Second Priority Substances List (PSL2) Assessments

The second Priority Substances List (PSL2) was published in 1995, comprising the following substances:

• Acetaldehyde
• Acrolein
• Acrylonitrile
• Aluminum chloride, aluminum nitrate, aluminum sulphate
• Ammonia in the aquatic environment
• 1,3-Butadiene
• Butylbenzylphthalate
• Carbon disulfide
• Chloramines
• Chloroform
• N,N-Dimethylformamide
• Ethylene glycol
• Ethylene oxide
• Formaldehyde
• Hexachlorobutadiene
• 2-Methoxyethanol
• 2-ethoxyethanol
• 2-butoxyethanol
• 2-butoxyethanol ADDENDUM
• N-Nitrosodimethylamine
• Nonylphenol and its ethoxylates
• Phenol
• Releases from primary and secondary copper smelters and copper refineries
• Releases from primary and secondary zinc smelters and zinc refineries
• Respirable particulate matter less than or equal to 10 microns
• Road salts
• Textile mill effluents

The basis for the conclusion of the assessments for these 25 substances is described in a Priority List Assessment Report for each substance. These reports, as well as a document summarizing the health-based measures of dose-response developed from the assessment (Health-Based Guidance Values for Substances On the Second Priority Substances List) are available in hard copy format from eccc.substances.eccc@canada.ca

The process by which the Ministers' Expert Advisory Panel arrived at a recommended set of substances for PSL2 is described in more detail in the Report of the Ministers' Expert Advisory Panel on the second Priority Substances List under the Canadian Environmental Protection Act (CEPA). The scoring and screening of substances are described in more detail in an article by D. Koniecki et al. (Screening candidate substances for the second Priority Substances List under the Canadian Environmental Protection Act. Environ. Carcinogen. Ecotoxicol. Rev. C15(1): 41-59 (1997)).

The following  health assessments are now available for public comment. Information on how to submit comments on these health assessments can be found at the following link: http://www.ec.gc.ca/CEPARegistry.

Priority Substances List Assessment Report: Follow-up to the State of Science Report, 2000 (2007/12/02 - 2008/01/30 - Public comment period) Ethylene Glycol