Median values of monthly maximum turbidity in raw surface water sources by drainage region, 2013
Map 2.3
Description for Map 2.3
The title of this map is "Median values of monthly maximum turbidity in raw surface water sources by drainage region, 2013." On this map, the darker the colour the higher the median monthly turbidity value (in nephelometric turbidity units) for each drainage region. Category 1 (dark brown) is 11.0 to less than 21.0 NTUs, Category 2 (medium brown) is 7.0 to less than 11.0 NTUs, Category 3 (brown) is 4.0 to less than 7.0 NTUs, Category 4 (light brown) is 2.0 to less 4.0 NTUs, Category 5 (cream) is 0.6 to less than 2.0 NTUs while Category 6 (white) represent regions where data are not available.
In 2013, monthly maximum turbidity values for surface water sources were highest in the Lower Saskatchewan–Nelson, North Saskatchewan and Assiniboine–Red drainage regions in the Prairies and in the St. Lawrence drainage region, while the lowest levels were seen in drainage regions in British Columbia and the Atlantic provinces.
Each drainage region boundary is outlined in black and labeled with a number to identify the area. A table is included which provides the full name of each drainage region, grouped by ocean drainage areas. The locations and names of some major cities in each province and territory are included on the map. Land areas outside of Canada are coloured light grey. Water is pale blue and major bodies, like oceans and bays, are named.
Note: Data are for raw surface water sources from facilities that reported turbidity data for at least 10 months in 2013. These facilities served 24 million people and produced 4,091 million cubic metres of potable water from surface water sources in 2013. Source water turbidity was monitored continuously at 42% of these drinking water plants in 2013, was monitored at least daily at 34% of plants and was monitored less frequently at the rest.
Source: Statistics Canada, 2015, "Source water quality, 2013," Environment Fact Sheets, Catalogue no. 17-508-X.
Category | Nephelometric turbidity units | Colour |
---|---|---|
1 | 11.0 to < 21.0 | Dark brown |
2 | 7.0 to < 11.0 | Medium brown |
3 | 4.0 to < 7.0 | Brown |
4 | 2.0 to < 4.0 | Light brown |
5 | 0.6 to < 2.0 | Cream |
6 | Data not available | White |
Ocean drainage areas and drainage regions | Code | Median monthly maximum turbidity, 2013 |
---|---|---|
number | nephelometric turbidity units | |
Pacific Ocean | ||
Pacific Coastal | 1 | 0.9 |
Fraser–Lower Mainland | 2 | 1.4 |
Okanagan–Similkameen | 3 | 1.4 |
Columbia | 4 | 0.7 |
Yukon | 5 | Note ..: not available for a specific reference period |
Arctic Ocean | ||
Peace–Athabasca | 6 | 5.0 |
Lower Mackenzie | 7 | 4.6 |
Arctic Coast–Islands | 8 | Note F: too unreliable to be published |
Gulf of Mexico | ||
Missouri | 9 | Note F: too unreliable to be published |
Hudson Bay | ||
North Saskatchewan | 10 | 9.0 |
South Saskatchewan | 11 | 6.3 |
Assiniboine–Red | 12 | 7.7 |
Winnipeg | 13 | 2.4 |
Lower Saskatchewan–Nelson | 14 | 20.9 |
Churchill | 15 | 4.5 |
Keewatin–Southern Baffin Island | 16 | Note F: too unreliable to be published |
Northern Ontario | 17 | 4.9 |
Northern Quebec | 18 | Note F: too unreliable to be published |
Atlantic Ocean | ||
Great Lakes | 19 | 5.0 |
Ottawa | 20 | 4.1 |
St. Lawrence | 21 | 9.8 |
North Shore–Gaspé | 22 | 1.5 |
Saint John–St. Croix | 23 | 1.1 |
Maritime Coastal | 24 | 1.4 |
Newfoundland–Labrador | 25 | 0.7 |
..: not available for a specific reference period F: too unreliable to be published |
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