Lead Pipe Data by Area — Wisconsin
6 areas across Wisconsin with enough data for a dedicated breakdown.
Lead pipe replacement law in Wisconsin
Wisconsin has not set its own state-specific lead service line replacement deadline beyond the federal requirement below. The Wisconsin DNR's own administrative rule change adopts the EPA's Lead and Copper Rule Improvements directly -- a DNR spokesperson has stated the agency is required to adopt the federal changes, not creating an independent, earlier state standard. The Wisconsin DNR separately administers Safe Drinking Water Loan Program funding, including a BIL-funded Lead Service Line Replacement Program and a community outreach grant, specifically for lead service line replacement projects, but this is a funding program, not a regulatory deadline.
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.