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City of McHenry
Friday April 17th, 2026 :: 03:07 p.m. CDT

Advisory

Spring 2026 Hydrant Flushing begins Monday, April 20th

The Public Works Department will begin its spring hydrant flushing operation throughout the City on April 20th for a three-week period ending May 8th.

Hydrant flushing is necessary to clean and maintain the water distribution system. During the flushing period, water can become discolored. If this occurs, run your cold water tap for a few minutes until the water clears. If this does not correct the problem, wait approximately one (1) hour and flush the cold water again. Do not run your hot water until the cold water tap has cleared. This discoloration is not hazardous for human consumption; however, clothing can become stained during laundering.

Address/Location
City of McHenry
333 S Green St
McHenry, IL 60050

Contact
Emergency: 9-1-1
Non-emergencies: 815-363-2100

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