A wide selection of radon monitors is available for those interested in checking their home’s radon levels. However, experts caution that many of these devices are ineffective. Pam Warkentin, the executive director of the Canadian Association of Radon Scientists and Technologists (CARST), highlighted that numerous Canadians unknowingly purchase unapproved or uncertified monitors, leading to wasted time and money. For instance, a homeowner discovered that the devices he and his adult children used had been recalled after several months of use.
These unreliable monitors pose a significant public health risk as they provide inaccurate readings, potentially discouraging homeowners from mitigating radon exposure, a hazardous, invisible gas linked to lung cancer. Research indicates that millions of Canadian homes likely have elevated radon levels, resulting in an estimated 3,200 radon-induced lung cancer deaths annually.
To accurately test for radon, Health Canada recommends conducting tests for at least three months, preferably during the winter when homes are sealed. Homeowners can opt for professional radon measurement services or purchase their own test kits. While some communities offer free monitors, most homeowners acquire devices at their expense, ranging from passive trackers to real-time electronic monitors. However, some monitors may offer misleading readings, providing inaccurate information about actual radon levels.
Approved radon monitors undergo testing at Health Canada’s radon lab in Ottawa to ensure their reliability. Only six electronic monitors, including Airthings Corentium Home and Ecosense RadonEye, have been certified for use in Canada as of March 2026. Homeowners seeking certified devices can access a list of provincial suppliers through the Take Action on Radon program.
Before purchasing a radon monitor, it is crucial to check for recalls as some devices may not be approved or have been recalled. Warkentin advised homeowners to consult the list of devices not yet approved or recalled by Health Canada to ensure they are purchasing a reliable monitor. Manufacturers frequently release new devices or rebrand faulty ones, making it challenging for consumers to stay informed about the constantly evolving market.