Municipal wastewater treatment

The Canadian Environmental Sustainability Indicators (CESI) program provides data and information to track Canada's performance on key environmental sustainability issues. The Municipal wastewater treatment indicator The municipal wastewater treatment indicators measure the level of wastewater treatment provided to the Canadian population and track the compliance of the treated water discharged with the national effluent quality standards. Higher treatment levels of wastewater reduce the risk of raw wastewater pollutants entering the environment, where they pose risks to human health and the environment. This indicator is not a measure of municipalities' compliance with municipal, provincial or federal wastewater regulations or treatment standards. 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 data sources and details on how those data were collected and how the indicator was calculated.

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

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 18:04 (UTC)
Created	April 17, 2026, 18:04 (UTC)
contact_email	Indicateurs-indicators@ec.gc.ca
contact_person	{}
criticality_level	[]
data_dictionary	[]
geographic_scope	["0"]
open_canada_collection	primary
open_canada_date_published	2025-09-25 00:00:00
open_canada_keywords	{"en": ["Water pollution", "Environment", "Waste water", "Environmental indicators", "CESI", "environmental indicators", "water", "water quality", "pressures on water quality", "wastewater", "water treatment", "municipalities", "stormwater", "sanitary sewage", "municipal wastewater", "sewer system", "discharge", "primary treatment", "secondary treatment", "tertiary treatment", "pollution", "chemicals", "nutrients"], "fr": ["Pollution de l'eau", "Environnement", "Eaux usées", "Indicateur environnemental", "ICDE", "indicateurs environnementaux", "eau", "qualité de l'eau", "pressions sur la qualité de l'eau", "eaux usées", "traitement des eaux", "municipalités", "eaux usées municipales", "réseau d'égouts", "traitement primaire", "traitement secondaire", "traitement tertiaire", "pollution", "nutriments", "chimiques"]}
open_canada_subject	["nature_and_environment"]
sensitivity_level	unrestricted
title_fr	Traitement des eaux usées municipales
update_frequency	as_needed