Datasets
Search for specific datasets or use filters to explore our data.
-
Lake Ontario Downstream Tributary Water Chemistry Monitoring
Ministry: Environment, Conservation and Parks
From 2018 to 2023, ministry staff collected water quality samples year-round from seven rivers that flow into Lake Ontario in the Greater Toronto Area. They did this to...Resource formats:
- XLSX
-
Well Records
Ministry: Environment, Conservation and Parks
This dataset provides information submitted by well contractors as prescribed by Regulation 903, and is stored in the Water Well Information System (WWIS). Spatial information...Resource formats:
- ZIP
- SHP
-
Ontario water and weather monitoring stations
Ministry: Natural Resources and Forestry
Point locations of water and weather monitoring stations used by the Surface Water Monitoring Centre to assess flood and drought conditions across Ontario. Monitoring station...Resource formats:
- SHP
-
Environmental Compliance Reports
Ministry: Environment, Conservation and Parks
Every year, the Ministry of the Environment Conservation and Parks publicly releases the Environmental Compliance Report on the Ontario Data Catalogue. In Ontario, all...Resource formats:
- CSV
- XLSX
- ZIP
-
Multi-Watershed Nutrient Study
Ministry: Environment, Conservation and Parks
The Multi-Watershed Nutrient Study collected stream water samples from 11 small agricultural watersheds between 2014 and 2020. Samples were collected during flow events like...Resource formats:
- ZIP
- CSV
- SHP
-
Permit to Take Water
Ministry: Environment, Conservation and Parks
Companies or organizations who take over 50,000 litres of water/day from a lake, river, stream or groundwater source, must obtain a Permit to Take Water from the Ministry of the...Resource formats:
- SHP
- XLS
-
Industrial Wastewater Discharges
Ministry: Environment, Conservation and Parks
Industrial wastewater monitoring data submitted quarterly to the Ministry of the Environment. This reporting is required by the Effluent Monitoring and Effluent Limits...Resource formats:
- XLS
- XLSX
-
Air Quality Stations
Ministry: Environment, Conservation and Parks
The air monitoring stations measure up to 6 common pollutants like: ground-level ozone fine particulate matter nitrogen dioxide carbon monoxide sulphur dioxide total reduced...Resource formats:
- CSV
- ZIP
- TXT
-
Water Taking
Ministry: Environment, Conservation and Parks
Volumes of water taken daily and annually under a Permit-to-Take-Water, as reported to the ministry under the Water Taking and Transfer Regulation 387/04. The Ontario Water...Resource formats:
- CSV
- XLSX
-
Lake Simcoe Monitoring
Ministry: Environment, Conservation and Parks
The Lake Simcoe lake monitoring program provides measurements of chemical and physical water quality limits such as total phosphorus, nitrogen, chlorophyll a, pH, alkalinity,...Resource formats:
- ZIP
- SHP
-
Ontario Watershed Boundaries
Ministry: Natural Resources and Forestry
This collection represents the authoritative watershed boundaries for Ontario. The data is based on a framework similar to the Atlas of Canada Fundamental Drainage Areas and the...Resource formats:
- WEB
-
Jackfish Bay Area of Concern in Recovery – Water and Sediment Chemistry
Ministry: Environment, Conservation and Parks
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...Resource formats:
- CSV
- XLSX
-
Municipal Treated Wastewater Effluent
Ministry: Environment, Conservation and Parks
The flows and effluent quality data is for the parameters of: Biological Oxygen Demand BOD5/CBOD5 Total Suspended Solids (TSS), also described as Residual Particulate Solids...Resource formats:
- XLSX
-
Air Quality in Ontario 2015
Ministry: Environment, Conservation and Parks
The Air Quality in Ontario Report summarizes the state of ambient air quality in 2015 and 10 year trends for key airborne pollutants affecting Ontario's air quality.Resource formats:
- CSV
-
Fish Contaminants
Ministry: Environment, Conservation and Parks
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...Resource formats:
- XLSX
-
Inland Lakes and Streams – Water Chemistry
Ministry: Environment, Conservation and Parks
This data set includes information on water quality of lakes and streams across Ontario since 1976. It includes: major anions and cations nutrients chlorophyll metals Data...Resource formats:
- ZIP
-
Broadscale Monitoring Program Lake Water Chemistry
Ministry: Environment, Conservation and Parks
In 2005, the Province of Ontario implemented its Ecological Framework for Recreational Fisheries Management, a component of which was the establishment of standardized,...Resource formats:
- CSV
-
Provincial (Stream) Water Quality Monitoring Network
Ministry: Environment, Conservation and Parks
Provides stream water quality monitoring data for a number of parameters, including total and dissolved nutrients, metals, and chloride. The Provincial (Stream) Water Quality...Resource formats:
- CSV
- XLSX
-
Water Chemistry (Great Lakes Nearshore Areas)
Ministry: Environment, Conservation and Parks
Data is collected each year, according to the lake-by-lake cycle. Information includes: water chemistry physical conditions including light profiles approximately 80 index and...Resource formats:
- ZIP
- CSV
-
Provincial Groundwater Monitoring Network
Ministry: Environment, Conservation and Parks
The Provincial Groundwater Monitoring Network (PGMN) datasets report on ambient (baseline) groundwater level and chemistry conditions. Groundwater monitoring mapResource formats:
- SHP
- ZIP
- XLSX