From 1994 to 2019, the Environmental Commissioner of Ontario (ECO) served as the province's environmental watchdog. Appointed by an all-party committee, the ECO was an independent officer of the Ontario Legislature tasked with:
- Promoting and providing advice and assistance about the Environmental Bill of Rights, 1993 (EBR);
- Reporting on the implementation of, and compliance with, the EBR; and
- Reporting on Ontario’s progress reducing greenhouse gas emissions and improving energy conservation and efficiency.
As of April 1, 2019, the ECO became a part of the Office of the Auditor General of Ontario. This change occurred under Schedule 15 of the Restoring Trust, Transparency and Accountability Act, 2018.