Statistics & Data
Municipal Water Treatment Statistics 2026: Infrastructure, Cost & Coverage Gaps
Updated May 2026 · Research compiled from EPA, AWWA, USGS, BIL
Last Updated: May 2026
America's municipal water treatment infrastructure is aging, underfunded, and increasingly challenged by emerging contaminants like PFAS. With over 148,000 public water systems serving 93% of Americans, the scale of the treatment challenge is enormous — from lead pipe replacement to PFAS filtration to basic maintenance of century-old pipes. These statistics compile the latest data from the EPA, American Water Works Association, USGS, and federal infrastructure programs to document the state of municipal water treatment heading into 2026.
$1 Trillion
Estimated infrastructure investment needed over the next 25 years for U.S. water systems
— American Water Works Association, 2024
Infrastructure Scale & Funding Gap
148,000+
public water systems in the U.S., serving 93% of Americans
— EPA, 2024
$1T
estimated total investment needed over 25 years for drinking water infrastructure (AWWA)
— American Water Works Association, 2024
$55B
allocated by the Bipartisan Infrastructure Law (2021) for water, wastewater, and water reuse
— U.S. Congress, BIL 2021
$625B
proportion of AWWA's $1T estimate needed for distribution and transmission pipe replacement alone
— AWWA Buried No Longer Report, 2024
52%
of drinking water infrastructure investment gaps are concentrated in systems serving fewer than 10,000 people
— EPA Drinking Water Infrastructure Needs Survey, 2023
$24.6B
EPA Clean Water State Revolving Fund appropriations drawn down in FY2024 — still insufficient to close the gap
— EPA CWSRF Annual Report, 2025
7–10%
annual increase in municipal water rates needed simply to maintain current infrastructure condition
— AWWA State of the Industry Report, 2025
Aging Pipes & Water Main Breaks
9.2M
lead service lines still in use across the U.S. (EPA 2024 estimate)
— EPA Lead and Copper Rule Revisions, 2024
45 years
average age of U.S. water mains; many cities have pipes over 100 years old
— American Water Works Association, 2024
240,000
water main breaks per year in the U.S., losing 6 billion gallons of treated water daily
— EPA / AWWA Water Loss Control, 2024
14%
of treated drinking water lost to leaks and breaks before reaching consumers
— AWWA Water Loss Control, 2025
$2.8B
annual cost of emergency water main repairs across U.S. municipalities
— Utah State University Buried Structures Lab / AWWA, 2024
2031 deadline
EPA rule requiring all lead service lines to be identified and replaced within 10 years
— EPA Final Lead and Copper Rule Improvements, 2024
6,500+
U.S. water systems with actionable levels of lead detected above EPA action levels
— EPA Drinking Water Watch, 2024
PFAS Treatment Costs & Compliance
$772M–$861M
estimated annual compliance cost for EPA's new PFAS Maximum Contaminant Levels
— EPA PFAS NPDWR Economic Analysis, 2024
4 ppt
new EPA MCL for PFOA and PFOS — the lowest enforceable level ever set
— EPA PFAS National Primary Drinking Water Regulation, April 2024
4,000+
U.S. water systems expected to exceed new PFAS limits and need treatment upgrades
— EPA / EWG PFAS Contamination Map, 2024
$10B
estimated total capital cost to install PFAS treatment at all affected community water systems
— EPA NPDWR Economic Analysis, 2024
GAC / IX / RO
three primary PFAS treatment technologies — granular activated carbon, ion exchange, and reverse osmosis
— EPA PFAS Treatment Technical Guidance, 2024
$1.5B
EPA grant funding made available specifically for PFAS treatment in small and disadvantaged communities
— EPA Small Systems PFAS Grant Program, 2025
Treatment Plant Capacity & Coverage
52,000
community water systems in the U.S. with treatment plants
— EPA Safe Drinking Water Information System, 2024
46,000+
of those systems are "small" — serving fewer than 10,000 people
— EPA SDWIS, 2024
2M
Americans still lack access to safe drinking water — primarily in rural and tribal areas
— EPA / CDC / USGS, 2024
34B gal/day
total U.S. public water supply withdrawal, treated and delivered daily
— USGS National Water Use Estimates, 2020 (latest full survey)
15,000+
non-community water systems (schools, workplaces, campgrounds) requiring treatment
— EPA SDWIS, 2024
87%
of community water systems use conventional filtration (coagulation, sedimentation, filtration, disinfection)
