In October 2024, the EPA finalized the most significant update to lead-in-drinking-water regulations in nearly three decades. The Lead and Copper Rule Improvements (LCRI) set a firm 10-year deadline for replacing every lead service line in the country and lowered the action level from 15 parts per billion to 10 ppb. Eighteen months later, the picture is more nuanced: there are fewer lead pipes than originally estimated, billions in funding are flowing to states, and legal challenges could reshape the timeline.
Here’s the full picture as of March 2026.
What the LCRI Requires
The Lead and Copper Rule Improvements introduced four major changes:
Mandatory Lead Service Line Replacement
Every water system must identify and replace all lead service lines within 10 years. This is the first time the federal government has set an absolute deadline for eliminating lead pipes — previous rules only required partial replacement when lead levels exceeded action thresholds.
Lower Action Level
The lead action level dropped from 15 ppb to 10 ppb. When a system exceeds this threshold, it must take corrective action including public notification, corrosion control optimization, and accelerated pipe replacement. Systems must notify affected customers within 24 hours of a confirmed exceedance.
Improved Testing Protocols
Utilities must use updated sampling procedures — including first-draw and fifth-liter samples — designed to capture more accurate lead readings at the tap. The fifth-liter sample is particularly important because it captures water that has been sitting in the lead service line itself, rather than just the fixture plumbing.
Public Notification and Transparency
Water systems must publish their service line inventories publicly and inform residents directly about whether their home is served by a lead pipe. This is a significant transparency requirement — many residents have no idea what material connects their home to the water main.
For a comprehensive look at lead exposure risks and what you can do at home, see our lead in drinking water guide.
Fewer Pipes Than Feared
One of the most significant developments since the rule was finalized: the scope of the problem is smaller than originally estimated.
The first round of mandatory service line inventories — required under the 2021 Lead and Copper Rule Revisions — were due October 16, 2024. After a year of analyzing state submissions, the EPA revised its national estimate from 9.2 million lead service lines down to approximately 4 million. That’s less than half the original figure.
The reduction comes from better data, not fewer pipes being found. Many utilities had previously reported “unknown” material for large portions of their distribution systems. The mandatory inventory process forced them to actually investigate — through records reviews, predictive modeling, and physical inspections — and many lines turned out to be copper, galvanized steel, or other non-lead materials.
Still, 4 million lead pipes serving American homes is an enormous infrastructure challenge. The states with the highest documented concentrations include:
- Illinois — driven by Chicago’s aging system
- Ohio — legacy industrial cities
- Pennsylvania — older Northeast infrastructure
- Florida — higher than expected based on housing age
- Michigan — post-Flint awareness accelerated inventory efforts
You can check lead levels and violation history for any city on WaterVerge. Search your city or browse the lead contamination map to see how your area compares.
$15 Billion in Federal Funding
The Bipartisan Infrastructure Law (IIJA) dedicated $15 billion specifically for lead service line replacement, distributed through the Drinking Water State Revolving Fund over five annual rounds.
Funding Released So Far
| Year | Amount | Status |
|---|---|---|
| FY 2022 | $3 billion | Distributed |
| FY 2023 | $3 billion | Distributed |
| FY 2024 | $3 billion | Distributed |
| FY 2025 | $3 billion + $1.1B reallocated | Announced November 2025 |
| FY 2026 | $3 billion | Final round — expected late 2026 |
The FY 2025 round was notable for two reasons. First, it included $1.1 billion in reallocated funds from prior years that states hadn’t spent — a sign that some states struggled to deploy funding quickly enough. Second, the EPA shifted its allocation formula to tie funding to actual inventory data rather than population-based estimates. This directs more money toward states with documented lead burdens, particularly in the Great Lakes region and Northeast.
Expanded Eligibility
Starting in FY 2025, states can allow IIJA lead pipe funds to cover connected infrastructure — water mains, meters, and service connections — when replaced alongside lead lines in disadvantaged communities. This “dig once” flexibility reduces costs and construction disruption.
The Funding Gap
Despite $15 billion in dedicated federal funding, the total cost of nationwide lead service line replacement is estimated at $45–$60 billion. The upcoming Drinking Water State Revolving Fund reauthorization in 2026 will be a critical moment for closing that gap. Some members of Congress have proposed cutting infrastructure funding, which would slow replacement timelines considerably.
Legal Challenges
The LCRI faces legal challenges from both sides. The American Water Works Association and other industry groups filed suit arguing the 10-year replacement timeline is unrealistic for many systems. Briefing concluded in January 2026, with oral arguments expected in the coming months.
If the court modifies the timeline, it could delay replacement deadlines for smaller systems while keeping the mandate intact for larger utilities that have already begun planning.
Why Lead Exposure Still Matters
Lead has no safe level of exposure. Even concentrations below the old 15 ppb action level cause measurable harm, particularly in children:
- Developmental delays — reduced IQ, learning disabilities, behavioral problems
- Neurological damage — effects are irreversible in young children
- Cardiovascular effects — elevated blood pressure and kidney damage in adults
- Reproductive harm — reduced fertility and adverse pregnancy outcomes
The CDC estimates that approximately 400,000 children in the U.S. have blood lead levels above the reference value of 3.5 micrograms per deciliter. Drinking water is one of the primary exposure pathways, especially in homes with lead service lines where water sits in the pipe overnight.
For detailed information on lead health effects and home filtration options, see our lead contaminant profile and lead in drinking water guide.
How to Check Your Home
Check your city’s data on WaterVerge
Search your city to see current lead monitoring results, historical trends, and whether your water system has reported action level exceedances. WaterVerge tracks compliance data from EPA records for every public water system in the country.
Find out if you have a lead service line
Your utility is now required to publish its service line inventory. Contact your water provider or check their website for a searchable map or database. If your home was built before 1986, there’s a higher probability of lead solder in your plumbing — even if the service line itself isn’t lead.
Test your water
If you suspect lead exposure, test your tap water. Home lead test kits are available for $20–$50, though certified lab testing ($30–$100) provides more accurate results. Our well water testing guide covers testing options in detail.
Filter your water
NSF 53-certified filters are independently tested to reduce lead. Both under-sink and pitcher-style filters can be effective. See our best water filter pitchers guide for specific recommendations, including filters certified for lead removal.
What Happens Next
The legal challenge will likely be resolved by mid-2026. Regardless of the outcome, the core mandate — replace all lead service lines — is expected to survive. The question is timing: 10 years or something longer for systems that face genuine infrastructure and funding constraints.
Meanwhile, the final round of IIJA funding ($3 billion) is expected in late 2026, and the DWSRF reauthorization will determine whether additional federal money follows. WaterVerge will continue integrating lead monitoring data and service line inventory information as it becomes available.
Browse the lead map to see lead levels across the country, or check your state’s data on the states page.
Related Coverage
- What the Jackson, Mississippi Water Crisis Taught Us — infrastructure failure and federal intervention
- Lead in Your Drinking Water: A Homeowner’s Guide — risks, testing, and filtration
- Lead Contaminant Profile — detection data and health information
- Best Water Filter Pitchers for 2026 — filters certified for lead removal