Pesticide Concentrations in 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 Agribusiness (OMAFA) jointly collaborate to monitor pesticides in selected tributaries in southern Ontario. There are currently 19 monitoring sites within watershed or predominately agricultural land. The data includes:

  • Location of 21 stations (19 of which are currently active)
  • Pesticide concentration levels

Keywords: pesticides, pollution

Ministry contact: Environment, Conservation and Parks

Additional information

Tags
Geographic coverage
Ontario
Update frequency
Yearly

Pesticide Concentrations in Stream Water

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Date range: January 1 - December 31, 2024

  • CSV
    Data 2024 English

    Last Updated: February 3, 2026

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Date range: January 1 - December 31, 2023

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    Data 2023 English

    Last Updated: June 20, 2025

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Date range: January 1 - December 31, 2022

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    Data 2022 English

    Last Updated: January 18, 2024

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Date range: January 1 - December 31, 2021

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    Data 2021 English

    Last Updated: January 19, 2024

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Date range: January 1 - December 31, 2020

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    Data 2020 English

    Last Updated: April 6, 2022

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Date range: January 1, 2012 - December 31, 2019

  • XLSX
    Data 2019 English

    Last Updated: August 4, 2021

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Supporting Files

  • XLSX
    Limits of Detection and Quantification English

    Last Updated: February 3, 2026

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  • XLSX
    Coordinates English

    Last Updated: December 3, 2020

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  • PDF
    Metadata English [23.1 KiB]

    Last Updated: February 20, 2024

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  • PDF
    Metadata French

    Last Updated: February 20, 2024

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