Nutrients in the St. Lawrence River

Nutrients in the St. Lawrence River 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 Environmental Sustainability Indicators: https://www.canada.ca/environmental-indicators 2024-08-15 Environment and Climate Change Canada indicateurs-indicators@ec.gc.ca Nature and EnvironmentEnvironmental indicatorsWater qualityEnviromental indicatorsCESINutrientswaterwater qualityphosphorousnitrogenSt. Lawrence RiverEnviromental indicatorsCESINutrientswaterwater qualityphosphorousnitrogenSt. Lawrence River Nutrients in the St. Lawrence River – EnglishHTML https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/nutrients-st-lawrence-river.html Nutrients in the St. Lawrence River – FrenchHTML https://www.canada.ca/fr/environnement-changement-climatique/services/indicateurs-environnementaux/elements-nutritifs-fleuve-saint-laurent.html Data sources and methods – EnglishHTML https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/nutrients-st-lawrence-river.html#DSM Data sources and methods – FrenchHTML https://www.canada.ca/fr/environnement-changement-climatique/services/indicateurs-environnementaux/elements-nutritifs-fleuve-saint-laurent.html#DSM Status of total phosphorus and total nitrogen concentrations for the 2021 to 2023 period in the St. Lawrence River – English (CSV; 2.75 kB)CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/nutrients-st-lawrence/2024/1-phosophorus-nitrogen-status.csv Status of total phosphorus and total nitrogen concentrations for the 2021 to 2023 period in the St. Lawrence River – French (CSV; 3.73 kB)CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/nutrients-st-lawrence/2024/1-phosphore-azote-etat.csv Annual percent of phosphorus samples above guideline for 5 water quality monitoring stations along the St. Lawrence River – English (CSV; 4.56 kB)CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/nutrients-st-lawrence/2024/2-phosphorus-annual.csv Annual percent of phosphorus samples above guideline for 5 water quality monitoring stations along the St. Lawrence River – French (CSV; 4.64 kB)CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/nutrients-st-lawrence/2024/2-phosphore-annuelles.csv Annual percent of nitrogen samples above guideline for 5 water quality monitoring stations along the St. Lawrence River– English (CSV; 4.32 kB)CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/nutrients-st-lawrence/2024/3-nitrogen-annual.csv Annual percent of nitrogen samples above guideline for 5 water quality monitoring stations along the St. Lawrence River – French (CSV; 4.39 kB)CSV https://www.canada.ca/content/dam/eccc/documents/csv/cesindicators/nutrients-st-lawrence/2024/3-azote-annuelles.csv

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 Environmental Sustainability Indicators: https://www.canada.ca/environmental-indicators

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