Village of Oak Park  
Public Works
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Water & Sewer Division

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Sewer Maintenance | Water Maintenance | Water Service | Hydrant Flushing | Flood Prevention
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Fire hydrant flushing

Each year fire hydrants throughout the Village are opened to flush the 105 miles of water mains and to test each hydrant. Hydrants are flushed in the spring and early summer, typically in May and June. Hydrant flushing is an important part of the maintenance to the Village’s water distribution system and serves the following purposes:

  • Flushes sediments from the water mains, helping to maintain water quality
  • Verifies proper operation of the fire hydrants and valves
  • Verifies the proper pressure and flow for fire fighting
  • Helps identify closed valves and low pressure zones

During hydrant flushing the following conditions may occur:

  • Temporary drop in water pressure
  • Water may appear rusty, the reddish color caused by iron deposits
  • Water may become cloudy or appear milky, which is caused by air being trapped in the water and will dissipate within a few minutes.

Frequently asked Questions

Q: What should I do when crews are flushing hydrants in my area?
A: When you see a crew flushing hydrants in your area, avoid running opening tap and washing clothes until the flushing is completed. Drive carefully around an open running hydrant, watch for Fire or Public Works department personnel and keep children away from the crews.

Q: What should I do after hydrant flushing?
A: Water can become cloudy or discolored and full of sediment if run during flushing. If you experience cloudy or discolored water, shut the water off and wait several minutes. Then run the cold water only for a few minutes for the water to clear up. This may need to be repeated a few hours later. The discoloration only affects the appearance of the water and poses no health hazards. If pressure or volume of water seems low, check faucet aerator screens for sediment.

Q: What about running appliances such as washing machines?
A: Avoid doing laundry during hydrant flushing. White clothes may become stained if the water is not properly cleared first. Do dark clothes in the first load after the hydrant flushing.

Q: Who do I call for more information?
A: For more information about hydrant flushing or water quality, please call the Water & Sewer Division, 358.5746. Hours are 7:30 a.m. – 4 p.m., Monday through Friday. With concerns during non-work hours, call the Police non-emergency number, 386.3800. You also may e-mail the Public Works Department.


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Useful Information

Contact Number:
708.358.5700

E-mail:
PublicWorks@oak-park.us

Address:
South Boulevard @ Lombard Avenue

Related Information:
Water Billing

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