksheet
Pennyford Sanitary Sewer: Inflow and Infiltration Math
A grade 10 worksheet measuring storm water leaking into a fictional town's sanitary sewer, then pricing the extra treatment and testing what a lining project would fix.
Grade 11 Worksheet
Rensford Falls Clearwell: A Chlorine CT Compliance Worksheet
A grade 11 worksheet on disinfection contact time: students size a clearwell, apply a baffling factor, compute CT achieved, and solve for a passing residual.
Grade 12 Worksheet
Calverhoe Chloramine Conversion: Feed Rate and Ratio Worksheet
A grade 12 worksheet on a fictional district switching to chloramines: feed rates in pounds per day, the chlorine to ammonia ratio, and nitrification signs.
Grade 12 Worksheet
Nashmere High School Cistern Sizing and Payback Worksheet
A grade 12 worksheet sizing a rainwater cistern for a fictional school roof, from design-storm runoff and first flush to tank depth and simple payback.
Grade 9 Worksheet
Granite Ridge Transmission Main: Material and Pressure Class
A grade 9 engineering worksheet where students screen three pipe options for a transmission main against ranked requirements for pressure, schedule, and cost per year.
Grade 10 Worksheet
Morrowfen Lime Softening: Dose, Cost, and Sludge Worksheet
A grade 10 worksheet on a fictional softening plant: hardness removal, quicklime dose in pounds per day, purity correction, chemical cost, and sludge production.
Grade 11 Worksheet
Glenmark Bend Plant Residuals: Solids Loading and Drying Beds
A grade 11 worksheet on water plant residuals: students find solids loading with the pounds formula, size a drying bed, and compare hauling costs before and after drying.
Grade 10 Worksheet
Stonehaven Wellfield and Ledger Creek: Testing Two Explanations
A grade 10 science worksheet where students weigh monitoring-well and stream gauge records to decide whether a fictional town's wellfield or a drought drained a creek.
Grade 10 Worksheet
Reading Merribow's Annual Water Quality Report
A grade 10 worksheet on a fictional district's annual water quality report, where students convert between ppm, ppb, and ppt and compare results to limits.
Grade 10 Worksheet
Snowpack and the Tumbleway Reservoir Flood Rule
A grade 10 worksheet using five years of snowpack and runoff data from a fictional basin to test a reservoir's flood rule against a drought shortfall.
Grade 9 Worksheet
Kirkbourne's Biosolids Ordinance: A Nutrient Loading Worksheet
A grade 9 worksheet using the pounds formula to test whether a fictional town's proposed setback ordinance would end land application of treated biosolids.
Grade 9 Worksheet
Loamside's Data Center Water Agreement: A Capacity Worksheet
A grade 9 worksheet in which students convert plant capacity units, test a fictional town's remaining growth room, and price a data center's water contract.
Grade 10 Worksheet
Kettleworth PFAS Notice Layout: Grade 10 Type-Scale Worksheet
A grade 10 design worksheet where students lay out a fictional water system's PFAS public notice, building a modular type scale and a column grid with real measurements.
Grade 10 Worksheet
Ondine Creek Turbidity Chart: Grade 10 Honest Data-Design Worksheet
A grade 10 design worksheet where students build an honest bar chart from a fictional lab's turbidity readings, setting axis origin, scale, and reporting precision.
Grade 10 Worksheet
Sedgwick Find-the-Leak Poster: Grade 10 Scale and Budget Worksheet
A grade 10 design worksheet where students plan a fictional utility's leak-awareness poster, choosing colors and solving scale, area, and print-budget problems.
Grade 11 Worksheet
Calder Basin Water Use: Designing an Isotype Chart
Grade 11 students convert a fictional district's daily water use into icon counts, fit the rows to a report column, and test a scaled-icon distortion.
Grade 11 Worksheet
Havenlock Water Tower Elevation: A Scale Drawing Sheet
Grade 11 students size a dimensioned elevation of a fictional water tower, choose a scale that fits the sheet, and set the drawing's text and scale bar.
Grade 11 Worksheet
Redbank Well Nitrate Chart: Choosing an Axis Origin
Grade 11 students size bars for a fictional utility's nitrate chart, compare a zero baseline with a cut axis, and judge a newsletter claim built on the cut version.
Grade 9 Worksheet
A Calder Creek Water-Quality Dashboard: Grade 9 Value-Ramp Worksheet
Grade 9 art and data worksheet where students design an accessible value-ramp status dashboard and match displayed precision to instrument limits.
Grade 10 Worksheet
Baymoor PFAS Cleanup: A GAC Treatment Technician Worksheet
A grade 10 careers worksheet where students act as a treatment technician at fictional Baymoor, checking PFAS levels against the MCL and reporting to the right precision.
Grade 10 Worksheet
Crane Hollow Filter Loading Rate: A Water Operator Worksheet
A grade 10 careers worksheet where students act as a filtration operator at the fictional Crane Hollow plant, computing filter loading rates in gpm per square foot.
Grade 11 Worksheet
Drennan Ridge Well Field: A Pumping and Hydraulics Worksheet
A grade 11 careers worksheet on operator hydraulics: students find well drawdown, pipe velocity, flow conversions, and tank fill time at a fictional well field.
Grade 11 Worksheet
Fenmark Plant Chlorination: An Operator Pounds-Formula Worksheet
A grade 11 careers worksheet where students use the operator pounds formula to find chlorine feed, demand, and flow at a fictional water treatment plant.
Grade 12 Worksheet
Operator Exam Math at Wexmoor Water Plant
A grade 12 careers worksheet of operator-certification math at a fictional plant, using the pounds formula, flow, tank volume, and pressure conversions.
Grade 10 Worksheet
Cinderhill Wellfield Capacity: A Grade 10 Drawdown Worksheet
A grade 10 engineering worksheet on groundwater supply: students find well drawdown and specific capacity, combine well yields, and model yield as a function of drawdown.
Grade 10 Worksheet
Marlin Cove Water Main: A Grade 10 Pipe Hydraulics Worksheet
A grade 10 worksheet sizing a fictional coastal water main: cross-sectional area, flow-to-velocity conversions, and the pressure a tank height delivers to the taps.
Grade 12 Worksheet
Pindrock Meter Test Bench: Accuracy and Lost Revenue Worksheet
A grade 12 worksheet where students grade water meters on a fictional utility's test bench, compute percent accuracy, and trace under-registration into lost revenue.
Grade 12 Worksheet
Sitwell Basin Aquifer Storage and Recovery Worksheet
A grade 12 worksheet on a fictional aquifer storage and recovery project: porosity from core samples, recoverable storage in acre-feet and gallons, and injection math.
Grade 9 Worksheet
Culverstone Main Replacement: Sizing a Thrust Block
A grade 9 worksheet on a fictional water main replacement where students find the thrust at a bend under test pressure and size the concrete block that resists it.
Grade 9 Worksheet
Duskin Community Farm: Drip Irrigation Design Worksheet
A grade 9 worksheet where students size a drip system for a fictional community farm plot, finding flow, run time, and the water it saves over sprinklers.
Grade 9 Worksheet
Hollowbrook Treatment Wetland: Sizing a Natural System
A grade 9 worksheet where students size a constructed treatment wetland for a fictional small community, finding area, removal efficiency, and detention time.
Grade 9 Worksheet
Kestrelmoor Plating Rinse: Sizing a Neutralization Tank
A grade 9 worksheet sizing a pH neutralization tank for a fictional plating shop, covering detention time, tank geometry, caustic use, cost, and a permit check.
Grade 10 Worksheet
Above the Limit: Reading a Home PFAS Result and a Rule in Motion
A grade 10 consumer worksheet where students compare a fictional home's PFOA and PFOS results to the 4.0 ppt limit and interpret a proposed compliance deadline exemption.
Grade 10 Worksheet
How Much Does Bottled Water Really Cost the Ramos Family?
A grade 10 consumer worksheet comparing the per-gallon and yearly cost of bottled versus tap water for a fictional family, with two conservation calculations.
Grade 11 Worksheet
The Delgado Household Water-Use Audit: Gallons and Savings
A grade 11 consumer-science worksheet where students audit a fictional household's daily water use by fixture and calculate the savings from WaterSense fixtures.
Grade 11 Worksheet
The Water Footprint of a Week's Meals: Beef and Wheat
A grade 11 consumer-science worksheet where students estimate the water footprint of a fictional week's menu using published beef and wheat water-use figures.
Grade 9 Worksheet
Maren's Cross-Country Sweat Rate and Hydration Worksheet
Grade 9 consumer-health worksheet where students convert a runner's weight loss into ounces, cups, and milliliters to plan fluid replacement.
Grade 9 Worksheet
The Renslow Well PFAS Report: A Parts-per-Trillion Worksheet
Grade 9 consumer-health worksheet reading a fictional well's PFAS results against the 4.0 ppt limit, with percent-of-limit and trace-concentration math.
Grade 9 Worksheet
The Yardley Home Water-Test Kit: pH, Chlorine, and Turbidity
Grade 9 consumer-health worksheet reading a fictional home test kit and comparing pH, chlorine, turbidity, and hardness to common water-quality guidelines.
Grade 10 Worksheet
Alderpoint Filter Loading Rate and Backwash Worksheet
A grade 10 worksheet on filter loading rates at a fictional treatment plant, where students find rectangular filter area, convert MGD to gpm, and size backwash flow.
Grade 10 Worksheet
Cliffmere Transmission Main: Flow, Velocity, and Continuity
A grade 10 worksheet applying Q = A x V to a fictional transmission main: circle area, velocity checks against a design limit, and cfs, gpm, and MGD conversions.
Grade 10 Worksheet
Copperline Water Authority Flow Conversion Worksheet
A grade 10 worksheet chaining unit conversions for a fictional river withdrawal: MGD to gpm to cfs, gallons to acre-feet, and pipe area from the continuity equation.
Grade 10 Worksheet
Cragmont Wellfield: Drawdown and Casing Volume Worksheet
A grade 10 geometry worksheet where students find well drawdown, specific capacity, and casing water volume for a fictional town's groundwater production well.
Grade 10 Worksheet
Greywillow Reclamation Facility: BOD Removal and Loading Worksheet
A grade 10 worksheet using the pounds formula and removal-efficiency formula on a fictional city's wastewater plant, comparing BOD and TSS to secondary limits.
Grade 10 Worksheet
Marloch Commerce Park: Stormwater Runoff and Detention Design
A grade 10 worksheet using the rational method and rectangular-volume geometry to size a detention basin for a fictional town's commerce park development.
