Lead Pipe Data by Area — Ohio

Lead pipe replacement law in Ohio

Ohio has a real, distinct rule that predates the federal Lead and Copper Rule Improvements: under Ohio Administrative Code 3745-81-84 (effective May 2018), any water system whose lead sampling exceeds the federal action level must replace at least 7% of its lead service lines annually, a 15-year program — but this only applies once a system triggers that exceedance, unlike the newer federal LCRI's universal inventory-and-replace mandate regardless of testing results. A 2025 bill, Ohio House Bill 307, would extend a similar 15-year universal replacement requirement to every system statewide; as of this writing it remains pending in the Ohio House, not enacted law. Ohio EPA otherwise implements the federal Lead and Copper Rule Improvements' baseline inventory requirement, due November 1, 2027.

Separately from any state law, the EPA's federal Lead and Copper Rule Improvements require every water system nationwide to submit a baseline inventory and an approved replacement plan by November 1, 2027, then fully replace all lead and "galvanized requiring replacement" lines under its control on a schedule of 10 years or less from that date, replacing at least 10% of its known lead/GRR lines per year. A narrow exception allows a longer schedule only for the roughly 1% of systems with an unusually dense concentration of lead lines, and partial (non-emergency) replacements are prohibited.

• Ohio Administrative Code 3745-81-84 →
• Ohio EPA: Lead Lines Mapping →
• Ohio House Bill 307 (2025, pending) →
• EPA LCRI technical fact sheet: states and public water systems →
• EPA LCRI technical fact sheet: deferred deadlines →