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Help Us Help You: The City Seeks Public Input for Inventory of Water Service Lines

Diagram outlining water flow from water mains, through water service lines to building plumbing systems.
Rockville is coordinating with the Washington Suburban Sanitary Commission (WSSC Water) to ensure all residents have safe water. WSSC Water provides additional information to their customers at

A map posted to Rockville’s website in June will enable residents to help the city identify materials used in the water service lines throughout the city, as required by recent U.S. Environmental Protection Agency rule changes.

Image depicts copper, galvanized, plastic and lead water service lines.

The Lead and Copper Rule Revisions require that all water service providers, including the City of Rockville, prepare an inventory of materials used in water service line pipes on both public and private property.

As part of creating that inventory, a service line inventory map is now available online. The map allows users to review information the city has on file regarding the material used in service lines on public and private property.

City staff has reviewed records to determine the service line material for many customers whose water
is supplied by the City of Rockville. However, many addresses remain where the service line material is yet unknown.

The city may ask property owners for their assistance in inspecting and determining the material used in private service lines. Rockville will conduct a survey later this year with steps customers can take to determine the material of their service line and report the material to the city.

Water service lines are small pipes that carry water from water mains into homes and other buildings. The City of Rockville owns part of the service line, from the main to the meter. Customers own the other part, from the meter to the building.

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Rockville Reports is the official publication of the City of Rockville, published at City Hall, 111 Maryland Ave., Rockville, MD 20850-2364.