Grade 10 Worksheet
Merrivale Well Blend: Meeting the 4 ppt PFAS Limit
A grade 10 worksheet on PFAS: students blend two fictional wells, size treatment removal, and write an equation to meet the 4.0 ppt federal limit.
Grade 10 Worksheet
Skelbourne Basin Yield: Watershed Area and Reservoir Refill
A grade 10 worksheet on a fictional watershed where students convert square miles to acre-feet of runoff and test whether one reservoir covers town demand.
Grade 10 Worksheet
Thistledown Creek Water Quality Monitoring Worksheet
A grade 10 worksheet where students compute turbidity removal efficiency, compare dissolved oxygen to a fish benchmark, and check pH for a fictional creek.
Grade 10 Worksheet
Verdant Hollow Recovery Facility: Nutrient Load and Removal
A grade 10 worksheet using the pounds formula to find nitrogen and phosphorus loads, removal efficiency, and permit compliance at a fictional treatment plant.
Grade 10 Worksheet
Wolvercote Park-and-Ride Lot: Sizing an Infiltration Trench
A grade 10 worksheet where students size a gravel infiltration trench for a fictional parking lot using runoff volume, void space, and a 72-hour drawdown limit.
Grade 11 Worksheet
Brenhollow's Center Pivots: Circles, Acre-Feet, and Pump Hours
A grade 11 worksheet on a fictional farm district's quarter-mile center pivot, moving from circle area to acre-feet, gallons, pump hours, and an aquifer cap.
Grade 11 Worksheet
Corriston Valley Almond Orchard: An Irrigation Water-Budget Worksheet
A grade 11 worksheet using dimensional analysis to size an irrigation water budget for a fictional almond orchard, converting acre-feet to gallons, gpm, and MGD.
Grade 11 Worksheet
Draycott Municipal Well: Drawdown and Specific-Capacity Worksheet
A grade 11 worksheet on a new municipal well: students find drawdown, specific capacity, an average rate of change, and a pump discharge pressure in feet of head.
Grade 11 Worksheet
Halstead Springs Sedimentation Basin: Detention and Overflow
A grade 11 worksheet computing basin volume, detention time, surface overflow rate, and weir overflow rate for a fictional plant's rectangular settling basin.
Grade 11 Worksheet
Marrow Gap Booster Pump Station: Flow, Head, and Precision
A grade 11 worksheet on a fictional booster pump station: pipe area, velocity, flow-rate conversions, well drawdown, and head-to-pressure with sensible precision.
Grade 11 Worksheet
Quillan Bend Filtration Plant: Loading Rate and Detention Time
A grade 11 worksheet on a fictional conventional treatment plant: filter loading rate as a density, basin volume, detention time, and a turbidity compliance check.
Grade 11 Worksheet
Thackery Mills Reclamation Plant: Loading and Removal Efficiency
A grade 11 worksheet applying the pounds formula and removal-efficiency percentages to a fictional water reclamation facility's BOD and TSS data.
Grade 11 Worksheet
Tilbourne Hollow's Detention Basin: Volume, Storage, and Drawdown
A grade 11 worksheet on a fictional town's stormwater detention basin, using sloped-side geometry, acre-feet, design-storm runoff, and drawdown time.
Grade 11 Worksheet
Wendover Valley Hypochlorite Feed: Dose and Pump-Setting Math
A grade 11 operator-math worksheet: turn a chlorine dose at a fictional plant into pounds per day, gallons of 12.5% hypochlorite, and a feed-pump setting.
Grade 12 Worksheet
Deblin Creek Reclamation: F/M Ratio, Sludge Age, and Loading
A grade 12 wastewater worksheet on activated sludge process control: solids inventory, BOD loading, the F/M ratio, sludge age, and removal efficiency.
Grade 12 Worksheet
Elderton Filtration Plant: Loading, Backwash, Detention
A grade 12 worksheet computing filter loading rates as a density, sedimentation-basin detention time, and a turbidity check for a fictional water treatment plant.
Grade 12 Worksheet
Glenmarr Hydroelectric Station: Storage and Power Output
A grade 12 worksheet using unit analysis to convert reservoir storage and turbine flow and compute a fictional dam's power output.
Grade 12 Worksheet
Marchwood Softening Plant: Hardness, Alkalinity, and Lime Dose
A grade 12 operator-math worksheet on lime softening: hardness in grains and mg/L as CaCO3, removal efficiency, lime feed in pounds per day, and detention time.
Grade 12 Worksheet
Northgate Business Park: Detention Basin and Pipe Flow
A grade 12 worksheet applying the rational method and the continuity equation to size a fictional business park's storm outlet pipe and detention basin.
Grade 12 Worksheet
Ospreyfield Digester Gas: Volatile Solids to Kilowatt-Hours
A grade 12 worksheet tracing a fictional plant's sludge from volatile solids destroyed to biogas, energy density in BTU per cubic foot, and generated electricity.
Grade 12 Worksheet
Operator Unit Conversions at the Oswell Water Authority
A grade 12 math worksheet drilling the flow, volume, weight, and concentration conversions on operator-certification exams, all built around one fictional utility.
Grade 12 Worksheet
Sunmere Brackish RO Plant: Recovery, Rejection, and Energy Use
A grade 12 worksheet on a fictional brackish desalination plant, chaining flow, salt-balance, and energy calculations for a reverse osmosis system.
Grade 12 Worksheet
Talbrook Water Authority Staffing: Operator Hours and Payroll
A grade 12 worksheet on staffing a fictional plant around the clock: coverage hours, full-time equivalents, overtime versus a new hire, and cost per connection.
Grade 12 Worksheet
Wickham Commons: Green Infrastructure Runoff and Detention
A grade 12 stormwater worksheet using the rational method: composite runoff coefficients, peak flow in cfs and gpm, and detention volume for a redevelopment site.
Grade 9 Worksheet
Brindlemoor Pressure Zones: Elevation and PSI Worksheet
A grade 9 worksheet on the fictional Brindlemoor Water District, converting ground elevation to water pressure in psi across three streets with the 0.433 rule.
Grade 9 Worksheet
Draymoor Transmission Main: A Pipe Velocity and Flow Worksheet
A grade 9 worksheet using the continuity equation Q = A x V to find pipe velocity and flow in a fictional water district's transmission mains.
Grade 9 Worksheet
Dunmere Clarifier Testing: Removal Efficiency and Oxygen
A grade 9 water-testing worksheet at the fictional Dunmere plant, calculating turbidity removal efficiency and checking dissolved oxygen against a fish limit.
Grade 9 Worksheet
Hollisford Well Field: Specific Capacity and Drawdown Worksheet
A grade 9 worksheet on well drawdown and specific capacity, where students build and solve a linear model for a fictional municipal well.
Grade 9 Worksheet
Holloway Creek Plant: Nutrient Loading and Load Limits
A grade 9 worksheet at the fictional Holloway Creek plant, using the pounds formula to find nutrient loads and solving for a concentration that meets a permit.
Grade 9 Worksheet
Ormsleigh School's Rain Cistern: Roof Yield and Tank Size
A grade 9 worksheet where students model a fictional school cistern as a cylinder, find the roof runoff from a storm, and size the tank to hold it.
Grade 9 Worksheet
Wrayford Beck Watershed: Rain Depth to Reservoir Yield
A grade 9 worksheet on a fictional watershed where students write a runoff equation and convert an annual yield to gallons, MGD, and cubic feet per second.
Grade 10 Worksheet
Aldermere Plant UV Disinfection: Dose and Log Inactivation
A grade 10 science worksheet where students calculate ultraviolet dose from intensity and contact time, then test it against a fictional plant's inactivation targets.
Grade 10 Worksheet
Braemar Wells GAC Treatment for PFAS: Carbon Bed Breakthrough
A grade 10 science worksheet on PFAS removal, carbon contact time, and breakthrough for a fictional district's activated-carbon vessels, with a treatment trade-off.
Grade 10 Worksheet
Calumet Heights Lead Service Lines: Reading the New Rule
A grade 10 worksheet on the fictional Calumet Heights system: students find a 90th-percentile lead reading, compare it to a tightening action level, and plan replacement.
Grade 10 Worksheet
Elderbrook Water Hardness: From Limestone to Lime Softening
A grade 10 chemistry worksheet on water hardness, converting between mg/L and grains per gallon and finding softening removal for a fictional utility.
Grade 10 Worksheet
Kelbury Road Salt: Chloride Loading in Tarnwick Creek
Grade 10 students convert a winter's road salt into chloride mass, calculate stream loading in pounds per day, and judge whether a salt policy change would work.
Grade 10 Worksheet
Marrow Creek Reclamation Plant: BOD Removal and Activated Sludge
A grade 10 science worksheet set at the fictional Marrow Creek plant, where students compute BOD and TSS removal efficiency and check secondary-treatment compliance.
Grade 10 Worksheet
Quarnwood Landfill Plume: Travel Time in the Dellwick Aquifer
Grade 10 students use monitoring well data to find a hydraulic gradient, calculate seepage velocity, and estimate how long a landfill plume needs to reach a well field.
Grade 10 Worksheet
Redhawk Intake Channel: Flow, Velocity, and Continuity
A grade 10 hydraulics worksheet at the fictional Redhawk intake, applying Q = A x V to find flow and velocity and converting between cfs, gpm, and MGD.
Grade 10 Worksheet
Saddleback Farms: Comparing Flood and Drip Irrigation Water Use
A grade 10 worksheet where students compute crop water demand and compare flood and drip irrigation efficiency for a fictional farm weighing a system switch.
Grade 10 Worksheet
Wexmoor River Oxygen Sag: Reading a Dissolved-Oxygen Profile
A grade 10 science worksheet where students read a dissolved-oxygen profile downstream of a discharge, find the sag point, and compare it to the fish threshold.
Grade 10 Worksheet
Yarrowton Orchard Irrigation: Tracking Soil Water and Crop Use
Grade 10 students run a seven-day soil water balance for an apple orchard, decide when to irrigate, and compare the water a drip and a sprinkler system would need.
Grade 11 Worksheet
Bewley Reclamation Plant: BOD and TSS Removal Efficiency
A grade 11 worksheet on a fictional wastewater plant, computing BOD and TSS removal efficiency and daily pollutant loading with the pounds formula.
Grade 11 Worksheet
Coldstream Well 4: Drawdown, Total Dynamic Head, and Pump Power
A grade 11 hydraulics worksheet where students compute drawdown, specific capacity, total dynamic head, and pump horsepower for a fictional municipal well.
