Should Ontario rural buyers be concerned about PFAS or forever chemicals in well water?

PFAS, often called "forever chemicals" because they break down extremely slowly in the environment, are an emerging area of concern for groundwater generally, including private wells, particularly near sites with a history of firefighting foam use, certain industrial activity, or some types of waste disposal. Unlike bacterial contamination, PFAS aren't part of a standard basic potability test, so a buyer relying only on the bacteriological testing many lenders require would not learn anything about PFAS levels from that test alone.

Whether specific PFAS testing is warranted for a given rural property depends largely on its proximity to any of the known higher-risk sources, such as a former or current fire training area, certain airports, or specific industrial operations, rather than being something every rural buyer needs to test for as a matter of course. Buyers concerned about this, particularly near a plausible source, should ask their environmental consultant or a qualified lab specifically about PFAS testing options, since detection requires specialized analysis beyond routine well testing. As with other emerging contaminants, treating a known or suspected nearby source as a trigger for targeted testing is more practical than blanket testing every rural well.