Milwaukee Water Works
Unknown Water Service Lines
Did you receive a notice about an unknown water service line?
Milwaukee Water Works needs your help confirming the pipe material inside your home or building.
Please take photos of the service line where it enters your property and complete the online form.
Your information will help Milwaukee Water Works update its service line inventory and plan for future replacements.
Submit Your Service Line Information
Not sure whether your service line material is listed as unknown? Check your address at milwaukee.gov/checkaddress.
Prioritization Program
Milwaukee is replacing lead service lines across the city. Neighborhoods are prioritized based on how many lead pipes are in each neighborhood, child health data, and community needs.
Learn more about the Prioritization Program at milwaukee.gov/MPP.
Updates:
July 29, 2026 – Temporary Change to Fluoride Addition
Milwaukee Water Works is temporarily reducing the amount of fluoride added to drinking water because of supply chain issues affecting fluoride used in water treatment.
Milwaukee’s drinking water remains safe to drink and continues to meet water quality standards. Beginning Friday, July 31, 2026, fluoride levels will be reduced from approximately 0.6–0.7 milligrams per liter, or mg/L, to approximately 0.3 mg/L.
For more information: milwaukee.gov/fluoride
July 6, 2026 – New Customer Service Hours
Walk-in and phone hours are now 8:00 a.m.–4:45 p.m.
- Questions? Call 414-286-2830
- Email: [email protected]
April 29, 2026 – 2025 Water Quality Report
Milwaukee Water Works provides safe, high-quality drinking water through routine testing and monitoring at the treatment plants and throughout the water distribution system.
View the Annual Water Quality Report for results from thousands of water-quality tests and information about Milwaukee’s drinking water:
View the report at milwaukee.gov/AWQR
Read the full press release for additional details.
April 21, 2026 – City of Milwaukee Lead Service Line Replacement Construction in Full Swing for 2026
MILWAUKEE – Construction is underway across Milwaukee as Milwaukee Water Works (MWW) ramps up its 2026 Lead Service Line Replacement work. This effort removes sources of lead by replacing the service lines that connect homes to the water main, helping reduce potential exposure through drinking water. To date, MWW has replaced more than 13,000 lead service lines.
Read the full press release for additional details.
December 18, 2025 – Water Service Line Information
As required by the Lead and Copper Rule Revisions, Milwaukee Water Works has sent updated notification letters to properties with confirmed lead service lines or unknown service line material. The letters include information about the health effects of lead and ways to reduce exposure in drinking water.
View current notification letters:
The service line inventory is now publicly available here.