Grade 11 Worksheet
Ellingham's Peak Day: Per-Capita Demand and a Conservation Target
A grade 11 worksheet on per-capita demand, peaking factors, and how two ordinary conservation measures change a growing town's projected peak-day water use.
Grade 11 Worksheet
Halcombe Bay Desalination: Recovery, Rejection, and Membrane Flux
A grade 11 reverse osmosis worksheet: students calculate recovery, salt rejection, brine mass balance, membrane flux, and energy use for a fictional desalination plant.
Grade 11 Worksheet
Havenmoor Watershed Water Budget: Recharge and Drought Math
A grade 11 earth-science worksheet building a water budget for a fictional watershed, partitioning precipitation into evapotranspiration, runoff, and aquifer recharge.
Grade 11 Worksheet
Larkfield Commons Runoff: Rational Method and Bioretention Sizing
A grade 11 stormwater worksheet where students use the rational method to compare pre- and post-development runoff and size a bioretention cell for a fictional site.
Grade 11 Worksheet
Oakhaven Clarifier: Detention Time and Overflow Rate
A grade 11 worksheet sizing a fictional clarifier by volume, detention time, surface overflow rate, and weir loading, checking detention against the design range.
Grade 11 Worksheet
Oshton's Biosolids: Nitrogen, Phosphorus, and the Agronomic Rate
A grade 11 worksheet turning a plant's daily solids production into an application area, then showing why phosphorus rather than nitrogen limits how many acres it covers.
Grade 11 Worksheet
Vardley's Hard Groundwater: Hardness and Alkalinity Worksheet
A grade 11 chemistry worksheet on carbonate hardness and alkalinity, using a fictional town's limestone-aquifer water to compute total hardness and buffering.
Grade 12 Worksheet
Bexmoor Lead Sampling: The 90th Percentile Rule
A grade 12 statistics worksheet computing the median, mean, range, and the Lead and Copper Rule 90th percentile from a fictional utility's ten tap samples.
Grade 12 Worksheet
Nitrification Stoichiometry and Alkalinity at Cawdry
A grade 12 science worksheet deriving oxygen demand and alkalinity destruction per gram of nitrogen from a balanced equation, then applying both to a plant's daily load.
Grade 12 Worksheet
Reverse Osmosis Flux and Specific Energy at Corravale
A grade 12 science worksheet on a fictional seawater desalination plant: students compute recovery, membrane flux, and the energy penalty per gallon of desalting.
Grade 12 Worksheet
Ferngate High-Service Pump: Tank Fill, Pressure, and Energy
A grade 12 science worksheet using operator math to find a fictional booster station's tank fill time, discharge pressure, and daily energy cost.
Grade 12 Worksheet
Effluent Toxicity and Dilution at the Marledge Outfall
A grade 12 science worksheet on whole effluent toxicity: students find the instream waste concentration, interpolate an LC50, and convert it to toxic units.
Grade 12 Worksheet
Filter Loading and Backwash Rates at the Marrowbrook Plant
A grade 12 science worksheet using operator math to find filter loading and backwash rates at a fictional plant and check them against the turbidity standard.
Grade 12 Worksheet
Alum Coagulant Dosing at the Penhallow Treatment Plant
A grade 12 worksheet applying the pounds formula, flow conversions, and turbidity removal efficiency across a fictional plant's coagulation and disinfection train.
Grade 12 Worksheet
Ravenglass Dam Hydropower: Head, Flow, and Energy
A grade 12 physics worksheet using the hydropower equation to find power, daily energy, and capacity factor for a fictional dam, with a drought sensitivity case.
Grade 12 Worksheet
Rational Method Runoff for a Thorncliff Development
A grade 12 science worksheet applying the rational method to a fictional parcel, comparing peak runoff before and after paving and sizing the detention it needs.
Grade 12 Worksheet
Disinfection CT and Baffling at the Whitcombe Clearwell
A grade 12 science worksheet on chlorine CT: students find contact time from clearwell volume and flow, apply a baffling factor, and check CT against a target.
Grade 12 Worksheet
Flood Frequency and Culvert Sizing on Tullimore Creek
A grade 12 science worksheet using 20 years of peak-flow records to rank floods, find return periods and exceedance risk, and size a replacement culvert.
Grade 9 Worksheet
Ashvale Reclamation Plant: BOD Loading and Removal Efficiency
A grade 9 science worksheet using the pounds formula and removal-efficiency formula on a fictional plant's flow to judge how well it cleans wastewater.
Grade 9 Worksheet
Water Hardness Testing at Calderwood: A Grade 9 Titration Worksheet
A grade 9 worksheet where students turn drop-count titration readings into water hardness in mg/L as calcium carbonate, classify samples, and find percent removal.
Grade 9 Worksheet
Copperfield Commons: Stormwater Runoff and the Rational Method
A grade 9 worksheet using the rational method to show how paving a fictional site raises peak stormwater runoff into a creek, and how green infrastructure lowers it.
Grade 9 Worksheet
Corvale's PFAS Pilot: GAC Removal Efficiency Worksheet
A grade 9 science worksheet on a fictional town's activated-carbon pilot, where students calculate PFAS removal efficiency and compare treated water to the federal limit.
Grade 9 Worksheet
Dunmore Lead Tap Sampling: Reading the Action Level
A grade 9 worksheet where students analyze a fictional town's lead tap-sampling data, find the 90th-percentile value, and compare it to the action levels.
Grade 9 Worksheet
Gantry Falls Dam: Calculating Hydropower Output and Demand
A grade 9 worksheet using head, flow, and efficiency to find a fictional dam's power and yearly energy, then weighing its output against a town's electricity demand.
Grade 9 Worksheet
Open-Channel Flow at Grantham: A Grade 9 Hydraulics Worksheet
A grade 9 hydraulics worksheet where students apply Q = A x V to an open channel, then convert flow between cubic feet per second, gpm, and MGD.
Grade 9 Worksheet
Chlorine Contact Time at Merrowfield: A Grade 9 CT Worksheet
A grade 9 worksheet where students find contact time from basin volume and flow, calculate CT for disinfection, and solve for the residual a plant needs at peak flow.
Grade 9 Worksheet
Ridgecomb Booster Station: Pipe Flow and Pressure Math
A grade 9 science worksheet where students use operator formulas to find pipe flow, convert units, and calculate pump pressure for a fictional town's booster station.
Grade 9 Worksheet
From Job Posting to Paycheck: Water-Sector Wage Math
A grade 9 careers worksheet where students convert hourly wages to annual pay, compare operator pay percentiles, and choose the right quantity for each comparison.
Grade 10 Worksheet
Grindstone Reservoir Elevated Tank: Volume and Pressure Worksheet
A grade 10 engineering worksheet on a fictional elevated storage tank, calculating tank volume and the water pressure its height delivers to neighborhoods below.
Grade 10 Worksheet
Pellworth Booster Pump Station: Run-Time and Energy Worksheet
A grade 10 engineering worksheet sizing a fictional booster pump's daily run-time, pipe velocity, and energy use, and writing a gallons-versus-time equation.
Grade 11 Worksheet
Aldous Commons Runoff: A Rational-Method Detention Sizing Worksheet
A grade 11 worksheet using the rational method to compare peak runoff before and after developing the fictional Aldous Commons site, then size a detention volume.
Grade 11 Worksheet
Bristow Reclamation: BOD and TSS Removal-Efficiency Worksheet
A grade 11 worksheet where students compute BOD and TSS removal efficiency and loading for the fictional Bristow plant and check it against the secondary standard.
Grade 12 Worksheet
Alder Flats Well Field: Drawdown and Specific-Capacity Worksheet
A grade 12 engineering worksheet where students compute well drawdown, specific capacity, and daily yield for two wells in a fictional well field, then compare them.
Grade 12 Worksheet
Harwick Plant Sedimentation Basin: Volume and Detention Time
A grade 12 engineering worksheet where students find a fictional basin's volume in gallons and its detention time, then test it against the typical 2-to-4-hour range.
Grade 9 Worksheet
Reed Valley Wastewater Plant: Removal Efficiency Worksheet
A grade 9 engineering worksheet on a wastewater plant: students compute BOD and TSS removal efficiency and pollutant loads and check them against the secondary standard.
Grade 10 Worksheet
Hartshorn Heights Booster Pump: Pipe Flow and Elevation Pressure
A grade 10 worksheet where students model a pipe as a circle, apply the continuity equation, and find elevation-driven pressure loss for a fictional booster pump station.
Grade 10 Worksheet
Nettlebrook Reservoir: Chlorine Dosing and pH Compliance Worksheet
A grade 10 worksheet on chlorine dosing with the pounds formula and pH compliance checks against real EPA drinking-water standards for a fictional treatment plant.
Grade 10 Worksheet
Quillfeather RO Plant: Percent Recovery and Flow Conversions
A grade 10 worksheet in which students calculate reverse osmosis percent recovery, reject flow, and gallon-to-MGD conversions for a fictional groundwater plant.
Grade 11 Worksheet
Alder Basin's Chlorine Feed Rate: Pounds Formula and Unit Conversions
A grade 11 worksheet where students use the pounds formula and chained unit conversions to size a fictional plant's chlorine feed rate and solution dosing.
Grade 11 Worksheet
Kestrel Bend's Clearwell: Chlorine Dosing and Detention-Time Math
Grade 11 students chain unit conversions through the pounds formula and detention-time formula to check a fictional plant's chlorine dose and clearwell sizing.
Grade 12 Worksheet
Briarcliff Water Plant: Chained Unit Conversions and Chlorine Feed
A grade 12 worksheet where students chain MGD, gpm, and cfs conversions and apply the operator pounds formula to set a chlorine feed rate at a fictional treatment plant.
Grade 9 Worksheet
Thornridge's Reservoir Allocation: Acre-Feet to MGD Unit Conversions
A grade 9 worksheet where students chain acre-foot, cubic-foot, and gallon conversions to size a fictional town's reservoir allocation in MGD and gpm.
Grade 10 Worksheet
Sable Point Desalination: Salt Rejection and Recovery Rate Worksheet
A grade 10 worksheet where students calculate salt rejection, recovery rate, and energy use at a fictional coastal reverse-osmosis desalination facility.
Grade 11 Worksheet
Fenwick Hollow's Bacteria: Nitrification, Denitrification, and Removal
Grade 11 students trace how two bacterial processes strip nitrogen from wastewater at a fictional plant and calculate removal efficiency and pounds removed per day.
