As of April 1, 2019, the ECO became part of the Office of the Auditor General of Ontario. This change occurred under the Restoring Trust, Transparency and Accountability Act, 2018.

This website will no longer be updated. Please visit

In addition to three annual reports, the ECO periodically released Special Reports to the Ontario Legislature, as well as technical reports, discussion papers, primers, summaries and other publications. Browse the ECO's reports by type here, or use the search bar at the top of this page to search the website and reports for a keyword or phrase. You can also find report articles on a specific topic on the Environmental Topics page. You can also download groups of reports by type and year using this app.

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