Numerous radon monitors are available for purchase online and in stores, but many are ineffective, according to experts. Pam Warkentin, the executive director of the Canadian Association of Radon Scientists and Technologists (CARST), cautioned that some Canadians unknowingly buy uncertified monitors, leading to inaccurate readings. This can result in wasted time and money, with electronic monitors costing hundreds of dollars each and requiring testing for at least three months.
Radon, a hazardous, invisible gas linked to lung cancer, poses a significant health risk in millions of Canadian homes. Misleading readings from unreliable monitors can deter homeowners from taking necessary steps to mitigate radon exposure. To ensure accurate testing, Health Canada recommends monitoring radon levels for an extended period, especially during winter when homes are sealed tightly.
Approved radon monitors have undergone testing by Health Canada and CARST. Only six electronic monitors have received certification as of March 2026, including Airthings Corentium Home and SunRadon Luft. Canadians seeking certified devices can refer to the Take Action on Radon program for a list of approved suppliers. It is crucial to be cautious when purchasing radon monitors from non-verified sources, as many devices have been recalled due to inaccuracies in readings.
Staying informed about recalled devices is essential, as the market for radon monitors is rapidly evolving, with manufacturers frequently releasing new products or rebranding faulty ones. Homeowners are advised to consult the list of recalled devices provided by Canada’s radon certification program before making a purchase to ensure the reliability of the monitor.