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Water Flushing Programs

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Water Main Flushing and Hydrant Inspection Programs

Regular flushing and inspection is an important component of a comprehensive water management program. Water Main Flushing and Fire Hydrant Inspections are generally completed between April and October each year.

Unidirectional Water Main FlushingUD Flushing

Unidirectional water main flushing allows the Utility to maintain water clarity and quality in the distribution system. Sediment in the water mains reduces the effectiveness of disinfectants (chlorine) used to fight the growth of bacteria in the water system. By removing the sediment, we can reduce the level of chlorine used to disinfect the water. To remove this sediment, water is moved through a water main at a high velocity so that a scouring action is created and then the water is discharged through a fire hydrant. The ultimate goal of this program is to ensure that water quality is maintained at its optimal level and to help with the proper maintenance of the City’s water distribution lines and verification that water main valves are in proper working order. 

Fire Hydrant Inspections

Hydrant InspectionHydrant inspections are necessary to test each hydrant for adequate flow, pressure and operation. It allows field operators to inspect the hydrant for obstructions and to allow for repairs, as required, to ensure the City owned fire hydrants remain in peak performance. The inspection process involves flushing the hydrant and operating the branch valve which can stir up sediment in the water main that the hydrant is attached to.
Temporary Affects to Water Supply

Discolouration of water may occur during both operations as particles are moved through and cleared from the water mains. This discolouration is caused by mineral deposits that settle in the water mains which are agitated during the flushing processes.

If you notice discoloured water in your home, please note that discoloured water should not be used for laundry. Washing clothes, especially with chlorine bleach, when water is discoloured will stain laundry.

Water pressure may fluctuate during the flushing and inspection processes. Low pressure experienced due to these processes will resolve once the flushing is completed.

Water Remains Safe During Flushing

water tap running

During these routine operations the water remains safe. When flushing operations have completed, it is recommended that residents run a cold water faucet or turn on an outside sprinkler for approximately 5-20 minutes or until the water clears.

If water remains discoloured, flushing operations may still be occurring in the vicinity of your home; we recommend that you wait and try again. Should discoloured water continue beyond three hours, you may choose to contact Environmental Utilities at 403.529.8176 for further direction.

Current Flushing and Inspection Operations

 Unidirectional Flushing
 Field Operators are currently working on Unidirectional Flushing activities in: Zone 15
 It is anticipated that flushing operations will next move into: Zone 27
 Unidirectional Flushing Zone Map (PDF)
 Fire Hydrant Inspections
 Field Operators are currently completing Fire Hydrant Inspections in: Zone H
 It is anticipated that inspections will next move into: Zone J
 Fire Hydrant Inspection Zone Map (PDF)

Please Note: In addition to the routine flushing operations, there may be additional flushing completed in some areas of the City requiring more frequent attention. Unless the flushing activities are expected to last more than one day, the zone will not be noted above for these various locations.

Additional Information

Field Operators are currently working on Unidirectional Flushing activities in: Zone 32
Field Operators are currently working on Unidirectional Flushing activities in: Zone 32
Field Operators are currently working on Unidirectional Flushing activities in: Zone 32
Field Operators are currently working on Unidirectional Flushing activities in: Zone 32
Field Operators are currently working on Unidirectional Flushing activities in: Zone 32

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