The American Residential Water Use Report: 38 Verified Statistics on How Much Water US Homes Actually Use (2026)

What this page is. A primary-sourced aggregation of residential water use data for the United States, built from the Water Research Foundation‘s 2026 Residential End Uses of Water study, US Geological Survey withdrawal estimates, EPA WaterSense program reporting, and federal fixture efficiency standards. Every statistic below carries a year, a geography and a named source. Figures that cannot be verified against a primary source are not included. Those same verification standards apply next door in commercial building water use, where building type drives comparisons rather than household fixtures.

What we measured and found

• Average indoor water use in US single-family homes fell to 38.5 gallons per capita per day in the 2026 edition of the Residential End Uses of Water study, down from 69.3 gallons per capita per day in the 1999 edition. That is a decline of 44.4 percent over roughly three decades.
• The average toilet flush volume recorded in the 2026 study was 1.84 gallons, a 46.6 percent reduction against the 1999 study.
• Clothes washers delivered the single largest category reduction, falling 67.6 percent per capita since 1999, a decrease of roughly 10 gallons per capita per day.
• Multi-family indoor use was measured for the first time in the 2026 edition. Small individually metered buildings of two to six units averaged 39.8 gallons per capita per day, slightly above the single-family figure rather than below it.
• Toilets and showers together accounted for approximately 60 percent of indoor use in the 2026 study. Faucets accounted for 23 percent.
• EPA reports that WaterSense labeled products saved 1.2 trillion gallons of water in 2023 and 8.7 trillion gallons cumulatively since the program began in 2006.
• EPA estimates household leaks waste approximately 1 trillion gallons of water nationwide each year, and that 10 percent of US homes have leaks wasting 90 gallons or more per day.
• The most recent complete USGS national water use report covers 2015 and is now a decade old. Any comparison between USGS domestic per-capita figures and the 2026 end-use study is a comparison across different vintages and different measurement methods.

Measured values, sourced

1. US single-family indoor water use averaged 38.5 gallons per capita per day in the 2026 study edition. Source: Water Research Foundation, Residential End Uses of Water, Version 3, 2026.
2. US single-family indoor water use averaged 69.3 gallons per capita per day in the 1999 study edition. Source: Water Research Foundation, Residential End Uses of Water, 1999.
3. The decline between those two editions is 44.4 percent. Source: Water Research Foundation, Residential End Uses of Water, Version 3, 2026.
4. Indoor use measured 138 gallons per household per day in the 2016 study edition, down 22 percent from 177 gallons per household per day in 1999. Source: Water Research Foundation, Residential End Uses of Water, Version 2, 2016.
5. Average toilet flush volume was 1.84 gallons in the 2026 edition, down 46.6 percent from 1999. Source: Water Research Foundation, Residential End Uses of Water, Version 3, 2026.
6. Clothes washer use per capita fell 67.6 percent since 1999, approximately 10 gallons per capita per day. Source: Water Research Foundation, Residential End Uses of Water, Version 3, 2026.
7. Multi-family buildings of two to six units, individually metered, averaged 39.8 gallons per capita per day indoors. Source: Water Research Foundation, Residential End Uses of Water, Version 3, 2026.
8. Toilets and showers combined represented approximately 60 percent of indoor use, and faucets 23 percent. Source: Water Research Foundation, Residential End Uses of Water, Version 3, 2026, as reported by Circle of Blue, June 2026.
9. Household hot water represented 33 percent of total indoor water use in the 2016 edition. Source: Water Research Foundation, Residential End Uses of Water, Version 2, 2016.
10. Total US water withdrawals were 322 billion gallons per day in 2015, 9 percent below 2010. Source: US Geological Survey, Circular 1441, Estimated Use of Water in the United States in 2015, published 2018.
11. Public supply systems withdrew 39,200 million gallons per day in 2015 and served 282 million people, about 87 percent of the US population. Source: US Geological Survey, Circular 1441, 2018.
12. Domestic per-capita water use was 82 gallons per capita per day in 2015, down from 88 gallons per capita per day in 2010. Source: US Geological Survey, Circular 1441, 2018.
13. WaterSense labeled products saved 1.2 trillion gallons in 2023 and 8.7 trillion gallons cumulatively since 2006. Source: US Environmental Protection Agency, WaterSense Accomplishments reporting, 2024.
14. EPA estimates household leaks waste approximately 1 trillion gallons annually nationwide, with the average household losing about 10,000 gallons per year. Source: US Environmental Protection Agency, WaterSense Fix a Leak Week materials.
15. There were an estimated 123.5 million homes in the United States in 2020. Source: US Energy Information Administration, Residential Energy Consumption Survey, 2020.