Grade 12 Worksheet
Chlorine Feed Rate and Detention Time at Blackstone Falls
A grade 12 worksheet using the pounds formula, the detention-time formula, and chlorine demand to size disinfection feed at a fictional treatment plant.
Grade 9 Worksheet
Marrow Creek's Constructed Wetland: Nitrate Removal and Detention Time
A grade 9 worksheet where students calculate nitrate removal efficiency, loading, and detention time for a fictional constructed wetland treating farm runoff.
Grade 9 Worksheet
Piloting Reverse Osmosis for Salt Fork's Brackish Well Water
A grade 9 worksheet in which students size a reverse osmosis pilot skid for a fictional town's brackish well, calculating recovery rate and concentrate salinity.
Grade 9 Worksheet
Chlorine Dosing at Thistle Hollow: A Grade 9 Unit-Conversion Worksheet
A grade 9 worksheet where students chain unit conversions and the pounds formula to calculate chlorine feed rates for a fictional town's water treatment plant.
Grade 9 Worksheet
Antelope Wash Water Rights: A Prior Appropriation Worksheet
Grade 9 worksheet where students convert two fictional farms' acre-foot water rights to gallons and apply prior appropriation to a drought-year shortage.
Math problem sets
Grade 9 Math problem set
Rennick Valley Center Pivots: Run Times and Canal Capacity
A grade 9 problem set on scheduling six center pivots under a canal limit using acre-inches, run times, inequalities, and wheat water use per pound.
Grade 10 Math problem set
Askwith Heights Pressure Zone: Distribution Operator Math
A grade 10 careers math set following a distribution operator through a low-pressure complaint and a flushing run, using head, pressure, flow, and pipe volume.
Grade 10 Math problem set
Trennow's Chemical Feed Shift: Treatment Operator Math
A grade 10 careers math set that walks a trainee operator through one shift of chemical feed, dosing, storage, and filter loading calculations at a fictional plant.
Grade 9 Math problem set
Bramstead Utility: What a Class II License Costs and Returns
Ten grade 9 careers problems following a fictional operator-in-training through course fees, study hours, a wage step, and the months it takes to earn the cost back.
Grade 9 Math problem set
Tollesby Plant Exam Prep: Operator Conversion and Dosage Drills
Ten grade 9 careers problems drilling the conversions an operator certification exam asks for, all drawn from one fictional plant's tanks, flows, and chlorine feed.
Grade 11 Math problem set
Ferrisholt Stormwater Fees: An ERU and Runoff Problem Set
A grade 11 careers problem set in which students work as a stormwater program specialist, billing a shopping center by impervious area and checking its peak runoff.
Grade 11 Math problem set
Saltmarch Ridge Irrigation: Acre-Feet and Run-Time Math
A grade 11 careers problem set in which an irrigation technician converts a net application depth to acre-feet and gallons, then solves for pivot run time and water cost.
Grade 12 Math problem set
Brayfield Ridge UV Disinfection: An Operator's Dose Math
Grade 12 problem set on ultraviolet disinfection operations: reactor loading, exposure time, derated delivered dose, and putting a standby reactor in service.
Grade 12 Math problem set
Ludderby Creek Reclamation Plant: Operator Loading Math
Grade 12 operator-exam problem set on BOD and TSS loading, removal efficiency, basin volume, and detention time at a fictional water reclamation facility.
Grade 12 Math problem set
Netherstowe Stormwater District: Rational Method Technician Math
Grade 12 problem set applying the rational method, area-weighted runoff coefficients, and pipe capacity to a fictional stormwater district facing new development.
Grade 12 Math problem set
Skelwick Valley Reuse Program: Acre-Foot Cost Math
Grade 12 problem set on recycled water economics: annual production in acre-feet, revenue, avoided cost, payback, energy use, and a marginal-cost supply argument.
Grade 10 Math problem set
Kestrel Cove Desalination: Reverse-Osmosis Operator Math
A grade 10 careers math set at the fictional Kestrel Cove desal plant, where students compute permeate and concentrate flows, recovery, and energy use.
Grade 11 Math problem set
Sarrow Point Desalination: A Recovery and Energy Problem Set
A grade 11 careers problem set where students find recovery, permeate and concentrate flows, and energy use at a fictional seawater reverse osmosis plant.
Grade 12 Math problem set
Kestrel Bay Desalination: Recovery and Energy Math
A grade 12 careers math set on a fictional reverse osmosis desalination plant, chaining recovery, flow, and energy math to find the daily cost of fresh water.
Grade 10 Math problem set
Kestrel Junction PFAS Adsorber: A Grade 10 GAC Sizing Problem Set
Grade 10 engineering math sizing a granular activated carbon adsorber for PFAS removal: flow splits, loading rate, bed volume, contact time, and the 4.0 ppt limit.
Grade 11 Math problem set
Calderwick Water Rates: A Two-Part Bill and Rate-Increase Problem Set
A grade 11 engineering problem set on a utility's two-part water rate: writing bill equations, comparing a rate increase, and testing an affordability threshold.
Grade 12 Math problem set
Saxby Terrace Pressure Zone: Elevation and Tank Head Problems
A grade 12 problem set where students convert tank and street elevations into static pressures, find pressure-zone limits, and size a tank's usable storage.
Grade 12 Math problem set
Verlow Reservoir Drought Supply: Acre-Foot and Demand Problems
A grade 12 problem set where students convert a fictional reservoir's acre-foot storage to gallons, subtract the dead pool, and project days of supply in a drought.
Grade 9 Math problem set
Brindlecote Intake Screen: Sizing for Through-Screen Velocity
A grade 9 set where students convert a fictional town's river intake flow from MGD to cfs, then size a cylindrical wedge-wire screen to hold through-screen velocity down.
Grade 9 Math problem set
Fennbrook Carbon Adsorber: Sizing a PFAS Removal Vessel
A grade 9 set that sizes a fictional granular activated carbon vessel for PFAS removal, using cylinder volume, empty bed contact time, and bed volumes.
Grade 9 Math problem set
Harrowmede Reservoir: A Dry-Year Water Budget in Acre-Feet
A grade 9 set where students build a dry-year water budget for a fictional reservoir, converting MGD to acre-feet and solving for the years left before dead pool.
Grade 9 Math problem set
Ostermill Orthophosphate Feed: Corrosion Control Dose Math
A grade 9 set on a fictional district adding orthophosphate after a high lead result, using the pounds formula to size the feed, the day tank, and the yearly cost.
Grade 10 Math problem set
Brindlewick Center-Pivot Irrigation: Area, Volume, and Flow Rate
A grade 10 problem set using circle area and density to size a fictional farm's center-pivot irrigation, from inches of applied water to gallons and flow rate.
Grade 10 Math problem set
Calder Ridge Reservoir and Dam: Volume, Head, and Flow Problems
A grade 10 problem set converting a fictional reservoir's acre-feet to gallons, finding pressure at a dam's turbines, and tracking powerhouse flow through unit chains.
Grade 10 Math problem set
Cattail Slough Phosphorus Load: A Grade 10 Nutrient Removal Set
Grade 10 nutrient-control math: students use the pounds formula to find phosphorus loading, the removal needed, and the fertilizer recovered at a recovery facility.
Grade 10 Math problem set
Dunmoor Plant Fluoride and Alum Feed: The Pounds Formula
A grade 10 problem set where students compute chemical feed rates in pounds per day with the operator pounds formula and convert between mg/L, percent, and ppm.
Grade 10 Math problem set
Foxtail Commons Runoff: A Grade 10 Rational-Method Detention Set
Grade 10 stormwater math: students use the rational method to find peak runoff, size a detention basin, and find a composite runoff coefficient.
Grade 10 Math problem set
Halden Bay Desalter: Membrane Flux and Salt Rejection
A grade 10 problem set on reverse osmosis: students find membrane flux, count elements and vessels, and compute salt rejection at a fictional brackish desalter.
Grade 10 Math problem set
Larkhollow Lift Station Pump Cycle Problem Set
A grade 10 problem set on a fictional wastewater wet well: students find its working volume, fill and pump-down times, cycle length, and daily pump starts.
Grade 10 Math problem set
Oxbow Bend Nitrogen Loading and Water Reuse Problems
A grade 10 problem set applying the pounds formula to nitrogen at a fictional plant, treating the nutrient as both a river pollutant and a fertilizer resource.
Grade 10 Math problem set
Pallenford Main Canal: Trapezoid Area and Flow Rate Problems
A grade 10 problem set where students model a fictional irrigation canal as a trapezoid, find its flow with Q = A × V, and convert cubic feet per second to acre-feet.
Grade 10 Math problem set
Ravenglass Dam Hydropower: Capacity Factor and Energy
A grade 10 problem set separating power from energy: students find capacity factor, convert MWh to kWh, and count homes powered at a fictional hydroelectric dam.
Grade 10 Math problem set
Saltcombe Reverse Osmosis Plant: Flow Balance and Energy Problems
A grade 10 problem set solving a feed-permeate-concentrate system of equations for a fictional desalter, then finding recovery, salt rejection, and energy use.
Grade 10 Math problem set
Willowmere Aquifer Storage: Volume, Yield, and Overdraft
A grade 10 problem set on groundwater: students find aquifer storage in acre-feet and gallons, apply specific yield, and test pumping against a safe-yield limit.
Grade 11 Math problem set
Kestrel Bend PFAS: GAC Contactor Sizing and Contact-Time Problems
A grade 11 math problem set on removing PFAS with granular activated carbon: percent reduction, flow conversions, bed volume, and empty bed contact time.
Grade 11 Math problem set
Larkmoor Junction Transmission Main: Flow, Velocity, and Pipe Geometry
A grade 11 problem set modeling a fictional transmission main as a cylinder, converting MGD to gpm and cfs, and using Q = A x V for velocity, volume, and travel time.
Grade 11 Math problem set
Pentley Well Field: Drawdown, Specific Capacity, and Yield
A grade 11 problem set on a fictional well field: compute drawdown and specific capacity, solve for a safe pumping rate, and check the field against district demand.
Grade 11 Math problem set
Seabright Bay Desalination: Reverse-Osmosis Recovery and Energy
A grade 11 problem set on a fictional seawater RO plant, finding permeate and brine flows, percent recovery and salt rejection, an equation model, and daily energy cost.
