Water Main Flushing



The spring and fall water main flushing program is carried out to remove sediments that have accumulated in the water mains. These flushing activities are part of best management practices to ensure that water quality objectives are maintained in the distribution system. This maintenance procedure may result in temporary inconveniences to you such as reduced water pressure or red (discoloured) water.

Flushing takes place once in the spring and once in the fall, exact dates will be posted on the web and in the local newspaper closer to the program start up.

  • Reduced water pressure should only be intermittent as the hydrants are being flushed. The pressure will return to normal once the flushing is completed.
  • If you detect discoloured (red) water, turn off your tap for 20 to 30 minutes; this should allow work crews enough time to complete the flushing. When work crews have left the area, turn on one COLD water tap for a few minutes to flush the system.
  • Discoloured water may occur in close proximity to the watermain flushing or many blocks away, depending on various factors such as their supply main size, location and demand flows. Unfortunately, it is impossible to predict the location and extent of the customers that may receive discoloured water.
  • Residents who live in the areas being flushed may want to collect containers of water for drinking and cooking, each day before the flushing program starts.
  • We recommend that you do not drink or wash laundry with red water.