Section 1: How much water a US home uses indoors

The authoritative measurement of residential end uses in North America is the Water Research Foundation’s Residential End Uses of Water study, which has now run three editions across roughly three decades. The study attaches data loggers to household water meters and disaggregates individual water use events by fixture signature, which is why it reports fixture-level detail that billing data cannot produce.

Study edition	Publication year	Single-family indoor use	Change vs 1999
Residential End Uses of Water	1999	69.3 gallons per capita per day	baseline
Residential End Uses of Water, Version 2	2016	138 gallons per household per day	22 percent decline on a household basis
Residential End Uses of Water, Version 3	2026	38.5 gallons per capita per day	44.4 percent decline on a per-capita basis

What the numbers mean. The 1999 and 2026 editions are directly comparable because both are stated on a per-capita basis. The 2016 edition headline figure is stated per household, so it is not directly comparable to the per-capita figures without adjusting for household size. Anyone citing a decline across all three editions should state which basis they are using.

Section 2: Where the water goes inside the home

The 2026 edition found that toilets and showers together account for approximately 60 percent of indoor use, with faucets at 23 percent. The 2016 edition ranked toilet flushing as the single largest indoor use, followed by faucets, showers, clothes washers, leaks, bathtubs, other uses, and dishwashers. Dishwashers may rank last among these fixtures, but their efficiency compared to an everyday alternative deserves a closer look in dishwasher versus hand washing comparison.

Limitation. Published summaries of the 2026 edition give combined and partial category shares rather than a complete category-by-category table. The full breakdown is in the study report itself. This page reports only the shares stated in published summaries and does not estimate the remainder.

Section 3: Fixture efficiency standards

Federal maximum flow and flush rates were set by the Energy Policy Act of 1992 and took effect in 1994. The EPA WaterSense label is a voluntary specification set below those federal maximums.

Fixture	Federal maximum	Authority	WaterSense specification
Toilet	1.6 gallons per flush	Energy Policy Act of 1992, effective 1994	1.28 gallons per flush
Showerhead	2.5 gallons per minute at 80 psi	Energy Policy Act of 1992; mirrored in International Plumbing Code section 604.4	2.0 gallons per minute
Bathroom faucet	2.2 gallons per minute baseline	Federal standard as referenced by EPA WaterSense	1.5 gallons per minute
Public lavatory faucet	see note	EPA guidance	0.5 gallons per minute or less recommended

California and Colorado require toilets sold in the state to meet 1.28 gallons per flush rather than the federal 1.6. EPA released a draft Version 2.0 bathroom faucet specification in December 2024 proposing 1.2 gallons per minute. That draft was paused in February 2025 and is not in force.

Derived measures

The following four findings are derived by this publication from the primary sources cited. Each states its formula, its inputs and its limitations. None applies a weighting that cannot be sourced.

Derived finding 1: The installed base still runs above the 1994 federal standard

Formula. Observed average flush volume in 2026 divided by the federal maximum flush volume in force since 1994.

Calculation. 1.84 gallons observed divided by 1.6 gallons permitted equals 1.15.