Grade 11 Math problem set
Thornwell Dam Hydropower: Head, Flow, and Power Output Problems
A grade 11 math problem set on a small hydropower turbine: converting flow units, computing water horsepower and kilowatts, and solving for a target output.
Grade 11 Math problem set
Torvale Coast RO Blending: Recovery and a TDS Mass Balance
A grade 11 problem set on a fictional brackish RO plant: find recovery, solve a blended-TDS mass balance for the bypass fraction, and estimate daily energy.
Grade 12 Math problem set
Brindlemere Reclamation Plant: BOD Loading and Removal
A grade 12 problem set using the pounds formula to find BOD mass loading and removal efficiency at a fictional reclamation plant.
Grade 12 Math problem set
Coyle Valley Irrigation District: Acre-Feet and Conveyance
A grade 12 problem set on a fictional irrigation district, chaining acre-feet, gallons, MGD, and cfs while accounting for canal conveyance losses and crop water.
Grade 12 Math problem set
Craymoor Pump Station: Horsepower, Efficiency, and Energy Cost
A grade 12 problem set on pump math: total dynamic head, water and brake horsepower, wire-to-water efficiency, energy cost in kWh, and the pump affinity laws.
Grade 12 Math problem set
Deepwell Booster Station: Dynamic Head and Energy Cost
A grade 12 problem set computing total dynamic head, water and brake horsepower, and daily pumping energy cost for a fictional booster pump station.
Grade 12 Math problem set
Grayling Ford Filter Backwash: Rates, Volumes, and Tank Sizing
A grade 12 problem set on filter operations at a fictional plant: loading rates with a filter offline, backwash flow and volume, rise rate, and sizing a wash-water tank.
Grade 12 Math problem set
Halloway Standpipe: Storage, Fire Flow, and Pressure
A grade 12 problem set sizing a fictional town's standpipe, converting elevation to service pressure, and checking whether stored water meets a two-hour fire-flow demand.
Grade 12 Math problem set
Ostwick Recovery Facility: Nutrient Loading and Phosphorus Recovery
A grade 12 problem set on nutrient loads at a recovery facility: nitrogen and phosphorus loading, removal efficiency, and phosphorus recovered as fertilizer.
Grade 12 Math problem set
Quillbeck Solvent Plume: Darcy Velocity and Travel Time
A grade 12 problem set applying Darcy's law to a fictional spill site, finding seepage velocity, sorption-slowed plume travel time to a well, and solvent mass flux.
Grade 12 Math problem set
Stonebriar Reservoir: Sediment Inflow and Lost Storage
A grade 12 problem set converting a fictional watershed's sediment yield into lost reservoir storage, then comparing linear and exponential models of capacity loss.
Grade 12 Math problem set
Trenwick Regional Water: Rate Design and Revenue Requirement
A grade 12 problem set on utility finance: revenue requirement, fixed and volumetric charges, a break-even usage, debt-service coverage, and an affordability check.
Grade 12 Math problem set
Wraymont Plant: Chlorine Dose, Demand, and Hypochlorite Feed
A grade 12 problem set on a fictional treatment plant, using the pounds formula to size chlorine dose, demand, hypochlorite feed, and clearwell contact time.
Grade 12 Math problem set
Yarrowdale Center Pivot: Irrigation Depth, Flow, and Run Hours
A grade 12 problem set sizing a fictional farm's center pivot, converting crop water need in inches to gallons, then to gpm, MGD, and cfs, and testing a well's capacity.
Grade 9 Math problem set
Caldbeck Treatment Plant: Alum Coagulant Dosing Problem Set
A grade 9 problem set using the pounds formula to size alum coagulant feed, plan bag supply, and stay within a fictional plant's pump and cost limits.
Grade 9 Math problem set
Copperton Booster Pump Station: Horsepower and Energy Cost
A grade 9 problem set that sizes a fictional booster pump in water horsepower, then works through kilowatts and daily and yearly pumping energy cost.
Grade 9 Math problem set
Ferncliff Dam: Reservoir Flow and Hydropower Energy
A grade 9 problem set at the fictional Ferncliff Dam, using Q equals A times V for penstock flow, converting cfs to gpm and MGD, and separating power from energy.
Grade 9 Math problem set
Hartwell Water Rates: Funding a Pipe Replacement Plan
A grade 9 problem set where students model a fictional town's water bill, calculate a rate increase and affordability burden, and graph a pipe-replacement schedule.
Grade 9 Math problem set
Marbury Phosphorus Removal: Alum Dose and Nutrient Recovery
A grade 9 set using the pounds formula to size chemical dosing for phosphorus removal at a fictional water resource recovery facility, then to weigh nutrient recovery.
Grade 9 Math problem set
Netherford Wastewater Plant: BOD Removal and Loading Problem Set
A grade 9 problem set applying removal efficiency and the pounds formula to BOD at a fictional wastewater plant, checked against the 30 mg/L secondary standard.
Grade 9 Math problem set
Oakmere Pump Station: Wet Well Flow and Run Time
A grade 9 problem set at the fictional Oakmere pump station, finding wet-well volume, using Q equals A times V, converting cfs and MGD, and modeling the emptying time.
Grade 9 Math problem set
Verwood Irrigation District: A Crop Water Budget Problem Set
A grade 9 problem set converting inches of applied water into acre-feet, gallons, and MGD to size a fictional irrigation district's seasonal water budget.
Grade 9 Math problem set
Willowvane Constructed Wetland: Nitrogen Loading and Sizing
A grade 9 problem set on a fictional polishing wetland, using the pounds formula to find nitrogen load, removal rate, detention time, and acres needed.
Grade 10 Math problem set
Ashford Reservoir Water Budget: Acre-Feet and Days of Supply
A grade 10 problem set at the fictional Ashford Reservoir, building a drought water budget in acre-feet and solving an equation for the days until a critical low level.
Grade 10 Math problem set
Crestview Booster Pump: Horsepower, Energy, and Operating Cost
A grade 10 problem set where students chain the water-horsepower formula through efficiency to find a fictional pump station's daily energy use and cost.
Grade 10 Math problem set
Fallowbrook Reclamation: Solids Loading and Digester Detention
Ten linked grade 10 problems that follow solids from a primary clarifier through an anaerobic digester to dewatered cake, using the pounds formula and tank volumes.
Grade 10 Math problem set
Glenmoor Clearwell: Chlorine Contact Time and CT Values
A grade 10 problem set on disinfection where students size a clearwell, find contact time with a baffling factor, and compute the CT a fictional plant achieves.
Grade 10 Math problem set
Greywillow Plant: Detention Time and Filter Loading Rates
A grade 10 problem set at the fictional Greywillow treatment plant, computing basin volume, detention time, and filter loading rate and comparing each to design ranges.
Grade 10 Math problem set
Quintara Heights Pressure Zones: Head, Pressure, and Storage
A grade 10 problem set where students convert elevation head to pressure, size a cylindrical tank in gallons, and find supply time for a fictional hilly utility.
Grade 10 Math problem set
Wickstead Wells: Oxidizing Iron and Manganese Before Filtration
Grade 10 problems that size a chlorine feed for iron and manganese oxidation at a well field plant, then check filter loading rates and backwash volumes.
Grade 11 Math problem set
Bramfield Water Recovery Plant: F:M Ratio and Solids Retention Time
A grade 11 problem set on activated sludge control: students compute BOD loading, an F:M ratio, solids retention time, and the wasting rate a ten-day target requires.
Grade 11 Math problem set
Cheswick's UV Reactor: Dose, Transmittance, and Log Inactivation
A grade 11 problem set on ultraviolet disinfection, moving from exposure time and lamp aging to absorbance from transmittance and the survivors left after inactivation.
Grade 11 Math problem set
Cresswick Clearwell Disinfection: Chlorine Dose and CT Math
A grade 11 problem set on chlorine demand, the pounds formula, contact time, and CT values in a fictional plant's clearwell, with equations for a required residual.
Grade 11 Math problem set
Ellersby's Lead Samples: The 90th Percentile and the Action Level
A grade 11 statistics problem set where students rank a fictional system's lead samples, find the 90th percentile, and compare it to the current and 2027 action levels.
Grade 11 Math problem set
Harwick's Pumping Bill: Energy, Efficiency, and Cost per Gallon
A grade 11 problem set where students turn a fictional utility's flow, head, and pump efficiency into daily energy, annual cost, and the savings from an upgrade.
Grade 11 Math problem set
Tamsin Reservoir Drawdown: A Drought Water-Budget Set
A grade 11 problem set on a fictional reservoir's drought drawdown, converting MGD to acre-feet and solving a linear storage equation for the days to an emergency level.
Grade 12 Math problem set
Dellacre Farm Irrigation Demand: Net, Gross, and Efficiency
A grade 12 problem set on irrigation water math: students convert crop needs to acre-feet, apply system efficiency to find gross demand, and size the delivery flow.
Grade 12 Math problem set
Highmarsh Reservoir Water Budget and Days of Supply
A grade 12 science problem set on a fictional reservoir: students move between acre-feet, gallons, and MGD to find net drawdown and how many days of supply remain.
Grade 12 Math problem set
Kingsley Cove Brackish RO: Recovery and Mass Balance
A grade 12 problem set on a fictional reverse-osmosis plant, finding recovery, salt rejection, a brine mass balance, concentration factor, and daily treatment energy.
Grade 12 Math problem set
Primary Clarifier Detention and Overflow at Netherford
A grade 12 science problem set sizing a fictional primary clarifier: volume, detention time, surface overflow rate, BOD removal, and the pounds of BOD removed per day.
Grade 12 Math problem set
Mid-Section Gauging on the Denbrook and a Withdrawal Limit
A grade 12 science problem set in which students compute stream discharge from nine measured verticals, then test a town's intake against two permit conditions.
Grade 12 Math problem set
Pinehaven Watershed Water Budget: Precipitation to Supply
A grade 12 problem set turning a fictional watershed's rainfall into acre-feet and gallons, then splitting it into evapotranspiration, runoff, and recharge.
Grade 12 Math problem set
Sizing a Bioretention Cell at Redmarch Commons
A grade 12 science problem set that takes a redevelopment site from percent impervious to a treatment volume, a cell footprint, a drawdown time, and a solids load.
Grade 9 Math problem set
Elmcrest Storage Tank: Fire Flow, Reserve, and Volume
A grade 9 problem set where students model a fictional town's cylindrical tank, find its volume in gallons, and track how much water a two-hour fire flow draws down.
