Statistics & Data
Lead in Drinking Water Statistics 2026: How Many Homes Still Have Lead Pipes?
Updated April 2026 · Research compiled from EPA, CDC, NRDC, AWWA
Last Updated: April 2026
Lead contamination in drinking water remains one of the most serious public health threats in the United States, despite being well-understood for decades. Unlike most water quality issues, lead primarily enters drinking water not at the source but through aging distribution infrastructure — lead service lines connecting homes to water mains, lead solder in plumbing, and lead-containing brass fixtures. These statistics document the current scale of lead exposure, health impacts, and the progress (and gaps) in replacing lead infrastructure across the country.
9.2M
Lead service lines still in use across the United States, delivering water to millions of homes
— EPA Lead and Copper Rule Improvements, 2024
Lead Pipe Prevalence
9.2M
Lead service lines (LSLs) connecting homes to water mains in the U.S.
— EPA, 2024
400,000
Schools and childcare facilities in the U.S. that may have lead pipes or lead-containing fixtures
— EPA / NRDC, 2024
22M
Americans served by water systems with lead service lines — many unaware their service line contains lead
— NRDC, 2024
~50%
of homes built before 1986 may have lead solder in plumbing, even without a lead service line
— CDC / EPA, 2024
Illinois
State with the most lead service lines — an estimated 677,000+ LSLs, many in Chicago
— NRDC / BlueConduit, 2024
Pre-1986 homes
Homes built before 1986 are at highest risk — lead solder was federally banned in plumbing that year
— EPA, 2024
80M+
U.S. homes with plumbing installed before 1986 — all should be tested for lead regardless of pipe material
— U.S. Census Bureau / CDC, 2024
Exposure Levels & At-Risk Populations
0 ppb
Safe level of lead in drinking water — there is no safe level of lead exposure according to CDC and WHO
— CDC / WHO, 2024
15 ppb
EPA's current Lead and Copper Rule "action level" — systems must act when 10% of samples exceed this
— EPA Lead and Copper Rule, 2024
10 ppb
New EPA action level under 2024 Lead and Copper Rule Improvements — to be fully implemented by 2027
— EPA LCRI, 2024
500,000+
U.S. children aged 1–5 with elevated blood lead levels above 3.5 µg/dL, the CDC reference value
— CDC NHANES, 2024
Low-income
Communities of color and low-income neighborhoods are 2–3x more likely to have lead service lines and face higher exposure risk
— NRDC Environmental Justice Report, 2024
Pregnant women
Lead exposure during pregnancy increases risk of premature birth, low birth weight, and miscarriage — no safe level exists
— CDC, 2024
Health Effects & Children
$50B/yr
Estimated economic cost of childhood lead poisoning in the U.S. from all sources (water, paint, soil)
— CDC / Landrigan analysis, 2024
5 IQ points
Average cognitive loss associated with blood lead levels in children — permanent and irreversible
— CDC, 2024
3–5x
Higher risk of attention deficit/hyperactivity disorder (ADHD) in children with elevated blood lead levels
— CDC / NHANES, 2024
Kidney disease
Lead exposure is a significant risk factor for chronic kidney disease in adults — affecting an estimated 2 million Americans
— NRDC / CDC, 2024
Infants
Infants fed formula made with tap water are at highest risk — can receive 40–60% of their lead exposure through water
— CDC, 2024
No reversal
Neurological damage from childhood lead exposure cannot be reversed — prevention is the only effective strategy
— CDC / AAP, 2024
EPA Standards & Violations
2,000+
Water systems nationwide with confirmed lead action level exceedances between 2020–2024
— EPA SDWIS, 2024
100%
of water systems must inventory lead service lines and submit data to EPA under 2024 LCRI rules
— EPA LCRI, 2024
10 years
Deadline for full lead service line replacement under EPA's 2024 Lead and Copper Rule Improvements
— EPA LCRI, 2024
7,400+
Public water systems that serve schools or day care centers requiring lead testing under federal law
— EPA, 2024
Flint legacy
The 2014–2019 Flint water crisis exposed 100,000 residents to lead — contaminating 20,000+ service lines and costing $600M+ in cleanup
— NRDC / Michigan Department of Health, 2024
Pipe Replacement Progress
$15B
Federal funding for lead pipe replacement allocated by the Bipartisan Infrastructure Law (2021)
— EPA / White House, 2024
$30,000–$80,000
Average cost to replace a single lead service line from main to home connection
— AWWA, 2024
200,000/yr
Lead service lines replaced annually in recent years — at this pace, full replacement would take 45 years
— AWWA / NRDC, 2024
Chicago
Has more lead service lines than any U.S. city — est. 400,000 — and faced an $8.6B replacement challenge
— City of Chicago / NRDC, 2024
Household Protection
NSF/ANSI 53
The certification standard for filters that reduce lead — look for this on any filter marketed for lead reduction
— NSF International, 2024
99%
Lead reduction effectiveness of NSF 53-certified reverse osmosis systems — the gold standard for household lead protection
— NSF International, 2024
$30–$300
Price range for NSF 53-certified lead-removing filters — from pitcher filters to under-sink units
— NSF International / WQA, 2024
Flush 30 seconds
Flushing cold water for 30 seconds to 2 minutes before use reduces lead levels by 50–80% in homes with lead service lines (interim measure only)
— EPA, 2024
Frequently Asked Questions
How many U.S. homes still have lead pipes?
The EPA estimates there are approximately 9.2 million lead service lines still connecting U.S. homes to municipal water mains. Additionally, about 80 million homes built before 1986 may contain lead solder in plumbing — the year the federal government banned lead from new residential plumbing. An estimated 22 million Americans receive water through systems with lead service lines.
What is the safe level of lead in drinking water?
There is no safe level of lead in drinking water. Both the CDC and WHO state that no amount of lead exposure is without risk. EPA's current "action level" of 15 ppb triggers mandatory remediation, with a new 10 ppb threshold set in the 2024 Lead and Copper Rule Improvements. However, health agencies recommend treating any detectable lead as a concern, particularly for infants, young children, and pregnant women.
How does lead get into tap water?
Lead almost never enters water at its source — it leaches into water as it travels through lead service lines connecting homes to water mains, or through lead solder and lead-containing brass fixtures inside homes. Corrosive water (low pH, soft water) accelerates lead leaching. That's why homes built before 1986 are most at risk, even when the municipal water supply itself tests clean at the treatment plant.
What filters remove lead from drinking water?
NSF/ANSI Standard 53-certified filters are verified to reduce lead in drinking water. Effective options include NSF 53-certified pitcher filters (e.g., Brita Longlast, PUR), under-sink filters, and reverse osmosis systems (which are certified to remove 99%+ of lead). Regular boiling does not remove lead and can actually concentrate it. Always verify your filter carries NSF 53 certification specifically for lead.
How quickly will lead pipes be replaced across the U.S.?
EPA's 2024 Lead and Copper Rule Improvements set a 10-year deadline for full lead service line replacement. The Bipartisan Infrastructure Law allocated $15 billion toward this goal. However, at current replacement rates of roughly 200,000 lines per year, replacing all 9.2 million lead service lines would take 45+ years without a major acceleration. Major cities like Chicago face multi-billion dollar replacement challenges that will take decades to fully resolve.
Cite This Page:
HardWaterHQ. (2026, April). Lead in Drinking Water Statistics 2026: How Many Homes Still Have Lead Pipes?
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