Data sources and methods – French (French, HTML)

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Publisher-reported update

2024-08-15

The Canadian Environmental Sustainability Indicators (CESI) program provides data and information to track Canada's performance on key environmental sustainability issues. The nutrients in the St. Lawrence River indicator reports on the status of total phosphorous and total nitrogen concentrations along the St. Lawrence River. It ranks the status based on how often total phosphorous and total nitrogen concentrations exceed their respective water quality guidelines. Degraded water quality damages the health of all freshwater ecosystems, such as rivers, lakes, reservoirs and wetlands. When phosphorous and nitrogen concentrations in water become too high, aquatic plant growth can become excessive and harmful. Ongoing tracking of phosphorus and nitrogen concentrations allow governments and citizens to be aware of an important aspect of the river’s environmental condition. Information is provided to Canadians in a number of formats including: static and interactive maps, charts and graphs, HTML and CSV data tables and downloadable reports. See the supplementary documentation for the data sources and details on how the data were collected and how the indicator was calculated. Canadian…

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