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    Frequently Asked Questions

    Pfas

    What is PFAS?

    PFAS (per- and polyfluoroalkyl substances) are a large group of human-made chemicals known for their strong carbon-fluorine bonds, which make them highly resistant to degradation in the environment. Used since the 1940s in many industrial and consumer products, PFAS repel water, oil, and heat, but they persist in the environment and can accumulate in living organisms. Common examples include PFOA and PFOS, and exposure to PFAS has been linked to possible health risks. Their persistence and widespread use have led to them being called "forever chemicals".

    Where are PFAS contamination hotspots found in water across Canada?

    PFAS are commonly found in Canadian water near locations such as military bases, airports, landfills, and wastewater treatment plants due to the use of firefighting foams and industrial activities. Surface water sources, especially those close to industrial facilities or urban areas, typically have higher PFAS concentrations, while groundwater sources may also be affected in hot-spot regions. PFAS contamination is most prevalent in provinces with large populations, significant industrial activity, or legacy use of PFAS-based products, and has been detected in lakes, rivers, and tap water samples across Canada.