The Ontario Toxics Reduction Act, 2009 (TRA) provided cost-effective benefits that were distinct and broader in scope than the federal Chemicals Management Plan under CEPA. The TRA had potential to make large reductions in toxic discharges over time, particularly if more of its provisions were brought into force. Despite this, however, Ontario proposed to repeal the TRA by the end of 2021. Doing so, significant transparency in toxics reduction could be lost, as well.