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Measuring Sustainability: Canadian Environmental Sustainability Indicators
Through the Canadian Environmental Sustainability Indicators (CESI) initiative, the federal government reports on environmental indicators that track the long-term trends for issues of key concern to Canadians:

Air Quality
Discover air quality trends in Canada, and near where you live.

Water Quality
Water quality status at the national, regional and local level.

Water Levels
National, regional and local changes in water levels.