Grade 9 Math problem set
Fallowmere's River Intake: From Stream Flow to Plant Capacity
A grade 9 problem set converting river flow among cfs, MGD, and gpm at a fictional town's intake, then testing a withdrawal limit against summer low flow.
Grade 9 Math problem set
Pump Station Horsepower at Haldane: A Grade 9 Energy Problem Set
A grade 9 problem set where students find water horsepower, brake horsepower, motor power, and the daily energy cost of a fictional high-service pump station.
Grade 9 Math problem set
Orrick Treatment Plant: Detention Time and Filter Loading
A grade 9 problem set where students find a sedimentation basin's detention time and a sand filter's loading rate for a fictional treatment plant.
Grade 9 Math problem set
Pinehaven Well: Drawdown, Specific Capacity, and Safe Yield
A grade 9 problem set where students use a fictional town well's water levels to find drawdown and specific capacity, then set up equations for safe pumping yield.
Grade 9 Math problem set
Seawater Desalination at Sable Coast: A Reverse Osmosis Problem Set
A grade 9 problem set where students find recovery, salt rejection, and the daily energy and cost of a fictional seawater reverse-osmosis plant.
Grade 9 Math problem set
Gullwing Ridge Pump Station: Flow, Head, and Drawdown Math
A grade 9 careers math set where students do a distribution operator's calculations for one pump station: drawdown, pressure and head, flow conversions, and fill time.
Grade 10 Math problem set
Halcyon Springs Brackish RO Pilot: Recovery and Rejection Problems
A grade 10 engineering math set on a fictional brackish reverse-osmosis pilot: percent recovery, salt rejection, a concentrate mass balance, and energy use.
Grade 10 Math problem set
Vireo Landing Filtration Plant: Sizing Basins and Filters
A grade 10 engineering math set that sizes a fictional plant's sedimentation basin and filters, checking detention time and filter loading against standard design ranges.
Grade 11 Math problem set
Halden Ridge Booster Pumps: Head, Flow, and Pressure Problems
A grade 11 engineering set on the fictional Halden Ridge booster station, where students find total dynamic head, read a pump curve, and check delivered pressure.
Grade 11 Math problem set
Tarnbrook Brackish RO Pilot: Recovery, Rejection, and Energy Problems
A grade 11 engineering set on the fictional Tarnbrook brackish-water RO pilot, covering percent recovery, salt rejection, a mass balance, and specific energy use.
Grade 12 Math problem set
Gullwing Bay Desalination Plant: Recovery, Rejection, and Energy Math
A grade 12 reverse-osmosis problem set where students track flow and salt through a fictional seawater plant, finding recovery, salt rejection, and daily energy use.
Grade 12 Math problem set
Kingsley Bend Plant Chlorine Feed: Pounds-Formula and Demand Problems
A grade 12 problem set on chlorine disinfection at a fictional plant: students apply the pounds formula, find chlorine demand, and set a feed to hit a target residual.
Grade 12 Math problem set
Vantage Mesa Raw-Water Pump Main: Flow, Velocity, and Sizing Problems
A grade 12 engineering problem set on a fictional raw-water pump main: students convert MGD to gpm and cfs, then use continuity to size the discharge pipe.
Grade 9 Math problem set
Ash Creek Treatment Plant: Detention, Filters, Chlorine
A grade 9 engineering set on a surface water plant: students size a sedimentation basin's detention time, a filter loading rate, and a chlorine feed in pounds per day.
Grade 9 Math problem set
Birch Hollow Pump Station: Head, Pressure, and Flow Problems
A grade 9 engineering problem set on a booster pump station: students find total dynamic head, discharge pressure, flow conversions, and tank fill time.
Grade 9 Math problem set
Marsh Landing Seawater Reverse Osmosis: Recovery and Flux
A grade 9 engineering set on a seawater reverse osmosis plant: students find permeate and concentrate flows, membrane flux, a concentration factor, and daily energy.
Grade 10 Math problem set
Whitmore Bend Plant Chlorine Dosing: A Grade 10 Pounds-Formula Set
A grade 10 math set sizing chlorine disinfection at a fictional plant: the pounds formula, chlorine demand, flow conversions, and clearwell contact time.
Grade 11 Math problem set
Corbett Springs Plant: Detention, Filter Loading, and Chlorine Math
A grade 11 math set sizing the fictional Corbett Springs treatment plant: basin volume, detention time, filter loading rate, and a chlorine feed calculation.
Grade 10 Math problem set
Kettlebrook's Aging Water Main: A Leak-Loss Problem Set
An 8-problem grade 10 set where students track gallons and cost lost to a leaking water main, chaining unit conversions from gallons per minute to acre-feet.
Grade 10 Math problem set
Redwing Filtration Plant: Filter Loading and Turbidity Removal
An 8-problem grade 10 set where students calculate filter loading rate and turbidity removal efficiency, checking results against real EPA compliance limits.
Grade 10 Math problem set
Talus River Well Field: Pumping and Tank Fill-Time Problems
A grade 10 math problem set where students use the continuity equation and cylinder volume formula to size pipe flow and tank fill time for a well field.
Grade 12 Math problem set
Sterling Hollow Chlorine Dosing: Operator-Certification Math
A grade 12 problem set chaining the pounds formula and the percent-to-mg/L conversion to size a hypochlorite feed pump at a fictional treatment plant.
Grade 11 Math problem set
Ashcombe Plant Expansion: Filter Loading Rate and Area Design
Grade 11 students convert a fictional plant's flow to gallons per minute and design a filter's minimum surface area that satisfies its loading-rate constraint.
Grade 10 Math problem set
Sawtooth Ridge Booster Pump Station: Flow and Pressure Problems
A grade 10 engineering math set sizing a booster pump station for a fictional hillside subdivision, chaining flow, pipe-velocity, and pressure-head conversions.
Grade 9 Math problem set
Larkspur Flats Well Drawdown: A Grade 9 Linear Equations Problem Set
Eight algebra problems that model a subdivision's groundwater well as a linear equation, using drawdown rate, a safety shutoff, and unit conversions.
Labs & experiments
Grade 12 Lab / experiment
Boil-Down Lab: Why Boiling Concentrates Nitrate and Lead in Water
A grade 12 health lab where students boil a salt solution, track volume and dissolved solids with a TDS meter, and explain why boiling cannot remove nitrate or lead.
Grade 10 Lab / experiment
Settling Column Test: A Grade 10 Sedimentation Design Lab
A grade 10 lab where students test how a coagulant changes how fast cloudy water clears, then connect the result to sedimentation basin design.
Grade 11 Lab / experiment
Aldwyn Reservoir Jar Test: Finding the Optimal Alum Dose
A grade 11 lab where students run a five-jar coagulation test on cloudy water, plot clarity against alum dose, and scale the best dose to a plant feed rate.
Grade 12 Lab / experiment
Bench-Testing a Small Pump: Building a Head-Capacity Curve
A grade 12 lab where students measure a small pump's flow at increasing discharge heights, plot the head-capacity curve, and estimate shutoff head from the graph.
Grade 9 Lab / experiment
Brackwell Creek Jar Test: Finding the Best Coagulant Dose
A grade 9 lab where students run a coagulation jar test on turbid water, compare alum doses, and find the dose that clears the water best before it settles.
Grade 10 Lab / experiment
Clearing Cloudy Water: A Coagulation and Flocculation Jar Test
A grade 10 lab where students add different alum doses to muddy water, run a jar test, and rate how coagulation and settling change water clarity.
Grade 10 Lab / experiment
Counting Water Drops on a Coin: A Surface-Tension Lab
A grade 10 lab where students count how many drops of plain and soapy water a coin holds, then use the results as evidence of water's hydrogen bonding.
Grade 10 Lab / experiment
Why Lakes Warm Slowly: A Water Specific-Heat Mixing Lab
A grade 10 lab where students mix measured hot and cold water, predict the final temperature with a weighted average, and link it to water's high specific heat.
Grade 11 Lab / experiment
Brindle Settling Column: Measuring Settling Velocity
A grade 11 lab measuring how fast coarse and fine sediment settle in a water column, linking settling velocity to clarifier design and river deposition.
Grade 11 Lab / experiment
Lindmere's Taste-and-Odor Problem: A Carbon Dose Adsorption Lab
Grade 11 students dose colored water with activated carbon at four levels, compare it with a sand control, and turn their removal data into a full-scale carbon feed rate.
Grade 11 Lab / experiment
Mixing Warm and Cool Water: A Thermal Energy and Oxygen Lab
A grade 11 lab where students mix warm and cool water, predict the final temperature from an energy balance, and connect it to reservoir layering and fish oxygen.
Grade 12 Lab / experiment
Conductivity as a Salinity Proxy: A Calibration Lab
A grade 12 lab building a calibration line between salt concentration and a meter reading, then estimating a fictional reservoir sample's salinity from it.
Grade 11 Lab / experiment
Head Versus Flow: A Presque Storage-Tank Orifice Lab
A grade 11 lab where students measure how outflow from a tank changes with water height, then fit the head-versus-flow pattern and link it to distribution pressure.
Grade 12 Lab / experiment
Build and Test a Bench-Scale Sand Filter: Loading Rate and Clarity
A grade 12 engineering lab where students build a sand filter column, measure its flow, and compute the loading rate in gpm per square foot against the design range.
Classroom activities
Grade 9 Classroom activity
Wickhollow Main Break: A Valve Isolation Simulation
A 45-minute grade 9 activity where crews of students isolate a break on a fictional water main, count customers cut off, and size the flushing and disinfection work.
Grade 11 Classroom activity
Eastmere Bay Nutrient Trading Floor: Cutting a Load at Least Cost
A 60-minute grade 11 activity where three teams trade phosphorus reduction projects across a watershed cap and then find the least expensive package that meets it.
Grade 12 Classroom activity
Glenrowe Water Age Relay: Tracing Travel Time Through Mains
A 50-minute grade 12 team relay in which students convert flows to velocities, compute pipe travel times, and find which node holds the oldest water.
Grade 9 Classroom activity
Northmill Meter Route: Converting Meter Readings to Gallons per Day
A grade 9 station-rotation activity where teams read six fictional water meters, convert CCF to gallons per day, and rank which address the leak crew should visit.
Grade 9 Classroom activity
Sallowfield Farms Soil Moisture Rounds: A Six-Week Pivot Game
A grade 9 activity where teams run a fictional center-pivot field through six weekly rounds, holding stored soil water inside a band while applying as little as possible.
