City’s Watermain Flushing Program To Start This Week

The City’s annual watermain flushing program is now underway and will run for the next 6-8 weeks in zone 2.

Flushing is an important part of the City’s ongoing maintenance program to ensure the integrity of the water supply system. The City of Port Coquitlam flushes one third of the City’s watermains each year in order to minimize sediment deposits in the City’s water system that can deteriorate water quality. Flushing generally take place between the hours of 7 am and 3:30 p.m., Monday to Friday.  

During these times, residents and businesses can expect some discolouration of water and intermittent drops in water pressure. While some discolouration or sediment in the water may occur, it is a temporary condition and is not a health hazard.

Please follow these guidelines during the water main flushing program to clear your water:

  • Turn on a cold water tap and let the water run for a few minutes. Do not choose a tap that has a water filter connected to it, or the sediment may clog your filter. Do not use a hot water tap because it could draw sediment into your hot water tank.
  • Catch some water in a light-coloured cup or container to see if it is clear. You can use your water if it is clear.
  • If the water doesn’t clear in 5 minutes, wait 30 minutes and try again. Please note that water can take up to two hours to clear.

Please direct inquiries to Public Works at 604.927.5496 or email

For more information about the watermain flushing program and to view a map, visit



Ximena Ibacache
Manager of Communications & Administrative Services
City of Port Coquitlam
Tel 604.927.5499