Fall cleaning of City water mains begins October 13

Minor water interruptions mean fresher water for Guelph

The City will begin cleaning water mains in selected areas of Guelph starting Monday, October 13. Cleaning will take place between the hours of 9 p.m. and 6 a.m.

The City aims to complete all water main cleaning activities by October 30.

View the map of where we’ll be flushing water mains.

View the map of where we’ll be swabbing water mains.

What to expect

  • Businesses in areas where water mains are being cleaned will receive a notice 2-3 weeks in advance and follow-up phone call several days before cleaning starts on their street.
  • Residents will receive a notice approximately 1 week before cleaning is scheduled and a reminder notice on their door (where access is permitted) 36-48 hours before cleaning starts on their street.
  • Tap water should not be used during cleaning times. Store tap water in pots, jugs or your bathtub before cleaning starts.
  • Water service may be interrupted, water pressure may be low or water may appear discoloured during cleaning.
  • No chemicals are used in water main cleaning. Special scrubbers and water pressure are used to clean water mains.

Drinking small amounts of discoloured water is unlikely to cause health issues. However, the City recommends waiting until water runs clear before drinking it. To clear discoloured water, run a cold water tap for five to fifteen minutes.

Why we clean water mains

Water main cleaning ensures customers receive the freshest water possible. Cleaning removes buildup of natural minerals such as iron and manganese. This reduces the chance that water will become discoloured.


Water main and sewer cleaning

For more information

Water Services
[email protected]