— EPA Water Treatment Technology Survey, 2024
Cost Per Household
$600–$1,200
annual cost per household for treated municipal water (national average)
— AWWA / Bluefield Research, 2025
$43–$86
average monthly water bill in the U.S., including treatment and distribution
— Bluefield Research U.S. Municipal Water Index, 2025
$150–$300
typical annual surcharge for PFAS compliance expected in affected communities
— EPA Economic Analysis / AWWA Rate Survey, 2025
$0.004/gal
average cost per gallon of treated municipal water vs. $1–$4/gal for bottled water
— AWWA / IBWA Comparative Cost Analysis, 2025
2x
water bills in the most expensive U.S. cities (Seattle, San Francisco, Atlanta) vs. the cheapest (Memphis, Chicago)
— Bluefield Research, 2025
12%
of U.S. households pay more than 4% of their income for water service — threshold for "unaffordable"
— EPA Affordability Assessment / Michigan Study, 2024
Contaminant Violations & Treatment Methods
7–8%
of community water systems report at least one health-based violation annually
— EPA Compliance Report, 2024
30%+
of large water systems have switched to chloramines over chlorine to reduce disinfection byproducts
— AWWA Disinfection Survey, 2025
80%
of community water systems use chlorine or chloramines as their primary disinfectant
— EPA Water Treatment Technology Survey, 2024
10%
of systems use ultraviolet (UV) disinfection, growing at 3–5% annually
— AWWA / UV Disruption Survey, 2025
17%
of systems use granular activated carbon for taste/odor/organics — GAC adoption expected to grow with PFAS rules
— EPA Water Treatment Technology Survey, 2024
21,000
community water systems reported at least one health-based violation in the past 5 years
— EPA Enforcement and Compliance History Online, 2025
500+
contaminants regulated under the Safe Drinking Water Act, with 90+ having enforceable MCLs
— EPA Safe Drinking Water Act, 2024 update
Frequently Asked Questions
How much does the U.S. need to invest in water treatment infrastructure?
The American Water Works Association estimates $1 trillion is needed over the next 25 years, with $625 billion of that going specifically to pipe replacement. The Bipartisan Infrastructure Law allocated $55 billion, but this covers only a fraction of the gap. Municipalities face 7–10% annual rate increases just to maintain current service levels.
How many lead service lines are still in use?
The EPA estimates 9.2 million lead service lines remain across the U.S. as of 2024. A new EPA rule requires all lead service lines to be identified and replaced within 10 years, affecting over 6,500 water systems that currently have actionable lead levels. Replacement costs are a major driver of the overall infrastructure funding gap.
How much will PFAS treatment cost water utilities?
The EPA estimates annual compliance costs for new PFAS MCLs will range from $772 million to $861 million, with total capital investment of roughly $10 billion to install treatment at all affected systems. An estimated 4,000+ water systems will need treatment upgrades. The EPA has made $1.5 billion in grants available specifically to help small and disadvantaged communities afford these upgrades.
Is tap water safe to drink in the U.S.?
For the vast majority of Americans, yes. 7–8% of community water systems report a health-based violation in any given year, meaning 92–93% have no violations. However, 2 million Americans — primarily in rural and tribal areas — still lack access to safe drinking water. The EPA regulates over 90 contaminants with enforceable maximum contaminant levels under the Safe Drinking Water Act.
How many water main breaks occur in the U.S. each year?
Approximately 240,000 water main breaks occur annually across the U.S., resulting in 6 billion gallons of treated water lost each day. The average age of U.S. water mains is 45 years, with some city pipes exceeding 100 years. Emergency repairs cost municipalities an estimated $2.8 billion per year.
For more water quality data, see our Hard Water Statistics 2026 page for data on mineral content and scaling across U.S. water supplies, or check Bottled Water vs Tap Water Statistics 2026 for a direct cost and quality comparison between tap and bottled water.
Cite This Page:
HardWaterHQ. (2026, May). Municipal Water Treatment Statistics 2026: Infrastructure, Cost & Coverage Gaps
Retrieved from https://hardwaterhq.com/stats/municipal-water-treatment-statistics-2026