In March 2025, Environment and Climate Change Canada (ECCC) and Health Canada jointly released a comprehensive State of Per- and Polyfluoroalkyl Substances (PFAS) Report, concluding definitively that non-polymeric PFAS as a broad class meet the criteria for toxicity under the Canadian Environmental Protection Act (CEPA). This determination triggered the inclusion of all non-polymeric PFAS on Schedule 1—Canada’s List of Toxic Substances—making Canada one of the first jurisdictions in the world to regulate PFAS at the class level rather than compound by compound.
The 30 ng/L Drinking Water Objective
Health Canada has established a drinking water objective of 30 nanograms per litre (ng/L) for the sum total of 25 specific PFAS. This replaces the previous approach of setting individual provisional guidelines for PFOS, PFOA, and a small group of related compounds. The 30 ng/L combined objective serves as interim guidance while Health Canada develops comprehensive, health-based guidelines expected to take several additional years to finalize. Notably, the objective is not yet legally binding at the federal level—Canada’s drinking water quality is regulated primarily at the provincial and territorial level, though federal objectives strongly influence provincial standards.
What the CEPA Toxicity Determination Enables
Listing non-polymeric PFAS on CEPA Schedule 1 is a significant legal step that enables the federal government to develop risk management instruments—regulations, guidelines, or pollution prevention plans—to control PFAS at their sources. The 2025 State of PFAS Report specifically recommends the development of enforceable PFAS effluent standards for wastewater treatment facilities, mandatory PFAS monitoring requirements for industrial dischargers, and national standards for PFAS concentrations in biosolids applied to agricultural land. These recommendations set the agenda for Canadian PFAS regulation over the next three to five years.
Sector-Specific Applications
The 2025 CEPA action reinforces existing controls under Canada’s Prohibition of Certain Toxic Substances Regulations, which already restrict the manufacture, use, sale, and import of PFOS, PFOA, and long-chain perfluorocarboxylic acids (LC-PFCAs). The new class-based toxicity determination extends risk management authority to thousands of additional PFAS compounds not previously covered, including short-chain PFAS used in industrial applications such as fluoropolymer processing and aqueous film-forming foams.
Comparison with International Standards
Canada’s 30 ng/L combined objective sits between the stringency of the U.S. EPA’s 4 ppt individual MCLs for PFOA and PFOS and the EU’s drinking water limit of 100 ng/L for the sum of 20 PFAS. Australia updated its drinking water guidelines in June 2025 to 8 ng/L for PFOS and 200 ng/L for PFOA separately. Japan enforces a 50 ng/L combined limit for PFOS and PFOA. Canada’s approach of setting a combined limit across 25 compounds reflects a precautionary stance that acknowledges the mixture toxicity of PFAS beyond the two legacy compounds.
Implications for Water Treatment and Filter Manufacturers
For water treatment suppliers and OEM filter manufacturers operating in Canada, the CEPA classification and 30 ng/L objective create several near-term requirements. Municipal water utilities in provinces that adopt the federal objective—including Ontario, British Columbia, and Quebec, which have already signaled intent to align—will need to verify PFAS removal performance across a broader compound list than previously required. Point-of-use and point-of-entry filter systems that carry NSF/ANSI performance certifications for PFAS removal will face increased demand from residential customers in areas with documented groundwater PFAS contamination, particularly near airports, military installations, and industrial sites.
Wastewater treatment plant operators should anticipate forthcoming federal effluent standards for PFAS and begin assessing current PFAS loading in their influent and effluent. Advanced treatment technologies including granular activated carbon (GAC), ion exchange (IX) resin, and nanofiltration membranes are expected to be specified in any future Canadian effluent limit framework, given their demonstrated ability to achieve sub-10 ng/L PFAS concentrations at pilot and full scale.