Anyone hoping to check their home’s radon level can now pick from dozens of different radon monitors sold online or in stores — but experts warn many of those devices don’t actually work.

Plenty of Canadians install faulty monitors, only to find out later that they aren’t approved or certified, cautioned Pam Warkentin, the executive director of the Canadian Association of Radon Scientists and Technologists (CARST), which runs the country's certification program alongside Health Canada.

“I have to tell them that they can’t really base any decisions on those detectors and need to go purchase another one."

As of March 2026, only six electronic monitors have been approved for use:

• Airthings Corentium Home.
• Airthings View.
• Aranet RN+.
• Ecosense EcoQube.
• Ecosense RadonEye.
• SunRadon Luft.

Canadians looking for one of those certified devices can find a list of provincial suppliers through the Take Action on Radon program.