Grimsby Combined Sewer Overflows at Niagara Region Facilities

Data presented here is updated every three months. The data contains records from
September 01, 2017 to August 31, 2018.

CSO Location Date of OverflowVolumeReason for Overflow
Woodsview SPS
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Jun 27, 2018N/A Heavy Precipitation
Baker Road Plant
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Apr 16, 201822.172 Heavy Precipitation
Snow Melt
Grimsby Works Yard CSO
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Apr 16, 201816.383 Heavy Precipitation
Snow Melt
Biggar Lagoon CSO SPS
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Apr 16, 20186.349 Heavy Precipitation
Snow Melt
Old Orchard SPS
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Apr 16, 201814.044 Heavy Precipitation
Woodsview SPS
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Apr 16, 2018N/A Heavy Precipitation
Woodsview SPS
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Apr 4, 2018N/A Heavy Precipitation
Snow Melt
Old Orchard SPS
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Apr 4, 20180.856 Heavy Precipitation
Old Orchard SPS
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Feb 15, 20180.655 Heavy Precipitation
Grimsby Works Yard CSO
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Oct 9, 20170.121 Heavy Precipitation
More

Volume is measured in megalitres. (1 megalitre = 1 million litres)

Historical Overflow Data for Grimsby

201720162015
Total Overflows: 32
Total Volume: 132.238
Total Overflows: 11
Total Volume: 9.925
Total Overflows: 6
Total Volume: 1.303

Overflows contain mostly Storm Water

While the volume of an overflow may seem large, the amount of untreated sewage present in the overflow is small when compared to the amount of stormwater or snow melt.

Niagara typically treats about 80,000 megalitres of sewage each year.  The vast majority of wastewater discharged into the sewer system receives full treatment and only a small percentage of this sewage overflows. These overflows usually only occur during periods of heavy rain or during seasonal snow melts.

Historical Data

If you require more detailed information about a specific combined sewage overflow, you can contact the water & wastewater division.


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