State guide
Illinois
Illinois has a state lead service line law and a statewide Illinois EPA lead-service-line information page for inventories and replacement requirements. Current official utility pages show homeowner help on the private side from multiple utilities, including full no-cost replacement programs and, in Naperville, both a no-cost city program and a separate rebate path.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- State lead service line page
- Official page →
Official resources in Illinois
State lead service line page covering inventories, replacement requirements, notices, and utility reports.
Explains Illinois lead service line requirements and links residents to additional state resources.
Utility page for identifying service line material and Illinois American Water’s replacement program.
Utility page with Aqua Illinois’s customer-side identification and replacement program details.
City program page for no-cost full replacement of known lead service lines and related agreements.
Key facts for Illinois
- Illinois EPA says the Lead Service Line Replacement and Notification Act took effect January 1, 2022.
- Illinois EPA’s lead page says complete material inventories were due by April 15, 2024.
- Illinois American Water says it will replace qualifying customer-owned lead or galvanized service lines at no direct cost.
- Aqua Illinois says it replaces lead or galvanized service lines requiring replacement at no direct cost to homeowners.
- Naperville says its city contractors replace the entire lead service line at no cost to the homeowner.
- Naperville also offers a rebate when a customer replaces the entire lead service line on their own.
Utility help for homeowners in Illinois
| Utility | city | program | Details |
|---|---|---|---|
| Illinois American Water | Multiple communities | Lead Service Line Replacement Program | Illinois American Water says if the customer-owned portion is lead or qualifying galvanized material, it will work with the owner to replace it at no direct cost, cover the cost, and provide a 1-year warranty. |
| Aqua Illinois | Multiple communities | Aqua Illinois Lead Service Line Replacement Program | Aqua Illinois says it will replace lead or galvanized service lines requiring replacement at no direct cost to the homeowner, provide six months of pitcher-filter cartridges, offer sampling, restore property, and provide a warranty. |
| City of Naperville Water Utility | Naperville | Lead Service Line Replacement Program | Naperville says city contractors replace the entire length of the lead water service line from the water main to inside the residence at no cost to the homeowner, with restoration and a 12-month warranty. |
| City of Naperville Water Utility | Naperville | Lead Rebate Program | Naperville says customers who replace the entire lead water service line themselves can qualify for a rebate; the city says the amount depends on whether the replacement is long-side or short-side. |
What to do next
- Check the Illinois EPA lead page first, then your utility’s lead page, because Illinois utilities publish different replacement processes and agreements.
- If your utility offers no-cost replacement, respond quickly to access or consent forms so the utility can replace the entire line.
- In Naperville, compare the city’s no-cost replacement program with the rebate route before hiring your own plumber.
Helpful guides
- Who pays to replace the private side of a lead service line?
- Lead service line replacement grants, reimbursements and loans
- How to tell if your water service line is lead
- The Lead and Copper Rule Improvements: what homeowners need to know
Lead line cost-share estimator →