EPA's Lead and Copper Rule Improvements, Explained
The federal rule behind the notice letter homeowners are getting from their water utilities — what it actually requires, on what timeline, and who's on the hook for the cost.
What LCRI is
The Lead and Copper Rule Improvements (LCRI) is a Safe Drinking Water Act regulation finalized by the EPA in October 2024. It tightens an earlier update (the Lead and Copper Rule Revisions, or LCRR) and sets the current federal requirements for how water utilities inventory, disclose, and eventually eliminate lead service lines nationwide. If your water utility sent you a letter about a lead, galvanized, or unknown service line, LCRI is the rule that required them to send it.
The core mandate: 100% of lead lines gone by November 1, 2037
Nearly every community water system in the country must remove all lead and "galvanized requiring replacement" (GRR) service lines it knows about by November 1, 2037. Two details matter more than the date itself:
- Partial replacements are banned. If a utility replaces a line, it has to do the entire line — both the utility-owned segment and the customer-owned segment — not just its own portion.
- Utilities have to hit annual pace targets, generally replacing around 10% of their known lead/GRR lines per year on a rolling three-year average, unless they've been approved for an alternate schedule.
A date worth getting right: a lot of coverage of this rule cites "November 1, 2027" as the compliance deadline. That date is real, but it's not the finish line — it's when utilities must have their baseline lead service line inventory, an approved replacement plan, an updated sampling plan, and a list of schools and childcare facilities requiring sampling submitted and approved. The 10-year replacement countdown effectively starts around that point; full replacement isn't required until 2037.
What utilities had to do by November 1, 2027
- Submit a baseline inventory identifying every service line's material, including lead connectors like goosenecks and pigtails, and any galvanized lines requiring replacement.
- Get an approved lead service line replacement plan in place.
- Update their water sampling plan.
- Compile a list of schools and childcare facilities that require lead sampling.
The annual notification requirement
Utilities must notify, every year, any customer whose service line is classified as lead, GRR, or unknown. The federal rule sets the frequency — annual — but not a specific month or exact wording; that's left to each utility and their state's drinking water primacy agency. If you're trying to plan around when notices go out (for example, assuming they always arrive in a specific month), confirm that with your own utility rather than assuming a national pattern — it isn't set at the federal level.
Who pays: the "control" and access rule
This is the part that surprises most homeowners. LCRI defines a utility as having "control" over a service line — including the portion on private property — if it can get access to it, whether through a right-of-entry agreement, an easement, or other legal authority. If a utility has that access, it's required to replace the full line when it does the work, not just its own segment.
What the rule does not do is require the utility to pay for the customer-owned portion. If the replacement isn't covered by a grant or low-interest loan program, the utility is allowed to bill the homeowner for the cost of replacing their segment, even as part of the same project. In practice, whether you owe anything comes down to whether your specific city has funded a private-side assistance program — not to the federal rule, which only sets the floor.
Why this matters more in some cities than others
Chicago has more suspected lead service lines than any other U.S. city — city estimates put roughly 412,000 of the city's roughly 491,000 total service lines as known or suspected lead. That scale is why the private-side cost question is a live issue for so many Chicago homeowners specifically, and why we built this site around Chicago first. For the city's own official guidance and its assistance program details, go to the city's own site — we're not affiliated with it and don't want to be your only source for something this consequential.