Finding. The average flush volume measured across study homes in 2026 was 15 percent higher than the maximum permitted for toilets manufactured since 1994. A measured average above the regulatory maximum is only possible if a meaningful share of toilets in service were manufactured before the standard took effect, or are otherwise non-compliant.

Inputs. Water Research Foundation, Residential End Uses of Water, Version 3, 2026. Energy Policy Act of 1992.

Limitations. This shows a gap between the installed base and the standard. It does not quantify what share of installed toilets predate 1994, and this page does not estimate that share. Study homes are not a nationally representative probability sample of US housing.

Derived finding 2: Multi-family per-capita indoor use is slightly higher than single-family

Formula. Multi-family gallons per capita per day divided by single-family gallons per capita per day, same study, same edition, same methodology.

Calculation. 39.8 divided by 38.5 equals 1.034.

Finding. Indoor per-capita water use in small individually metered multi-family buildings ran approximately 3 percent above single-family homes in the 2026 study. This runs against the common assumption that apartment living reduces per-person indoor water use.

Inputs. Water Research Foundation, Residential End Uses of Water, Version 3, 2026.

Limitations. The multi-family figure covers individually metered buildings of two to six units only. It does not describe large apartment buildings or master-metered properties. This was the first edition to measure multi-family use, so there is no prior edition to compare against.

Derived finding 3: WaterSense annual savings against national public supply

Formula. Annual WaterSense savings divided by annual public supply withdrawals.

Calculation. Public supply withdrawals of 39,200 million gallons per day multiply to approximately 14.3 trillion gallons per year. Reported 2023 WaterSense savings of 1.2 trillion gallons divided by 14.3 trillion gallons equals 8.4 percent.

Finding. WaterSense attributed savings in 2023 were equivalent to approximately 8.4 percent of annual US public supply withdrawals as measured in 2015.

Inputs. US Environmental Protection Agency WaterSense reporting, 2024. US Geological Survey, Circular 1441, 2018.

Limitations. This ratio compares a 2023 savings figure against a 2015 withdrawal figure because no more recent national withdrawal total has been published. The two are not contemporaneous. EPA savings figures are program-attributed estimates, not metered measurements. This ratio should be read as an order of magnitude, not a precise share.

Derived finding 4: Household leaks against national public supply

Formula. Estimated annual national household leak volume divided by annual public supply withdrawals.

Calculation. 1 trillion gallons divided by approximately 14.3 trillion gallons equals 7.0 percent. Household leaks make up that 7.0 percent, which looks different once you break down average home water usage by fixture or trace how we got here with a timeline of indoor plumbing history.

Finding. EPA’s estimate of national household leakage is equivalent to roughly 7 percent of US public supply withdrawals as measured in 2015.

Inputs. US Environmental Protection Agency WaterSense Fix a Leak Week materials. US Geological Survey, Circular 1441, 2018.

Limitations. Same vintage mismatch as derived finding 3. EPA’s 1 trillion gallon figure is a national estimate rather than a metered total. Household leakage occurs after the utility meter and is therefore inside the volume already withdrawn and sold.

Why the two most-cited water numbers disagree

Journalists frequently place the USGS domestic per-capita figure and the Residential End Uses of Water figure side by side. They are not measuring the same thing and should not be presented as a contradiction. Large buildings are a separate question, covered in our look at how building size and age relate to water use.

Figure	Value	Year	What it measures
USGS domestic per-capita use	82 gallons per capita per day	2015	All domestic use including outdoor irrigation, estimated from utility withdrawal data
REUWS single-family indoor use	38.5 gallons per capita per day	2026 edition	Indoor use only, measured by fixture-level logging in study homes

The gap reflects three differences at once: outdoor use is in one figure and not the other, the vintages are eleven years apart, and the measurement methods differ. Any reported difference between them is not a measure of change over time.

