"Estimated total phosphorus loading to Lake Erie by source, Canada, 2010 to 2024 ",,,,, ,,,,, Year,Total phosphorus loading from point sources (tonnes per year),Total phosphorus loading from non-point sources (tonnes per year),Total phosphorus loading atmospheric (tonnes per year),Total phosphorus loading from Lake Huron (tonnes per year),Total phosphorus loading from all sources (tonnes per year) 2010,132,427,184,161,903 2011,147,"2,173",277,161,"2,758" 2012,131,837,175,161,"1,304" 2013,141,"1,429",258,161,"1,989" 2014,143,"2,115",177,161,"2,596" 2015,129,998,169,161,"1,457" 2016,125,671,179,161,"1,135" 2017,127,"1,230",273,161,"1,791" 2018,120,"1,864",267,161,"2,412" 2019,126,"2,144",162,161,"2,592" 2020,126,"1,506",199,161,"1,992" 2021,104,"1,090",216,161,"1,572" 2022,108,"1,682",158,161,"2,108" 2023,102,"1,730",142,161,"2,135" 2024,104,"1,721",251,161,"2,237" ,,,,, "Note: The total phosphorous loadings from atmospheric sources and from Lake Huron were halved to roughly estimate the Canadian contributions. Loadings from Lake Huron are estimates from models. Values are rounded to the nearest whole number. Totals may not add up due to rounding. For more information, see the Data sources and methods section (https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/phosphorus-loading-lake-erie.html#DSM).",,,,, Source: Environment and Climate Change Canada (2025) Freshwater Quality Monitoring and Surveillance Division.,,,,, Available on the Environmental indicators website (www.canada.ca/environmental-indicators).,,,,,