"Status of total phosphorus and total nitrogen concentration exceedances for the 2021 to 2023 period in the St. Lawrence River, Canada",,,, ,,,, Monitoring station,2021 to 2023 total phosphorus guideline exceedance (percentage),Total phosphorus status,2021 to 2023 total nitrogen guideline exceedance (percentage),Total nitrogen status Wolfe Island,0,Good,17,Fair Cornwall,0,Good,9,Good Châteaugay,92,Poor,100,Poor Carillon,8,Good,33,Fair Îles-de-Boucherville,0,Good,0,Good Île Sainte-Thérèse,50,Fair,100,Poor Lavaltrie,69,Poor,69,Poor Saint-François,27,Fair,100,Poor Lac Saint-Pierre North,100,Poor,83,Poor Lac Saint-Pierre South,88,Poor,88,Poor Bécancour South,33,Fair,50,Fair Québec,54,Poor,20,Fair Île d'Orléans,0,Good,0,Good ,,,, "Note: For the purposes of this indicator, the phosphorus guideline is 0.03 mg P/L and the nitrogen guideline is 0.65 mg N/L. For more details about the water quality guidelines and categories, please refer to the Data sources and methods (www.canada.ca/en/environment-climate-change/services/environmental-indicators/nutrients-st-lawrence-river.html#guidelines).",,,, Source: Environment and Climate Change Canada (2023),,,, Available on the Environmental indicators website (www.canada.ca/environmental-indicators).,,,,