Running water typically costs about $0.10-$3.00 per hour for common indoor fixtures, while a high-flow garden hose can cost $1-$10 or more per hour. The cost of running water per hour depends on flow rate, local water and sewer rates, and whether the utility charges for wastewater based on water use.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Kitchen faucet, per hour | $0.05 | $0.15 | $0.40 | About 1-2 gallons per minute (gpm) |
| Shower, per hour | $0.10 | $0.35 | $0.90 | About 1.5-2.5 gpm; hot-water energy not included |
| Garden hose, per hour | $0.40 | $2.50 | $9.00 | About 5-12 gpm, depending on pressure and nozzle |
| Toilet leak, per hour | $0.01 | $0.12 | $0.80 | Varies widely with leak size and local rates |
Illustrative estimates use a combined water and sewer rate of $15 per 1,000 gallons. Local rates can be substantially lower or higher, and monthly service charges are not included.
Typical hourly water charges for faucets, showers, and hoses
A useful baseline is $0.015 per gallon for water and sewer service together, equal to $15 per 1,000 gallons. At that rate, a fixture running at 1 gpm uses 60 gallons in an hour and costs about $0.90. The bill impact is not always that simple: sewer charges may be calculated differently, and utilities often add fixed monthly fees.
For ordinary indoor fixtures, the water itself usually costs cents to under a dollar per hour. A faucet flowing at 1.5 gpm uses 90 gallons per hour, or about $1.35 at the example rate. A 2-gpm shower uses 120 gallons, about $1.80 per hour for water and sewer. These figures exclude the energy needed to heat hot water.
A hose can use several times as much as a faucet. At 8 gpm, it uses 480 gallons in an hour, costing about $7.20 at $15 per 1,000 gallons. A nozzle, pressure regulator, or smaller hose may reduce flow, but the actual rate depends on the plumbing and water pressure.
Assumptions: Combined water and sewer price of $15 per 1,000 gallons; continuous flow for a full hour; no fixed fees or hot-water energy.
How water, sewer, and fixture flow shape the bill
Water utilities generally bill by volume, often in units of 100 or 1,000 gallons. Sewer service may be a separate volumetric charge or may be based on winter water use, a flat rate, or another local method. Check the current bill for both rates before estimating the cost of water left running.
| Quote component | Typical rate | What it covers | Hourly example |
|---|---|---|---|
| Water supply | $4-$12 per 1,000 gallons | Treatment and delivery, varying by utility | At 2 gpm, $0.48-$1.44 |
| Sewer service | $5-$20 per 1,000 gallons | Wastewater collection and treatment, when usage-based | At 2 gpm, $0.60-$2.40 |
| Fixed service fees | $10-$60 per month | Account, meter, or service charges | Not usually changed by one extra hour |
| Hot-water energy | $0.10-$0.60 per shower hour | Gas or electric water heating, depending on fuel and temperature | Separate from the water bill |
Rates in the table are broad U.S. examples, not a national tariff. Some areas charge higher sewer rates than water rates, while others use a flat wastewater fee. A garden hose used outdoors may still trigger sewer charges if the utility bills sewer based on all metered water, even though the water does not enter the sewer system.
For an accurate estimate, add the applicable per-gallon water and sewer rates, then multiply by the gallons used. A fixed monthly fee typically remains due whether water runs for an hour or not.
Flow rate and leak size change hourly use quickly
Flow rate is the main physical variable. A fixture’s label may list a maximum gpm, but pressure, age, and restrictions affect actual output. Measure a faucet by catching water in a container for a set time: one gallon collected in 30 seconds indicates about 2 gpm. The same method works for a hose if the container can be filled safely.
At 1 gpm, a running fixture uses 60 gallons an hour. At 2.5 gpm, it uses 150 gallons. A hose at 10 gpm uses 600 gallons in an hour. At the $15-per-1,000-gallon example rate, those amounts cost approximately $0.90, $2.25, and $9.00, respectively.
Fixture standards and condition matter. Many newer bathroom faucets are designed for about 1.2 gpm, while older models can exceed 2 gpm. Standard showerheads often flow around 2.0-2.5 gpm; water-saving models may be near 1.5-1.8 gpm. A partially open valve does not always reduce flow in direct proportion to how far the handle turns.
Leaks range from a slow drip to a toilet flapper that lets water run continuously. A drip may waste only a small amount per hour, but a toilet leak can waste hundreds of gallons daily. If a leak wastes 1 gallon per hour, the example combined rate puts its direct use at $0.36 per day, or about $11 per month. Small per-hour leak charges can become material when they continue around the clock.
Assumptions: Rate comparisons use $15 per 1,000 gallons; actual flow should be measured because fixture ratings are not guaranteed household output.
Does the hourly price vary by U.S. region?
