Water Chemistry (Great Lakes Nearshore Areas)

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 reference stations throughout the Great Lakes basin
Ministry contact: Environment, Conservation and Parks

Additional information

Tags
Geographic coverage
Ontario
Update frequency
Yearly

Water Chemistry (Great Lakes Nearshore Areas)

Learn more about accessing data using different formats.

Date range: January 1, 2002 - December 31, 2022

  • ZIP
    Lake Erie Light Profiles (2004, 2007, 2010, 2016, 2019) English

    Last Updated: June 18, 2025

    Light Profile Data: Zip file contains Excel files

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  • ZIP
    Lake Huron Light Profiles (2002, 2003, 2009, 2015, 2022) English

    Last Updated: June 18, 2025

    Light Profile Data: Zip file contains Excel files

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  • ZIP
    Lake Ontario Light Profiles (2003, 2006, 2009, 2012, 2018) English

    Last Updated: June 18, 2025

    Light Profile Data: Zip file contains Excel files

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  • ZIP
    Lake Superior Light Profiles (2005, 2011, 2019) English

    Last Updated: June 18, 2025

    Light Profile Data: Zip file contains Excel files

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Date range: January 1, 2000 - December 31, 2023

  • CSV
    GLIS Water Chemistry 2000-2023 English

    Last Updated: February 2, 2026

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Supporting Files

  • PDF
    Metadata record English
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  • PDF
    Metadata record French
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