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The Official Site of The City of Markham

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If you are in danger or there is a threat to life and safety, call 911 immediately.

  • To report sewer back-up, localized flooding on municipal roads, blocked catch basins or other municipal infrastructure, call the City of Markham at 905.477.7000. 
  •  For hydro-related questions including safety tips for flooding, call Alectra’s Customer Service at 1.877.963.6900 and Press 2.
  • To report river flooding, call TRCA floodline at 416.661.6514.

If you see any potential property damage, call your insurance representative as soon as possible.

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