Municipal Wastewater Systems in Canada, 2017

Release date: June 25, 2019
Municipal Wastewater Systems in Canada
Description: Municipal Wastewater Systems in Canada, 2017

Municipal Wastewater Systems in Canada, 2017

Volumes of provincial wastewater (sewage) discharged by treatment category 2017 (millions of cubic metres)
  Categories of Treatment
Combined Sewer Overflows (CSOs)Footnote 1 No treatmentFootnote 2 Primary treatmentFootnote 3 Secondary treatmentFootnote 4 Tertiary treatmentFootnote 5
Canada 164 106 1,535 2,827 1,442
Yukon 0 0 0 4 0
British Columbia 40 38 256 315 51
Alberta 5 0 1 69 325
Saskatchewan 0 0 0 47 39
Manitoba 7 0 3 113 28
Ontario 21 0 13 1,237 811
Quebec 54 7 1,114 887 165
New Brunswick 14 0 23 82 1
Prince Edward Island 0 0 0 11 3
Nova Scotia 24 19 71 44 17
Newfoundland and Labrador 0 42 56 15 1
Footnote 1

Combined Sewer Overflows (CSOs) are from sewers that convey both stormwater and wastewater (sewage) that overflow into receiving waters (lakes, rivers or oceans) without treatment.

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Footnote 2

No treatment indicates wastewater (sewage) discharged into receiving waters (lakes, rivers or oceans) without treatment.

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Footnote 3

Primary treatment removes a portion of suspended solids and organic matter by physical and/or chemical processes.

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Footnote 4

Secondary treatment removes biodegradable organic matter and suspended solids using biological treatment processes and secondary settlement.

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Footnote 5

Tertiary treatment further removes residual suspended solids, nutrients and/or other contaminants using various physical, chemical or biological processes.

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Source: Statistics Canada, Environment, Energy and Transportation Statistics Division, Municipal Wastewater Systems in Canada.

Units of measurement — Data is published in millions of cubic metres, there are 1,000 litres in a cubic metre.

Data for Nunavut and the Northwest Territories are not available.

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