Priority Substances List

The Canadian Environmental Protection Act, 1999 (CEPA 1999, section 76) requires the Ministers of the Environment and of Health to establish a Priority Substances List (PSL) that identifies substances to be assessed on a priority basis to determine whether they are toxic (as defined under Section 64 of the Act) and pose a risk to the health of Canadians or to the environment. Assessments of substances placed on the PSL are the shared responsibility of Environment Canada and Health Canada. A Priority Substance may be a chemical, a group or class of chemicals, effluents or wastes.

Assessments of the first 44 substances placed on the list (PSL1) were completed by February 1994. Following the recommendations of a multi-stakeholder Expert Advisory Panel, 25 substances were added to the list (PSL2).

For more information about the CEPA Priority Substances Assessment Program please contact Environment Canada or Health Canada.

Existing Substances Branch

Environment Canada
351 St. Joseph Blvd.
Gatineau, PQ K1A 0H3
Phone Number: 819-997-0822
Facsimile: 819-953-4936
Website: Canada's Actions on Chemicals

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