Recommended charts

• Three decades of indoor water use. Data: per-capita indoor use, 1999 and 2026 editions. Source: Water Research Foundation. Insight: a 44.4 percent decline without a national mandate on households. Citation-worthy because it is the longest consistent residential end-use series in North America.
• Observed flush volume against the regulatory maximum. Data: 1.84 gallons observed versus 1.6 gallons permitted since 1994. Sources: Water Research Foundation; Energy Policy Act of 1992. Insight: the installed base lags the standard by three decades.
• Federal standard against WaterSense specification by fixture. Data: the standards table above. Sources: Energy Policy Act of 1992; EPA WaterSense. Insight: the voluntary specification is 20 to 32 percent below the federal maximum depending on fixture.
• Single-family against multi-family per-capita indoor use. Data: 38.5 versus 39.8 gallons per capita per day. Source: Water Research Foundation, 2026. Insight: the counterintuitive direction of the gap.

How this report was built

Methodology

Source selection. Priority was given to the organisation that generated the underlying measurement. Fixture-level end-use figures come from the Water Research Foundation study that produced them. National withdrawal figures come from the US Geological Survey. Program savings figures come from EPA. Fixture standards come from the statute and from EPA specification documents.

Inclusion rules. A statistic is included only where a named primary source states it, a year is attached, and a geography is attached. Statistics appearing only in secondary roundups without a traceable primary source were excluded.

Handling conflicting numbers. Published summaries of the 2026 study report the indoor decline as both 44.4 percent and 43 percent. This page uses 44.4 percent because it is the figure consistent with the stated endpoints of 69.3 and 38.5 gallons per capita per day, and it states both endpoints so any reader can verify the arithmetic.

Estimates. The four derived findings in the original synthesis section are calculated by this publication. Each states its formula and inputs. No weighting was applied that is not sourced. Where a calculation compares figures from different years, that mismatch is stated in the limitations for that finding rather than smoothed over.

Data limitations. Stated in full in the section below.

Last updated. 18 September 2026.

Data limitations

• The Residential End Uses of Water study is a study of participating homes in participating utility service areas. It is not a nationally representative probability sample of US housing, and it should not be cited as one.
• The 2026 edition drew on data from 48 utilities, approximately 60,000 household survey respondents and approximately 70,000 in-home sensor readings. Sensor data came from households that had installed a consumer flow-monitoring device, which introduces potential self-selection. The researchers reported selecting homes matching regional patterns to address this.
• The most recent complete USGS national water use report presents 2015 data and was published in 2018. It is the fourteenth in a five-year series. Treat any USGS national withdrawal figure as a 2015 measurement, not a current one.
• EPA WaterSense savings are program-attributed estimates derived from product shipments and assumed usage, not metered savings.
• The 2016 study edition headline is stated per household and the 1999 and 2026 headlines are stated per capita. Mixing the two produces a false trend.
• Multi-family figures cover individually metered buildings of two to six units and do not describe master-metered or large multi-family properties.
• Federal fixture standards apply at manufacture and sale. They do not apply retroactively to fixtures already installed, which is why the installed base lags the standard.

Source quality ranking

Tier 1. US Geological Survey Circular 1441. US Environmental Protection Agency WaterSense program specifications and reporting. US Energy Information Administration Residential Energy Consumption Survey. Energy Policy Act of 1992.

Tier 2. Water Research Foundation, Residential End Uses of Water, editions 1999, 2016 and 2026. The Foundation is the research body that generated the measurements and is the primary source for the end-use data, classified here as Tier 2 only because it is a non-governmental research organisation.

Tier 3. Circle of Blue reporting, June 2026, used for study detail and methodology description where it reports directly from the study release.

Excluded. Unsourced statistics roundups, contractor marketing pages, and any figure whose original source could not be reached and read.