Yes. Water and sewer rates are set by local utilities, so two homes using the same 100 gallons may pay different amounts. A combined charge of $8 per 1,000 gallons makes a 2-gpm fixture cost about $0.96 per hour; a $30 combined rate makes it $3.60. These estimates exclude flat charges and assume sewer billing follows metered water use.
Urban systems with extensive treatment or infrastructure costs may have higher bills, but location alone does not predict the rate. Some rural homes rely on a private well and septic system rather than municipal billing. In that case, running water may have low immediate utility cost, but the pump uses electricity and the well and septic systems require maintenance.
Utilities may also use increasing rate tiers. For example, usage above a monthly allowance might cost more per 1,000 gallons than the first block. A household already near a tier boundary may pay more for an extra hour than an average-rate estimate suggests. The utility’s marginal rate—the charge for the next unit of use—is the best rate for estimating extra consumption.
To find it, check the bill for separate water and sewer rates, tier thresholds, and fixed charges. If the bill lists only a total, divide variable charges by metered gallons for a rough combined rate. Do not include flat fees in that calculation when estimating the cost of one additional hour of flow.
Three running-water examples with real usage math
These examples use a combined volumetric rate of $15 per 1,000 gallons. The dollar amount changes in proportion to the local rate. A home paying $25 per 1,000 gallons, for instance, would multiply each example’s estimated charge by 25/15.
| Use case | Flow and duration | Water used | Estimated charge |
|---|---|---|---|
| Kitchen faucet left on | 1.5 gpm for 1 hour | 90 gallons | $1.35 |
| Shower running | 2 gpm for 20 minutes | 40 gallons | $0.60 |
| Garden hose watering | 8 gpm for 30 minutes | 240 gallons | $3.60 |
For a longer-running leak, multiply the hourly use by the hours it continues. A toilet leak using 2 gallons per hour wastes 48 gallons a day and about 1,440 gallons in 30 days. At the example rate, that is $21.60 monthly in volumetric water and sewer charges, if sewer billing tracks that water.
The estimate does not include a plumber’s diagnostic or repair fee. A straightforward toilet flapper replacement may cost $75-$200 when handled by a plumber, depending on service minimums and local labor; parts for a do-it-yourself repair may be $5-$25. A leak that requires valve or supply-line work can cost more. Compare the one-time repair price with the leak’s recurring bill impact and the risk of water damage.
Cut water costs by controlling run time and flow
The easiest savings come from avoiding unnecessary continuous flow. Turning off a faucet while brushing or washing dishes can reduce minutes of use without affecting the task. For outdoor watering, use a timer and check the hose’s measured gpm; reducing an 8-gpm hose to 4 gpm for 30 minutes saves 120 gallons each time.
For showers, compare flow before buying a replacement head. If an old showerhead uses 2.5 gpm and a new one uses 1.8 gpm, a 10-minute shower saves 7 gallons. At $15 per 1,000 gallons, that is about 11 cents per shower in water and sewer charges. Hot-water energy savings may be additional, especially where water heating is costly.
Repair running toilets and dripping fixtures promptly, but confirm the source first. A toilet dye test can reveal water moving from the tank into the bowl without flushing. For a suspected meter leak, shut off fixtures and check whether the meter continues to register use. If it does, isolate appliances and plumbing branches before assuming the leak is underground.
Prioritize fixes by gallons saved, not by the fixture’s appearance or advertised efficiency. Avoid replacing a working fixture solely to save a few cents unless frequent use, hot-water savings, or a local rebate changes the payback. A measured flow rate and the household’s actual utility rate make comparisons more useful than generic savings claims.
When a running-water charge signals a plumbing problem
A suddenly higher bill can reflect a leak, seasonal outdoor use, a rate increase, or a billing-period adjustment. Compare gallons used—not just the dollar total—with prior bills. A longer billing cycle or newly applied sewer charge can raise the amount even when household habits have not changed.
Continuous sound near a toilet, a moving water meter when fixtures are off, damp soil near a line, or unexplained pump activity can indicate a leak. Shut off the home’s main valve if water is causing damage, then contact a licensed plumber. Emergency visits may carry after-hours minimums of roughly $150-$400 before substantial repair work, depending on location and urgency.
For a slow, accessible fixture leak, a normal appointment may be less expensive than emergency service. Ask whether the quoted fee includes diagnosis, parts, labor, and return visits. If the leak is on the utility side of the meter, contact the water provider; responsibility and repair charges depend on local rules and the service-line boundary.
Some utilities offer leak adjustments after a documented repair, but eligibility and deadlines vary. Ask whether the adjustment applies to water, sewer, or both, and keep the repair receipt and unusually high bill. A leak adjustment may reduce a past bill, but it does not replace fixing the source.