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Utilities Kingston website

The Kingston waterfront is a clean, safe place to swim, fish or boat. But you should know about the added risk of pollution that can occur after heavy rainfall.

Our partners at KFL&A Public Health caution that lake bacteria levels are higher after heavy rainfall, and swimming is not recommended for 48 hours.

During and after heavy rainfall, sewer overflow points may discharge diluted sewage into the environment and contribute to this pollution. Utilities Kingston now provides this information on a real-time map to help you make a better-informed decision about recreational water use. Consider this information along with public health precautions.

To reduce overflows, Utilities Kingston and the City of Kingston have set a 20-year target to separate 100 per cent of the combined sewers in the municipal sewer system, by 2043. Learn more about how we're working to reduce sewer overflows. 

Questions or concerns? Call customer service at 613-546-1181, Monday through Friday, from 8 a.m. to 4:30 p.m. You can also view a historical log of sewage overflows.

Warning: contact with polluted water can make people and pets sick.

Consider this information for at least 48 hours after a sewer overflow has occurred at a specific location. Check the map for status updates. The legend on the map explains the symbols to look for and what they mean to water users.

Click on each CSO outfall symbol to learn more. Click on the [+] or [-] symbols to zoom in or out.

Sewer Overflow Map

View a full-sized map, and disclaimer, in a new window


  • Sewer is currently overflowing Sewer is currently overflowing
  • An overflow event occurred in the last 48 hours An overflow event occurred in the last 48 hours
  • No overflow has occurred in 48 hours No overflow has occurred in 48 hours
  • Monitor temporarily out of service Monitor temporarily out of service
  • No live data available No live data available

Recent history of sewer overflows

The following location(s) experienced a sewage overflow discharge in the last 48 hours:

  • Lake Ontario at the shoreline at the east end of William Street
There are no additional locations that have overflowed in the last 48 hours.