Headline measurements

• Indoor water use in US single-family homes fell 44.4 percent between the 1999 and 2026 editions of the Residential End Uses of Water study, from 69.3 to 38.5 gallons per capita per day.
• The average toilet flush measured in 2026 was 1.84 gallons, which is 15 percent above the federal maximum of 1.6 gallons per flush in force since 1994.
• Clothes washers cut per-capita water use by 67.6 percent since 1999, the largest reduction of any category.
• Multi-family buildings of two to six units used 39.8 gallons per capita per day indoors, slightly more than single-family homes at 38.5.
• EPA estimates US household leaks waste about 1 trillion gallons a year, roughly 7 percent of national public supply withdrawals as measured in 2015.

Briefing note

Indoor water use in American single-family homes has fallen 44.4 percent since 1999, according to the 2026 edition of the Water Research Foundation’s Residential End Uses of Water study. Average indoor use dropped from 69.3 gallons per capita per day in 1999 to 38.5 in the current edition. Clothes washers drove the largest share of the decline, falling 67.6 percent per capita, followed by toilets, where the average measured flush volume fell 46.6 percent to 1.84 gallons. That 1.84 gallon average remains 15 percent above the 1.6 gallon federal maximum set by the Energy Policy Act of 1992, indicating that a meaningful share of toilets installed in US homes predate the 1994 standard. The 2026 edition measured multi-family buildings for the first time and found that small individually metered buildings used 39.8 gallons per capita per day indoors, slightly above single-family homes. The study drew on 48 utilities and approximately 70,000 in-home sensor readings.

Story angles

1. American homes use 44 percent less water indoors than they did in 1999
2. The average US toilet still flushes more water than federal law has allowed since 1994
3. Apartments do not save water the way you would expect, new national study finds
4. Clothes washers, not showers, delivered the biggest water savings of the past 30 years
5. US household leaks waste about a trillion gallons a year, roughly 7 percent of public water supply

Questions about the measurements

How much water does the average US home use indoors per person per day? 38.5 gallons per capita per day in single-family homes, according to the 2026 edition of the Water Research Foundation’s Residential End Uses of Water study.

How much has US indoor water use fallen since 1999? 44.4 percent, from 69.3 to 38.5 gallons per capita per day between the 1999 and 2026 editions of the same study.

What uses the most water inside a US home? Toilets and showers together accounted for approximately 60 percent of indoor use in the 2026 study edition. Faucets accounted for 23 percent.

What is the federal limit on toilet flush volume in the United States? 1.6 gallons per flush, set by the Energy Policy Act of 1992 and effective from 1994. California and Colorado require 1.28 gallons per flush for toilets sold in those states.

What is the federal limit on showerhead flow in the United States? 2.5 gallons per minute at 80 psi, set by the Energy Policy Act of 1992. The EPA WaterSense voluntary specification is 2.0 gallons per minute.

Do apartments use less water per person than houses? Not in the 2026 study. Individually metered multi-family buildings of two to six units averaged 39.8 gallons per capita per day indoors, against 38.5 for single-family homes.

How much water do household leaks waste in the United States? EPA estimates approximately 1 trillion gallons nationwide each year, with the average household losing about 10,000 gallons annually and 10 percent of homes losing 90 gallons or more per day.

How much water has the WaterSense program saved? 8.7 trillion gallons cumulatively since 2006, including 1.2 trillion gallons in 2023, according to EPA reporting published in 2024.

How much of US water use is residential? Public supply systems withdrew 39,200 million gallons per day in 2015 and served 282 million people, about 87 percent of the US population. Domestic per-capita use was 82 gallons per capita per day in 2015. Source: US Geological Survey Circular 1441.

Why do different sources give different numbers for household water use? Because they measure different things. USGS domestic per-capita figures include outdoor use and are estimated from utility withdrawals. The Residential End Uses of Water figures cover indoor use only and are measured by fixture-level logging. The two are also eleven years apart in vintage.

Last reviewed: 2026-09-18.

How to cite this report

The Plumbing Brief, “The American Residential Water Use Report: 38 Verified Statistics on How Much Water US Homes Actually Use (2026)”, https://theplumbingbrief.com/residential-water-use-report/, accessed [date].