Grade 10 Classroom activity
Westhorne's Cross-Connection Hazard Hunt Stations
A 50-minute grade 10 station rotation where teams inspect six cross-connection sites, choose backflow assemblies, and calculate the pressures that drive backflow.
Grade 11 Classroom activity
Vellacott Lake's Mussels: Modeling How Fast a Lake Clears
A grade 11 activity where teams calculate the clearance time of a fictional lake invaded by filter-feeding mussels, then evaluate three management responses.
Grade 9 Classroom activity
Sallowford Pretreatment Inspectors: A Discharge Permit Role-Play
A grade 9 careers role-play where three-person teams inspect three fictional industries, compute each discharge load in pounds per day, and decide the permit action.
Grade 9 Classroom activity
Tanbury Water Lab: A Grade 9 Bench Technician Rotation
A grade 9 careers rotation through four benches of a fictional water laboratory, where student teams run turbidity, chlorine feed, reporting, and duplicate-check math.
Grade 9 Classroom activity
Westerholt Digester Night Shift: An Operator Log Relay
A grade 9 careers relay where crews work a fictional digester's night log, computing solids reduction, gas yield, and engine output before each call-out decision.
Grade 10 Classroom activity
Hobbleton Ridge Percolation Stations: Sizing a Drainfield
A grade 10 station rotation sizing a soil absorption field for a fictional rural school, from a percolation test through trench layout, reserve area, and tank volume.
Grade 10 Classroom activity
Vellamore Reverse Osmosis Troubleshooting Rounds
A grade 10 station rotation where teams read operating data from four fictional membrane trains, calculate flow and salt passage changes, and diagnose each fault.
Grade 11 Classroom activity
Wynndale Main Replacement: A Quantity Take-Off Workshop
A grade 11 estimating workshop in which teams build a unit-price bid for a water main replacement, then reprice it when field crews hit unexpected rock.
Grade 12 Classroom activity
Harrowgill Service Line Inventory and Replacement Sprint
Grade 12 teams classify service line records at four stations, then size the crews, budget, and schedule a fictional district needs to replace lead lines.
Grade 12 Classroom activity
Vennacott Phosphorus Permit: A Nutrient Removal Charrette
Grade 12 teams rotate through three design desks, price chemical against biological phosphorus removal for a fictional plant, and defend one recommendation.
Grade 10 Classroom activity
Cranemoor Tiered-Rate Infographic: A Grade 10 Design Charrette
A grade 10 design charrette where teams build and vote on infographics that explain a fictional water district's tiered rates, scaling a stepped bar to the prices.
Grade 10 Classroom activity
Nettle Brook Watershed Mural: A Grade 10 Grid-Enlargement Relay
A grade 10 team activity where students enlarge a watershed master drawing onto a wall grid with the grid method, calculating scale factor and finished size.
Grade 11 Classroom activity
Brackenhill Filter Section: A Scale Drawing Relay
Teams of four build a large cross-section of a fictional plant's sand filter on butcher paper, adding one layer per round at a single stated scale.
Grade 11 Classroom activity
Ravensford Reclamation Tour: Wayfinding Sign Stations
Four rotating stations in which grade 11 students size signs, draw pictograms, and scale a route map for a fictional reclaimed water plant's public tour.
Grade 10 Classroom activity
Torres Household Water-Use Audit: A Fixture Station Rotation
A grade 10 station activity where students audit a fictional household's daily water use fixture by fixture, then compute simple conservation savings.
Grade 11 Classroom activity
Fix-a-Leak Station Rotation: Ranking Household Water Waste
A grade 11 station-rotation activity where teams calculate and rank the yearly water wasted by four fictional household leaks and choose the top fix.
Grade 9 Classroom activity
Reduce Lead at the Tap: A Grade 9 Home-Action Station Rotation
A grade 9 station rotation where students compare tap-lead readings, flush-water use, and filter costs to rank home actions against the lead action level.
Grade 9 Classroom activity
Virtual Water in Two Dinner Menus: A Grade 9 Footprint Activity
A grade 9 small-group activity where students build two dinner menus from food cards and total the hidden water behind each, comparing a beef dinner and a bean dinner.
Grade 10 Classroom activity
Briarcliff Creek PFAS Spill: A Contamination Response Relay
A grade 10 station-rotation activity where teams calculate dilution, travel time, and treatment effectiveness for a fictional PFAS spill nearing a water intake.
Grade 11 Classroom activity
Reading Your Water: A Household Water Quality Report Rotation
A grade 11 station-rotation activity where students compare a household's water quality report readings against real regulatory standards and choose a home water action.
Projects
Grade 10 Project
Duncannon Elevated Tank: A Storage and Pressure Design Project
A four-session grade 10 project where teams size an elevated tank for a fictional town to meet storage, pressure-range and budget limits at low cost.
Grade 10 Project
Fernbrook High Rainwater Cistern: A Sizing Design Project
Grade 10 teams size a 3,000-gallon rainwater cistern for a fictional school, pricing the tank by its surface area to meet a $5,000 budget and a 12-foot pad.
Grade 12 Project
Sandalford's New Water Source: Desalination, Reuse, or Conservation
A grade 12 project where teams test desalination, reuse, conservation and a hybrid against supply and budget inequalities, then recommend one to a board.
Grade 9 Project
Whitmoor Creek Dam: A Repair, Retrofit, or Removal Study
A grade 9 project where teams model twenty-year costs for three options at a fictional mill dam and recommend one to a river district board.
Grade 10 Project
Kessling County Aquifer Cross-Section: A Two-Ink Illustration Project
Grade 10 teams design a two-ink aquifer cross-section for a fictional county well guide, choosing a vertical exaggeration, layer patterns, an inset, and captions.
Grade 10 Project
Cawsley Orchards' Allotment: An Irrigation Technician Project
A grade 10 careers project where teams work as irrigation technicians, sizing a season water plan for four orchard blocks under an allotment and a retrofit budget.
Grade 10 Project
Tannoch Lake Hydro: Planning an Operator's Generation Week
A grade 10 careers project in which teams work as hydro station operators, planning a week of generation within lake level, fish flow, and turbine limits.
Grade 11 Project
Varnwell's Pumping Schedule: Least Cost Under a Time-of-Use Tariff
A four-session grade 11 project where teams build an hourly tank balance, design a 24-hour pumping schedule under storage limits, and defend its cost to a board panel.
Grade 9 Project
The Aldwinter High Water Audit: Finding the Standing Leak
A four-session grade 9 project where students meter their school's overnight water use, test one low-cost fix, and propose retrofits to a fictional facilities director.
Grade 11 Project
Cindermoss Creek Mine Drainage: A Passive Treatment Design
A six-session grade 11 project: teams design a gravity-driven treatment train for an abandoned mine discharge, sized by iron loading and limited by land and budget.
Grade 9 Project
Coppleston County's Small Water Systems: A Consolidation Study
A five-session grade 9 project in which teams map six fictional county water systems, compare bill burdens, and recommend whether to form a regional authority.
Grade 10 Project
Torro Mesa Lead Line Campaign: A Grade 10 Design Project
A grade 10 art project where teams design a public-awareness campaign about lead service lines for a fictional town, within a budget, and present it to a water board.
Grade 11 Project
Ashgrove Water Museum: A Three-Panel Exhibit Design
Over four sessions, grade 11 teams design three exhibit panels for a fictional town water museum, working to fixed panel sizes, type minimums, and a print allowance.
Grade 9 Project
Two Faces of Nutrients: A Grade 9 Museum Exhibit Panel Project
Grade 9 teams design a three-panel museum exhibit showing nutrients as both resource and pollutant, with an honest dissolved-oxygen chart and a design rationale.
Grade 11 Project
Ledgemont Wastewater Plant: A Phosphorus Removal Upgrade
A grade 11 engineering project where teams design a phosphorus removal upgrade for a fictional wastewater plant, sizing a chemical feed system within a budget.
Grade 9 Project
Cravenmoor Ridge After the Fire: A Backup Water Supply Design
A five-session grade 9 project where students design a backup supply for a fictional mountain water district under a fixed budget and a minimum pressure requirement.
Grade 10 Project
Hollowdale Farm Irrigation Water Budget Design Project
A grade 10 project where teams design a season's irrigation plan for a fictional 40-acre field, comparing flood and drip efficiency to fit a water and equipment budget.
Grade 10 Project
Tarnbury Pressure Zones: Designing for 40 to 80 psi on a Hillside
A five-session grade 10 project where teams divide a fictional hillside town into pressure zones, size each zone's tank, and defend the plan against a capital budget.
Grade 11 Project
Wexford's Lost Water: A Non-Revenue Water Audit Project
A grade 11 multi-session project auditing a fictional utility's water loss, fitting a trend line to monthly leakage and weighing a repair program against lost revenue.
Grade 12 Project
Quarryhill Water Works: Non-Revenue Water Audit and Plan
A grade 12 four-session project where teams audit a fictional utility's water losses, value them, and propose a loss-reduction plan within a fixed budget.
Grade 9 Project
Ambervale Irrigation District: A Water Budget Project
A grade 9 project for the fictional Ambervale Irrigation District, where teams model a season of water use as a constraint system within an allocation and budget.
Grade 9 Project
Marrowfield's Water Loss: A Non-Revenue Water Reduction Project
A grade 9 project where teams audit a fictional utility's water loss, model savings with linear equations, and propose a repair plan within a fixed budget.
Grade 12 Project
Aquifer Storage and Recovery for the Lattimore Basin
A grade 12 science capstone in which students test whether winter surplus water can be stored underground, then defend a recommendation to a fictional agency board.
Quizzes & test questions
Grade 11 Quiz & test questions
Hollenmarsh Digester Operations: A Biosolids Operator Quiz
A grade 11 careers quiz on running anaerobic digesters at a water resource recovery facility, covering volume, detention time, solids loading, and biogas.
Grade 12 Quiz & test questions
Calderwyn Regional Water: Distribution Operator Exam Review
A grade 12 careers assessment on distribution licensing and operator exam math at a fictional district, with ten items and a fully worked key.
Grade 9 Quiz & test questions
Osterlin Water Lab: A Water Quality Analyst Certification Quiz
A 40-point grade 9 careers quiz on the laboratory analyst's job at a fictional certified water lab, covering titrations, dilutions, quality control, and custody records.
Grade 9 Quiz & test questions
Whelkmere Water Works: A Distribution Operator Skills Quiz
A 40-point grade 9 careers quiz on the distribution operator's job at a fictional hillside utility, mixing role questions with pressure, flow, and storage math.
