"Estimated total phosphorus loading to Lake Erie, 2010 to 2024",,, ,,, Year,Total phosphorus loading United States portion (tonnes per year),Total phosphorus loading Canada portion (tonnes per year),Total phosphorus loading Basin total (tonnes per year) 2010,"4,769",903,"5,672" 2011,"8,817","2,758","11,575" 2012,"7,161","1,304","8,465" 2013,"6,648","1,989","8,637" 2014,"6,491","2,596","9,087" 2015,"5,313","1,457","6,770" 2016,"4,578","1,135","5,713" 2017,"8,993","1,791","10,784" 2018,"9,395","2,412","11,807" 2019,"10,944","2,592","13,536" 2020,"7,702","1,992","9,693" 2021,"5,747","1,572","7,318" 2022,"7,292","2,108","9,400" 2023,"6,233","2,135","8,368" 2024,"5,300","2,237","7,537" ,,, "Note: Basin total values include loadings from runoff and tributaries in Canada and the United States, loadings from Lake Huron and atmospheric sources of phosphorus. Half of the total phosphorus loadings from atmospheric sources and half of those from Lake Huron were allocated to each country. 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).,,,