Water Main Flushing

Rockville has a systematic flushing program to remove accumulated sediment from the water system. The city is divided into 39 districts and undergo water main flushing in cycles.

Flushing Hours
Monday - Friday from 7 a.m. to 3 p.m.

2018 Scheduled Districts

  • District 17: July 9-13
  • District 38: July 16-20
  • District 18: July 23-27
Some parking restrictions may occur to allow access to water valves. As flushing takes place, some temporary discoloration may occur. If you experience discoloration, run the cold water until the water runs clear. These conditions are temporary and should clear up within 2-3 hours.
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Operations and Maintenance
Monday - Friday
8:30 a.m. - 5:00 p.m.

About Water Main Flushing

The City removes the chlorine from the water prior to discharge to safeguard the environment. Rockville maintains approximately 180 miles of water pipes, 4,168 valves and 1,363 fire hydrants. The sediment, which can cause water discoloration, degrade water quality and impede fire hydrant water flow, is removed from the pipes by the planned opening and closing of certain valves, as well as the opening of fire hydrants.

The City of Rockville is committed to providing the best possible services to customers. This work is part of ongoing efforts to improve water quality and delivery citywide.

Annual Drinking Water Quality Report