Grade 10 Quiz & test questions
Thorncastle Main Replacement: A Construction Inspector Quiz
A grade 10 careers quiz on the water main construction inspector role, covering pipe volume, disinfection dosing, pressure testing, and trench quantity math.
Grade 10 Quiz & test questions
Vessenden Instrument Technician: Calibration and Signal Scaling
A grade 10 careers quiz on the water plant instrumentation technician role, covering calibration, 4-20 mA signal scaling, percent error, and alarm setpoints.
Grade 10 Quiz & test questions
Wrackley Stormwater Inspector: Runoff, Basins, and Outfalls
A grade 10 careers quiz on the municipal stormwater inspector role, covering the rational method, detention basin sizing, roof runoff, and illicit discharge response.
Grade 12 Quiz & test questions
Ashenholt Digester: Biosolids Loading and Energy Recovery Exam
A grade 12 exam on anaerobic digestion at a fictional facility, from solids loading and volatile solids destruction to biogas, electricity, and detention time.
Grade 12 Quiz & test questions
Thornquay Cross-Connection Hazards: A Backflow Control Exam
A grade 12 exam on backflow protection for a fictional district, mixing hazard classification with head-to-pressure and life-cycle cost calculations.
Grade 10 Quiz & test questions
Kilnbury Water Main Thrust Blocks: A Grade 10 Design Test
A grade 10 engineering unit test on thrust restraint: students find the force at a capped end and at a bend, then size the concrete block that holds the fitting.
Grade 11 Quiz & test questions
Harkin Row Campus Stormwater Retrofit: Design Assessment
A grade 11 engineering assessment on a campus stormwater retrofit, covering impervious area, runoff volume, bioretention storage, drawdown time, and cost per gallon.
Grade 12 Quiz & test questions
Grebe Point Lift Station: Wet Well and Force Main Test
A grade 12 quiz on a fictional lift station mixing multiple-choice and computation: wet well volume, fill and pump-down times, cycle time, and force main velocity.
Grade 9 Quiz & test questions
Dunhaven Water Storage and Distribution: A Unit Test
A grade 9 test on a fictional water system covering tank volume, pressure from head, demand conversion, and fire-flow reserve, with choice and computation items.
Grade 9 Quiz & test questions
Quennfield Plant Upgrade: A Design and Sizing Unit Test
A 35-point grade 9 unit test on a fictional plant upgrade, mixing criteria and constraint items with detention time, chemical feed, filter loading, and pressure math.
Grade 10 Quiz & test questions
Dunmarrow Treatment Wetland Quiz: Area, Loading, and Removal
A 30-point grade 10 quiz on a fictional constructed wetland covering area in acres, hydraulic loading rate, detention time, and pounds of BOD and nitrogen removed.
Grade 10 Quiz & test questions
Northgate Operator Math: A Water Plant Unit Test
A grade 10, 30-point unit test on operator math: pressure, flow conversions, the pounds formula, tank volume, and detention time at a fictional water plant.
Grade 10 Quiz & test questions
Silverton Standpipe Geometry and Hydraulics Quiz
A 30-point grade 10 quiz mixing multiple choice, computation, and short answer on cylinder volume, pressure from height, and continuity for a fictional water district.
Grade 10 Quiz & test questions
Stonebridge Falls Chlorination Quiz: Dose, Demand, and pH
A grade 10 quiz mixing multiple-choice, short-answer, and computation items on chlorine dosing, chlorine demand, and pH for a fictional town's treatment plant.
Grade 11 Quiz & test questions
Coalport Plant Process Math: A Grade 11 Treatment Unit Test
A 45-minute, 30-point grade 11 unit test mixing multiple-choice, short-answer, and computation items on treatment process math for a fictional plant.
Grade 11 Quiz & test questions
Marden Water District Bills: A Rates and Water-Use Quiz
A grade 11 quiz mixing multiple-choice, short-answer, and computation items on a fictional district's per-capita use, affordability, and rate growth.
Grade 12 Quiz & test questions
Cranmoor Water District Finance and Infrastructure Test
A grade 12 unit test on water infrastructure and utility finance, mixing recall of real US figures with cost math for a fictional water district.
Grade 12 Quiz & test questions
Marston Regional Water: Hydraulics and Distribution Test
A grade 12 unit test mixing multiple-choice, short-answer, and computation items on pressure, head, tank volume, and pipe flow for a fictional regional water system.
Grade 12 Quiz & test questions
Whitmarsh Basin Yield: A Watershed and Runoff Unit Test
A 45-minute, 40-point grade 12 test on a fictional basin: converting runoff depth to acre-feet and MGD, then reading average rates of change from a storage table.
Grade 9 Quiz & test questions
Corriemoor Brook Storm Week: Flow Rates and Conversions
A grade 9 quiz on six days of fictional gauge readings, covering average rate of change, conversions among cfs, gpm, and MGD, and reading a storm rise.
Grade 9 Quiz & test questions
Glenmara Treatment Plant: A Process Math Quiz
A grade 9 unit quiz on the fictional Glenmara plant, with computation and multiple-choice items on detention time, filter loading, removal efficiency, and dosing.
Grade 9 Quiz & test questions
Kestrel Bend Water Plant: A Grade 9 Treatment Math Quiz
A 30-point grade 9 quiz mixing multiple-choice, short-answer, and computation items on dosing, detention time, removal efficiency, and pressure at a fictional plant.
Grade 9 Quiz & test questions
Varmoor Utility Operations Math: A Grade 9 Unit Test
A grade 9 unit test on the fictional Varmoor utility, mixing multiple-choice, short-answer, and computation items on the pounds formula, flow conversions, and pressure.
Grade 10 Quiz & test questions
Ashcombe River Basin: A Water Cycle and Earth Systems Quiz
A grade 10 science quiz mixing multiple-choice, short-answer, and computation items on residence time, water distribution, and Earth-system feedbacks.
Grade 10 Quiz & test questions
Brightwater Utility Operations: A Grade 10 Unit Test
A 30-minute grade 10 unit test on the fictional Brightwater Utility, mixing multiple-choice, short-answer, and computation items on disinfection, turbidity, and pressure.
Grade 10 Quiz & test questions
Maplewood Stormwater Runoff and Green Infrastructure Quiz
A grade 10 quiz on stormwater where students apply the rational method and roof-runoff formula and evaluate green infrastructure for a fictional district.
Grade 10 Quiz & test questions
Northaven Plant Barriers: A Pathogen and Disinfection Quiz
A 50-point grade 10 quiz on waterborne pathogens, treatment barriers, contact time, log removal, and the criteria a plant must meet before declaring water safe.
Grade 11 Quiz & test questions
Kellsworth Basin Water Cycle: A Watershed Budget Unit Test
A grade 11 unit test on the water cycle and a fictional watershed's budget, mixing multiple-choice, short-answer, and computation items on flows, storage, and recharge.
Grade 11 Quiz & test questions
Morrant Well PFAS Treatment: Removal and Regulation Quiz
A grade 11 science quiz on PFAS chemistry, the 4.0 ppt limit, and treatment, mixing multiple-choice, computation, and evaluation items around a fictional town's well.
Grade 11 Quiz & test questions
Ripplebrook Estuary Unit Test: Salinity, Oxygen, and Nutrients
A 50-point grade 11 unit test on estuary stratification, summer oxygen loss, and nitrogen loading, mixing multiple choice, computation, and an extended evaluation item.
Grade 11 Quiz & test questions
Westmere Water Chemistry Unit Test: Quality and Treatment
A 30-point grade 11 unit test on a fictional utility's water chemistry, mixing multiple-choice, short-answer, and computation items on quality parameters and treatment.
Grade 12 Quiz & test questions
Brockhurst Plant: Disinfection and Treatment Unit Test
A grade 12 unit test with multiple-choice, short-answer, and computation items on turbidity, chlorine dosing, removal efficiency, and detention time.
Grade 12 Quiz & test questions
Halbrook Water District: A Drinking-Water Standards Unit Test
A grade 12 science unit test on drinking-water standards, mixing multiple choice, short answer, and chlorine-dose computation for a fictional water district.
Grade 12 Quiz & test questions
Woldmere Regional: A Wastewater and Receiving Water Test
A grade 12 science unit test worth 50 points on wastewater unit processes, loading and detention calculations, and how a discharge affects oxygen in the receiving stream.
Grade 9 Quiz & test questions
Sturgeon Lake Nutrients: A Grade 9 Eutrophication Unit Test
A grade 9 test on nutrients as pollutant and resource, mixing multiple-choice, short-answer, and pounds-formula computation around a fictional lake's nutrient loading.
Grade 9 Quiz & test questions
Verdon Water Quality Unit Test: Treatment and Standards
A grade 9 unit test on drinking-water treatment and quality standards, mixing multiple-choice, short-answer, and computation items at a fictional town's plant.
Grade 9 Quiz & test questions
Water-Sector Careers Unit Test: Roles, Pathways, and Math
A grade 9 careers unit test mixing multiple-choice, short-answer, and computation items on water-sector roles, education pathways, workforce data, and operator math.
Grade 11 Quiz & test questions
Vesper Flats Utility: A Grade 11 Water Engineering Unit Test
A grade 11 engineering assessment mixing multiple-choice, short-answer, and computation items on treatment-train design, detention time, chlorine dosing, and pressure.
Grade 12 Quiz & test questions
Redmarsh Plant Operations Exam: Operator Math and Unit Conversions
A grade 12 engineering unit test on plant operations math, mixing multiple-choice, short-answer, and computation items set at a fictional treatment plant.
Grade 9 Quiz & test questions
Sable Point Water System: Treatment and Hydraulics Test
A grade 9 engineering unit test worth 30 points, mixing multiple-choice, short-answer, and computation items on head, pressure, flow, detention, filters, and removal.
Grade 10 Quiz & test questions
Quarrywood Plant Operations: A Grade 10 Conversions Unit Test
A grade 10 math unit test on a fictional plant: multiple-choice and computation items on the pounds formula, basin volume, detention time, and conversions.
Grade 12 Quiz & test questions
Sourwood Plant Certification Exam: Multi-Step Operator Math Practice
A grade 12 certification-style practice exam covering chained unit conversions, the pounds formula, tank volume, and detention time for a fictional treatment plant.
Career spotlights
Grades 10–11 Career spotlight
Water Treatment Operator: License Ladder, Pay, and Career Path
A high school career spotlight on water treatment operators, covering the license ladder, shift-work trade-offs, real BLS pay figures, and an overtime-pay exercise.