Water Service Line Materials Inventory

In 2001 an update to a federal rule (Lead and Copper Rule Revisions) gave all Public Water Suppliers nationwide a deadline of October 2024 to create an Inventory of all water service lines in their systems and notify any customers with a Lead, Galvanized Requiring Replacement (GRR), or Unknown Material water service. Each Customer with a Lead, Galvanized Requiring Replacement (GRR), or Unknown Material will be notified annually until such time the service is replaced. The rule revisions require all Lead and Galvanized Requiring Replacement services be replaced by 2037.   

In Winona the Water Department has completed the Service Line Materials Inventory and as of 10/20/2025 has 0-Lead service lines, 6,320 non-lead service lines, 2,620 Galvanized Requiring Replacement service lines, and 0 Unknown Material service lines. If you have received notification of having a Galvanized Requiring Replacement Service Line the Inventory List has you down as needing replacement and no action by the homeowner is needed. This Inventory was built by using Tap Card Records, Construction Dates, and In-Home Inspections and will be updated to the Minnesota Dept of Health Lead Inventory Tracking Tool (LITT) annually. Please visit the Lead Inventory Tracking Tool (LITT) to view the project scope statewide and zoom into your individual property. If you believe your individual service line classification to be inaccurate please contact the water dept at (507) 457-8272 and we will update the records accordingly. Please see pictures below to reference service line materials.

Galvanized Service Line 

Copper Service Line

Polyethylene Service Line

Picture of service line materials 2Picture of service line materials 5722739617381896424


Service Lines in Winona, MN

A service line is the pipe that connects the water main to the inside of a building. Water service lines can be buried up to 8 feet deep, and replacing or repairing these lines requires significant excavation to access them. In Winona, property owners are responsible for the entire service line. 

Diagram of Water Service Line

  1. What the City of Winona is doing about Lead or GRR Service Lines?
  2. What you can do about Lead or GRR Service Lines?

The City of Winona developed the Service Line Materials Inventory and is working to classify all unknown services. 

All Customers with a GRR or Unknown Materials water service has received a notification letter 

Lead and Copper monitoring is completed according to Minnesota Department of Health’s schedule, most recent sample results are included in the Water Quality Report.

The City of Winona has currently applied for State and Federal Grant funding for three service line replacement projects to take place in 2026 and are currently awaiting approval. The project areas are priortized based on state and federal rules and regulation guidelines.     

Learn More

To learn more about lead containing plumbing fixtures:

To learn more about lead in drinking water:

To learn more about reducing lead from sources: