State guide
Wisconsin
Wisconsin has unusually clear statewide lead-service-line guidance: the DNR says most municipalities split ownership at the curb stop, with the owner responsible to the normal connection point inside the building. The state also runs major municipal funding programs for both public- and private-side lead service line replacement.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
Try a ZIP like 30303, “Travis County” or “Columbus, OH”
- Who usually owns the water service line
- In most Wisconsin municipalities, the utility is responsible from the water main to the curb stop, and the property owner is responsible from the curb stop to the normal connection point inside the building, excluding the water meter.
- State drinking water program
- Wisconsin Department of Natural Resources, Drinking Water & Groundwater Program
- Permits for repair or replacement
- State pages note DSPS licenses plumbers and enforces plumbing code; Madison requires a water service application for replacement services and notes street opening permits may apply.
- Assistance programs
- The DNR’s LSL programs fund municipalities for public- and private-side replacement work, not homeowners directly; Madison says a discovered lead service may qualify for a rebate up to $3,000, and Green Bay says some lead/GRR replacements may be reduced-cost or no-cost.
Official resources in Wisconsin
Wisconsin DNR - Drinking Water
State drinking water program page for public water systems, contacts, and drinking water topics.
Milwaukee Water Works - Repair of service line to property
Utility page explaining where city ownership ends, where owner responsibility begins, and what to do about leaks.
Madison Water Utility - Plumbers & Contractors
Utility page for replacement-service applications, curb stop handling, and service change procedures.
Key facts for Wisconsin
- The DNR says most Wisconsin municipalities split responsibility at the curb stop.
- The DNR says the private portion for funding runs from the curb stop to the normal connection point inside the building.
- The DNR says municipalities, not individual homeowners, apply for private-side lead service line replacement funds.
- DNR guidance recommends replacing lead service lines in their entirety because partial replacement can increase lead levels.
- Milwaukee says the city owns the service line from the water main to the curb stop at the property line.
- Milwaukee ordinance § 225-22.5 requires full public- and private-side replacement when a lead service line leaks or fails.
Utility water service line rules in Wisconsin
| Utility | city | phone | Details |
|---|---|---|---|
| Wisconsin DNR Drinking Water & Groundwater Program Dane | Madison | 1-888-936-7463 | State drinking water program contact for public water system information and county contacts. |
| Milwaukee Water Works Customer Service Center Milwaukee | Milwaukee | (414) 286-2830 | Handles meter issues and publishes owner-leak guidance showing the curb-stop split. |
| Madison Water Utility Dane | Madison | (608) 266-4651 | Utility main office for lead service replacement rebate questions and general water service help. |
| Madison Water Utility - Locate and Check / Service Box Dane | Madison | (608) 266-4661 | Property owners and plumbers should contact the utility before operating the curb stop. |
| Green Bay Water Utility Brown | Green Bay | 920-448-3480 | Publishes service-line lookup information and utility-versus-customer responsibility. |
| Green Bay Water - Lead/GRR replacement contact Brown | Green Bay | 920-785-7904 | Contact listed for owners who may qualify for municipal programs to replace lead or galvanized requiring replacement lines. |
* 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 service-line map or inventory first; Wisconsin cities often publish utility-side and customer-side materials separately.
- If your private side is lead or galvanized requiring replacement, ask your municipality whether it has DNR-funded replacement money.
- Use a licensed plumber and confirm whether a water-service application or street-opening permit is required before replacement.
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 Wisconsin, 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 Wisconsin's population center, for comparison only):
- City of Rockford Water Division, Illinois · about 101 miles
- City of Elgin Water / Utilities Department, Illinois · about 122 miles
- City of Elgin Lead Testing and Water Filter Program, Illinois · about 122 miles
- Call to confirm Ask the official office. They have the current local rule, fee and form.Wisconsin DNR - Drinking Water
Website →Phone: (888) 936-7463 (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 Wisconsin 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 →
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