The Rise of Water Metering and How We Pay for Water

When American cities first built public water systems, most charged customers a flat fee. A household paid a set amount each year for water service, and it paid the same whether it used a little or a great deal. The system was simple to administer, since no one had to measure anything, but it carried a hidden flaw. If using more water costs nothing extra, people have no reason to use less. Under flat fees, water left running was not the customer's financial problem, and waste was common.

The water meter changed that logic. A meter measures exactly how much water passes into a building, so a utility can charge for the amount actually used. Meters spread gradually through the late nineteenth and twentieth centuries, and they turned water into something closer to other goods people buy, where using more water meant paying more. That single change created an incentive to fix leaks, close taps, and think about consumption. Studies of cities that switched from flat fees to meters found that metered customers used noticeably less water than unmetered ones, simply because the cost of waste now landed on the person causing it.

Metering also raised a fairness question. A meter lets a utility recover its costs from the customers who actually use the water, rather than spreading the cost evenly across everyone. A small household no longer subsidizes a large one. Yet metering alone does not tell a utility how to set the price per unit, and that choice turned out to matter as much as the meter itself.

For most of the twentieth century, many utilities used declining-block rates, in which each additional unit of water cost less than the last. That structure suited an era focused on growth, when selling more water helped pay for the system. As droughts and supply limits grew more pressing, some utilities reversed the logic. They adopted tiered, or increasing-block, rates, in which the first block of water a household uses is priced low to cover basic needs, and later blocks cost more. The design sends a signal: essential use stays affordable, while heavy use, often outdoor irrigation, costs enough to make people reconsider it.

Pricing water well is harder than it sounds, because most of a water system's costs are fixed. The pipes, plants, and treatment must be paid for whether customers use a lot of water or a little. When conservation succeeds and people use less, revenue falls, but the fixed costs do not, so the utility must eventually raise its rates to stay solvent. Customers who conserve can still see their bills climb, which feels unfair and is difficult to explain. This is one reason water bills have been rising faster than inflation; combined water and sewer bills rose about 24 percent from 2019 to 2024 and about 5.1 percent more in 2025.

Rising bills collide with a limit on what households can pay. A widely used rule of thumb treats combined water and sewer costs above roughly 4.5 percent of household income as a high burden. The figure comes from adding two Environmental Protection Agency benchmarks, 2.5 percent for drinking water and 2 percent for wastewater, although the agency has no single official cutoff. Utilities must therefore design rates that do three things at once: cover fixed costs, encourage conservation, and keep water affordable for lower-income households. Those goals pull against one another, and no pricing structure satisfies all three perfectly. The history of water pricing, from flat fees to meters to tiers, is really a history of communities deciding, again and again, which of those goals to weigh most heavily.

1. Under a flat-fee system, why does the passage say waste was common?
2. According to the passage, what did the water meter change about how customers paid, and what behavior did that encourage?
3. Explain the difference between declining-block rates and tiered, increasing-block rates, and what signal each one sends to customers.
4. The passage says most of a water system's costs are "fixed." Using details from the passage, explain why that fact can cause a utility to raise rates even when customers conserve.
5. Why might a customer who conserves water still see a higher bill, and why does the passage say this is hard to explain?
6. Based on the figures in the passage on rising bills and affordability, describe the tradeoff utilities face when setting rates, and explain why no single pricing structure solves it.