Provincial (Stream) Water Quality Monitoring Network

Description

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 quality monitoring data for a number of parameters, including total and dissolved nutrients, metals, and chloride. Spatial information for stream monitoring locations across Ontario are also available. Keywords: Streamwater, Nutrients, Fresh Water [Stream Water Quality Map](https://www.ontario.ca/page/map-provincial-stream-water-quality-monitoring-network)

Resources

Name Format Description Link
Original metadata (https://data.ontario.ca) HTML https://data.ontario.ca/dataset/967a942d-9397-4e7c-8f42-77fc422c0a37
Original metadata (https://data.ontario.ca/fr) HTML https://data.ontario.ca/fr/dataset/967a942d-9397-4e7c-8f42-77fc422c0a37
Parameter Lookup CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/ANALYTE_PARM_LOOKUP_EN_2025.csv
Data 1964 - 1969 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN_historical/PWQMN_OpenData_1964-1969n.csv
Data 1970 - 1975 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN_historical/PWQMN_OpenData_1970-1975n.csv
Data 1976 - 1979 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN_historical/PWQMN_OpenData_1976-1979n.csv
Data 1980 - 1984 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN_historical/PWQMN_OpenData_1980-1984n.csv
Data 1985 - 1989 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN_historical/PWQMN_OpenData_1985-1989n.csv
Data 1990 - 1994 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN_historical/PWQMN_OpenData_1990-1994n.csv
Data 1995 - 1999 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN_historical/PWQMN_OpenData_1995-1999n.csv
Method Codes xlsx https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/METHOD_CODE_EN2025.xlsx
Code de méthode xlsx https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/METHOD_CODE_FR_2025.xlsx
Data 2000 - 2009 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/PWQMN-2000_2009.csv
Data 2010 - 2018 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/PWQMN-2010_2018.csv
Data 2019 - March 2021 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/PWQMN_2019-2021Marn.csv
Data 2025 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/PWQMN_2025.csv
Data March 2021 - 2024 CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/PWQMN_March2021-2024.csv
Coordinates CSV https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/PWQMN-Stations.csv
Remark Value Qualifiers xlsx https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/REMARK_VALUQUALIF_CODES_EN_2026.xlsx
Qualificatifs de valeur de remarque xlsx https://files.ontario.ca/moe_mapping/downloads/2Water/PWQMN/REMARK_VALUQUALIF_CODES_FR_2026.xlsx
Metadata PDF https://files.ontario.ca/moe_mapping/downloads/metadata/opendata/Prov_Water_Quality_Monitoring_Network _(PWQMN)_metadata_EN_2026.pdf
Metadata PDF https://files.ontario.ca/moe_mapping/downloads/metadata/opendata/Prov_Water_Quality_Monitoring_Network _(PWQMN)_metadata_FR_2026.pdf

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