State guide
Illinois
Illinois has statewide lead-service-line requirements in both environmental and public-health agency materials. State pages describe service lines as generally jointly owned by the water supply and the property owner, and Illinois law requires inventories, notifications, and replacement planning while largely barring partial lead line replacement.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- Who usually owns the water service line
- Illinois state pages describe service lines as generally jointly owned; local utility pages commonly split responsibility at the b-box, curb stop, or meter pit, with the owner responsible from that point to the building.
- State drinking water program
- Illinois Environmental Protection Agency, Division of Public Water Supplies Compliance Assurance Section
- State lead service line page
- Official page →
- Permits for repair or replacement
- Illinois state health guidance says repaired or replaced service lines must be installed and inspected under Illinois plumbing laws; local utilities such as Elgin explicitly require a city permit for private-side replacement.
- Assistance programs
- Elgin says city-initiated projects or emergency repairs pay for the entire lead service line, and scheduled city projects replace the private side at no cost to the property owner with the required acknowledgment form.
Official resources in Illinois
State lead service line inventory and replacement page for community water supplies.
State public-health page summarizing ownership, plumbing requirements, and the Illinois lead-service-line law.
State drinking water landing page with program contacts and drinking-water topics.
Local official FAQ that clearly states the public/private split, permit requirement, and who pays in different scenarios.
Local replacement-process page showing curb-stop verification and no-cost city replacement of the private side on scheduled projects.
Key facts for Illinois
- IDPH says water service lines in Illinois are generally jointly owned by water supplies and property owners.
- Illinois’ Lead Service Line Replacement and Notification Act took effect January 1, 2022.
- Illinois law requires community water supplies to maintain a comprehensive service-line material inventory and replacement plan.
- Illinois’ lead-service-line law prohibits partial lead service line replacement except in certain circumstances.
- IDPH says service-line repair or replacement should be done by people authorized under the Plumbing License Law and inspected under the Plumbers Licensing Code.
- Elgin says a homeowner-initiated replacement requires a city permit, and the city pays only for its portion from the water main to the b-box/shutoff valve.
Utility water service line rules in Illinois
| Utility | city | phone | Details |
|---|---|---|---|
| Illinois EPA Division of Public Water Supplies Compliance Assurance Section Sangamon | Springfield | (217) 785-0561 | State contact for lead service line replacement and inventory requirements. |
| City of Elgin Water / Utilities Department Kane | Elgin | 847-931-6001 | Handles lead-service-line questions, permits routing, and city replacement program information. |
| City of Elgin Lead Testing and Water Filter Program Kane | Elgin | 847-931-6001 | Offers free lead testing kits and water pitcher filters to eligible residents, businesses, schools, and childcare facilities. |
| City, Water, Light and Power (CWLP) Sangamon | Springfield | 217.789.2323, Ext. 2 | Water service outage or trouble contact; Springfield bid documents show CWLP replacing from the water main to the curb stop or meter pit on city projects. |
| City of Rockford Water Division Winnebago | Rockford | 779-348-7300 | Water division administration and service contact for Rockford customers. |
* Not published: the official page doesn't list it. Call the office to confirm before you rely on it.
What to do next
- Check your utility’s inventory or map first; in Illinois, many cities already classify known, suspected, and unknown service-line materials.
- If you plan private-side replacement, ask the city or utility whether a plumbing permit, inspection, or temporary easement form is required before work starts.
- If your city offers a city-initiated lead replacement project, respond promptly; some programs replace the private side at no cost when the property is scheduled.
Not seeing your utility or county?
We list a utility only when an official government page publishes its rules. If yours isn't in the table above, it may not publish them online yet. Here's what to use instead, in order:
- General Start with the statewide information above. It applies across Illinois, but cities and counties can add their own steps, fees or deadlines.
- Closest verified Nearest places where we have verified local data outside this state (distance from Illinois's population center, for comparison only):
- City of Lafayette Water Works, Indiana · about 98 miles
- South Bend Water Works, Indiana · about 109 miles
- Davenport Public Works, Iowa · about 120 miles
- Call to confirm Ask the official office. They have the current local rule, fee and form.Illinois EPA Lead Service Line Information
Website →Phone: (217) 782-3397 (as listed on that page, checked Oct 4, 2026)Your city or county office: Local governments →Not sure who handles it locally? USAGov's free help line, 1-844-872-4681, or the Illinois page on USA.gov can point you to the right office. - Know the current info? Tell us and include a link to the official page. We check every tip before it goes up.
Helpful guides
- Who is responsible for the water line to your house?
- The curb stop, meter and property line, explained
- Water line leak in your yard: what to do
- Water service line replacement costs
Water line responsibility check →