Rockville has a systematic flushing program to remove accumulated sediment from the water system and improve water quality. Sediment can cause water discoloration, degrade water quality, and impede fire hydrant water flow, so it is removed from pipes by the planned opening and closing of certain valves and fire hydrants. Chlorine is removed from the water prior to flushing to safeguard the environment.
Rockville maintains approximately 180 miles of water pipes, 4,100 valves, and 1,300 fire hydrants. The city is divided into 39 water main districts that undergo water main flushing in rotating cycles. Flushing hours are Monday – Friday from 7 a.m. – 3 p.m. Some parking restrictions may occur to allow access to water valves.
Low water pressure and discoloration may occur due to water main flushing, repairs, disruptions, or maintenance. If you experience discoloration, run cold water until the water runs clear. These conditions are temporary and should clear up within a few hours.
2026 Scheduled Districts
- Week of June 1-5: District 15
- Week of June 8-12: District 16
- Week of June 15-19: District 39
- Week of July 6-10: District 17
- Week of July 13-17: District 38
- Week of July 20-24: District 18
- Week of Aug. 3-7: District 19
- Week of Aug. 10-14: District 20
- Week of Aug. 17-21: District 21
- Week of Sept. 7-11: District 22
- Week of Sept. 14-18: District 23
- Week of Sept. 21-25: District 24
- Week of Oct. 5-9: District 25
- Week of Oct. 12-16: District 26
- Week of Oct. 19-23: District 27
Contact
Public Works Department
Operations Maintenance Division
240-314-8567
gudepwoffice@rockvillemd.gov
Hours
Monday – Friday
8:30 a.m. – 5 p.m.
Address
Maintenance Facility
14625 Rothgeb Drive
Rockville, MD 20850