Local Freshwater Quality in Canada
For the 2009 to 2011 period, freshwater quality was rated at 334 monitoring sites across Canada to evaluate if chemicals in water and physical properties were at levels that could harm aquatic plants and animals.Footnote  These include the core sites used in the national freshwater quality indicator and additional local sites. Core sites were chosen based on their ability to represent key human pressures on water in Canada’s most populated drainage regions. Local sites are included to provide more local information about freshwater quality but are not used to assess overall freshwater quality in Canada.
Freshwater quality at monitoring sites for the 2009 to 2011 period, Canada
The map shows the freshwater quality indicator ratings (excellent, good, fair, marginal and poor) for the period 2009 to 2011 for 334 monitoring sites across Canada. From these sites, 172 core sites are used to calculate the national histogram, while the 162 local sites are included to provide more local information.
Note: Freshwater quality was assessed using the Canadian Council of Ministers of the Environment’s Water Quality Index. Care must be taken when comparing regions because different parameters and guidelines are used to assess water quality across provinces and territories.
Source: Data were assembled by Environment Canada from existing federal, provincial, territorial and joint water quality monitoring programs.
- Freshwater Quality in Canadian Rivers
- Regional Freshwater Quality in Canadian Rivers
- Canada’s Freshwater Quality in a Global Context
- Land Use Impacts on Freshwater Quality
- Municipal Wastewater Treatment
- Household Use of Chemical Pesticides and Fertilizers
- Footnote 1
Water quality is assessed using the Canadian Council of Ministers of the Environment’s Water Quality Index using water quality guidelines for the protection of aquatic life. For more details about how the indicator is calculated, please refer to the Data Sources and Methods document.
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