Welland Combined Sewer Overflows at Niagara Region Facilities

Data presented here is updated every three months. The data contains records from
May 01, 2017 to April 30, 2018.

CSO Location Date of OverflowVolumeReason for Overflow
Welland Plant
[map it ]
Apr 25, 201823.110 Heavy Precipitation
Welland Plant
[map it ]
Apr 15, 2018168.872 Heavy Precipitation
Welland Plant
[map it ]
Apr 6, 201829.260 Heavy Precipitation
Welland Plant
[map it ]
Apr 4, 20186.074 Heavy Precipitation
Welland Plant
[map it ]
Mar 29, 201897.129 Heavy Precipitation
Welland Plant
[map it ]
Feb 19, 2018229.417 Heavy Precipitation
Welland Plant
[map it ]
Feb 15, 201891.994 Snow Melt
Welland Plant
[map it ]
Jan 22, 201861.724 Heavy Precipitation
Snow Melt
Welland Plant
[map it ]
Jan 11, 2018113.793 Heavy Precipitation
Snow Melt
Welland Plant
[map it ]
Dec 5, 201722.605 Heavy Precipitation
More

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

Historical Overflow Data for Welland

201720162015
Total Overflows: 27
Total Volume: 1235.354
Total Overflows: 13
Total Volume: 431.554
Total Overflows: 16
Total Volume: 868.665

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?