Chart 1
Municipal wastewater discharges by treatment category, 2020

Canada Newfoundland and Labrador Prince Edward Island Nova Scotia New Brunswick Quebec Ontario Manitoba Saskatchewan Alberta British Columbia Yukon 0 20 40 60 80 100 % Primary treatmentPrimary treatment Secondary treatmentSecondary treatment Tertiary treatmentTertiary treatment No treatment (including CSOs)No treatment (including CSOs)
Note(s):
CSOs: combined sewer overflows.
Source(s):

Chart description


This is a bar stacked chart.

Municipal wastewater discharges by treatment category, 2020, %
  Primary treatment Secondary treatment Tertiary treatment No treatment (including CSOs)
Canada 24.5 47.0 24.8 3.7
Newfoundland and Labrador 48.8 12.9 0.7 37.6
Prince Edward Island 2.0 74.8 23.1 0.0
Nova Scotia 40.8 23.2 10.9 25.1
New Brunswick 18.7 70.8 0.4 10.1
Quebec 48.7 43.0 7.7 0.0
Ontario 0.7 57.7 41.1 0.5
Manitoba 2.2 77.2 16.4 4.1
Saskatchewan 0.0 54.3 45.6 0.1
Alberta 0.0 18.1 79.9 2.0
British Columbia 35.0 46.3 7.0 11.7
Yukon 0.0 100.0 0.0 0.0
Note(s):
CSOs: combined sewer overflows.
Source(s):
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