Fire Hydrant Flushing
Each hydrant is thoroughly inspected and operated. Flow readings are taken to evaluate system capability to provide sufficient water supply. Low flows may indicate a water main valve is closed or not operating properly. Large volumes of water are moved through the mains during flushing which pressure cleans the internal walls of the piping and increases the main’s longevity.
The water pumping stations also benefit from hydrant flushing. As large volumes of water are flowed through the system, the water storage tanks’ levels will fluctuate more than they normally do. This allows the water operators to check pressure adjusting and pumping stations’ ability to respond to these pressure fluctuations and gain an overall picture of system performance during a peak usage event.
Lombard Public Works Department to Conduct Spring Hydrant Flushing
April 2017 - Lombard Public Works crews has just begun flushing more than 2,700 hydrants as part of the Village’s annual spring hydrant flushing program, which will continue for six weeks. The program is a vital part of the Village’s water pumping and water distribution system maintenance schedule. During flushing, each hydrant is thoroughly inspected and operated. Flow readings are taken to evaluate system capability to provide sufficient water supply in which low flows may indicate a water main valve is closed or not operating properly.
The large volumes of water moved through the water mains during flushing scours the internal walls of the mains, freshens the water in the distribution system, and fluctuates water storage tank levels. This activity allows water operators to monitor the system’s response to pressure fluctuations and test system performance during peak usage.
During hydrant flushing, water pressures may drop temporarily when crews are in the area. Water may also be rusty (a reddish color caused by iron deposits) and cloudy or “milky”, which is caused by undissolved oxygen in the water that dissipates within a few minutes. These conditions do not affect the quality and safety of the water, only appearance.
For discolored or cloudy water, shut off the water and wait several minutes, then run the cold water for a few minutes or until the water clears. Avoid doing laundry during hydrant flushing as white clothes may become stained if the water is not properly cleared first. Wash a load of dark clothes first before doing a load of white clothes. If water pressure or flow seems low, check the faucet aerator screen for sediment, and avoid running tap water and washing clothes until the flushing is completed. Drive carefully around any open flowing hydrant, watch for Public Works personnel, and please keep children away.
Direct questions regarding hydrant flushing to the Public Works Department at (630) 620-5740, or via email at firstname.lastname@example.org.
Map of 2016-2018 Fall Hydrant Flushing