Port Colborne Combined Sewer Overflows at Niagara Region Facilities

Data presented here is updated every three months. The data contains records from
November 01, 2016 to October 31, 2017.

CSO Location Date of OverflowVolumeReason for Overflow
Eastside SPS
[map it ]
Oct 10, 2017N/A Heavy Precipitation
Union St SPS
[map it ]
Oct 9, 2017N/A Heavy Precipitation
Eastside SPS
[map it ]
Oct 9, 2017N/A Heavy Precipitation
Port Colborne Plant
[map it ]
May 5, 201713.521 Heavy Precipitation
Union St SPS
[map it ]
May 5, 2017N/A Heavy Precipitation
Union St SPS
[map it ]
May 2, 2017N/A Heavy Precipitation

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

Historical Overflow Data for Port Colborne

201620152014
Total Overflows: 0
Total Volume: N/A
Total Overflows: 4
Total Volume: 17.427
Total Overflows: 3
Total Volume: N/A

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.


Page Feedback Did you find what you were looking for today?