"Percentage of reporting municipal wastewater systems and effluent volume meeting effluent quality regulatory standards, Canada, 2015 to 2023",,,, ,,,, Year,Number of municipal wastewater systems meeting effluent quality regulatory standards,Proportion of reporting municipal wastewater systems meeting effluent quality regulatory standards (percentage),Volume of municipal effluent meeting quality regulatory standards (million of cubic metres),Proportion of volume of municipal effluent meeting quality regulatory standards (percentage) 2015,"1,099",81,"3,302",66.2 2016,"1,122",81.1,"3,537",69.6 2017,"1,079",77.6,"3,769",68.6 2018,"1,434",75.6,"3,744",68.3 2019,"1,441",77.9,"3,747",68.8 2020,"1,409",74.7,"3,873",69.9 2021,"1,391",76.2,"3,612",70.8 2022,"1,370",76.5,"3,895",71.4 2023,"1,430",78.1,"4,189",71.3 ,,,, "Note: Only the municipal wastewater systems with a daily flow of 100 m3 or more that submitted their monitoring reports were considered. Data were unavailable for the populations located in the Northwest Territories, Nunavut and north of the 54th parallel in the provinces of Quebec and Newfoundland and Labrador.",,,, Source: Environment and Climate Change Canada (2025) Wastewater Systems Effluent Regulations Program.,,,, Available on the Environmental indicators website (www.canada.ca/environmental-indicators).,,,,