Rockville Reports, Water and Sewer

Take the Survey and Request a Test: Water Service Line Inventory Efforts Continue

Rockville is continuing efforts to identify materials used in customers’ drinking water service lines.

In December, a new notification letter was mailed to customers whose service lines are still classified as being of unknown material or as “galvanized requiring replacement.” GRR pipes may have been connected downstream from a lead service line, creating a risk of lead in drinking water. The Environmental Protection Agency’s Lead and Copper Regulations require they be replaced.

To create a comprehensive service line inventory, city staff have reviewed historical records and conducted two rounds of customer self-reporting surveys in November 2024 and July 2025. Next steps include data analytics, targeted field verification and door-to-door visits to efficiently confirm pipe materials for hard-to-access lines.

As of December, no lead service lines have been identified within the City of Rockville’s water system. Preliminary customer survey results identified 23 GRR pipes exclusively on the customer-owned portion of the service line.

Rockville encourages all customers with unknown service lines to visit rockvillemd.gov/lcrr to complete a service line inventory survey for their home. The webpage also offers customers with unknown or GRR lines the opportunity to request free water testing. Testing provides essential information for protecting public health and ensuring the inventory is accurate.

To learn more, visit rockvillemd.gov/lcrr, email lcrr@rockvillemd.gov or call the Department of Public Works at 240-314-8500.