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Provides stream water quality monitoring data for a number of parameters, including total and dissolved nutrients, metals, and chloride. The Provincial (Stream) Water Quality Monitoring Network (PWQMN) measures water quality in rivers and streams across Ontario. This dataset provides stream water...

This dataset contains measurements of pesticide concentrations in stream water samples collected at selected streams in Ontario. The Ministry of the Environment, Conservation and Parks (MECP) and Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) jointly collaborate to monitor...

In 2017, the Ministry of Environment, Conservation, and Parks collected water and sediment from the Jackfish Bay ‘Area of Concern in Recovery’ study area, which included Moberley Bay, Tunnel Bay, and far-field sites in Jackfish Bay. This ‘Area of Concern in Recovery’ has been designated under...

Industrial wastewater monitoring data submitted quarterly to the Ministry of the Environment. This reporting is required by the Effluent Monitoring and Effluent Limits (EMEL/MISA) Regulations. Data is available by individual years. [EMEL]: Effluent Monitoring and Effluent Limits [MISA]: Municipal...

Every year, the Ministry of the Environment Conservation and Parks publicly releases the Environmental Compliance Report on the Ontario Data Catalogue. In Ontario, all facilities with regulated wastewater discharges or air emissions under the Ontario Water Resources Act and the Environmental...

Data on fish contaminants is collected across Ontario. Contaminants are chemicals that could be harmful to environment and human health. Toxic contaminants can enter in waterbodies in different ways and can accumulate in fish. Contaminants include: * mercury * polychlorinated biphenyls (PCBs) *...

The Wastewater Systems Effluent Regulations (WSER), developed under the Fisheries Act, came into force in 2012 to manage wastewater releases by systems that collect an average daily influent volume of 100 cubic metres or more. The WSER also does not apply to any wastewater system located in the...