There are combined sewer overflows located in both Regional and municipal infrastructure throughout Niagara.
Overflows allow excess water to exit the sewer systems when pipes can not handle the increased flows due to wet weather and melting snow. Overflows prevent
sewage from backing up into basements. Learn more about
how overflows work.
Niagara Region updates the data on recent overflows four times a year. The data presented below
contains records from
September 01, 2020 to
August 31, 2021.
Residents seeking information on a specific overflow outside of the normal reporting period can contact the water and wastewater division.
Historical data on combined sewage overflows
The overflow information displayed pertains to overflows occurring at facilities
owned and operated by Niagara Region. For specific information on local
municipal overflows, the user should contact their local municipality.
Choose a city or town from the following list to see information about recent combined sewer overflows:
Niagara Region has no sewers in Wainfleet.
During wet weather, the sewage normally present in the sewer is highly diluted by the incoming storm water. The volume discharged may appear large, but the actual amount of sewage present in the discharge in relation to the amount of storm water is much lower.
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