Radon Maps

Every Health Canada radon measurement we can place, mapped by postal district, with the number of tested homes printed beside every figure. 37 places so far. Of those with a hundred or more tested homes, Halifax is highest at 35.2% above the action level and Toronto and the GTA lowest at 2.2%.

Provinces

Alberta1,231 tested homes, 7.9% at or above the action level.Saskatchewan1,365 tested homes, 20.0% at or above the action level.Manitoba1,186 tested homes, 27.0% at or above the action level.British Columbia1,460 tested homes, 11.0% at or above the action level.Quebec1,685 tested homes, 13.6% at or above the action level.New Brunswick907 tested homes, 24.8% at or above the action level.Nova Scotia515 tested homes, 15.7% at or above the action level.Newfoundland and Labrador567 tested homes, 8.5% at or above the action level.Prince Edward Island70 tested homes, 5.7% at or above the action level.Yukon216 tested homes, 20.4% at or above the action level.Northwest Territories145 tested homes, 6.9% at or above the action level.Nunavut11 tested homes, 0.0% at or above the action level.Ontario4,530 tested homes, 10.4% at or above the action level.

Alberta Cities in Detail

Calgary104 tested homes across 36 postal districts, nine of which have never been tested at all. Edmonton139 tested homes in and around the city, Sherwood Park and St Albert included.

Ontario Cities in Detail

Toronto and the GTA416 tested homes, 2.2%.Ottawa135 tested homes, 8.1%.Hamilton207 tested homes, 6.3%.London254 tested homes, 6.3%.Kitchener and Waterloo163 tested homes, 2.5%.Windsor264 tested homes, 19.3%.Kingston206 tested homes, 18.9%.Greater Sudbury124 tested homes, 14.5%.Thunder Bay147 tested homes, 23.8%.Guelph145 tested homes, 17.2%.Vancouver and the Lower Mainland147 tested homes, 8.2%.Victoria254 tested homes, 3.9%.Kelowna and the Okanagan344 tested homes, 13.7%.Montreal115 tested homes, 15.7%.Quebec City82 tested homes, 15.9%.Sherbrooke120 tested homes, 20.8%.Gatineau73 tested homes, 15.1%.Halifax105 tested homes, 35.2%.St John's156 tested homes, 6.4%.Moncton262 tested homes, 21.0%.Saint John149 tested homes, 15.4%.Fredericton111 tested homes, 23.4%.

Why the Sample Sizes Are on Every Map

A postal district with two tested homes and a postal district with two hundred look identical on most maps. They are not the same thing, so the count sits next to every number here and a thin one is marked as thin.

An empty district has not been tested. That is not the same as safe. A test in your own home is the only measurement that describes your house.

More to Come

Every province and territory is mapped. More cities are next, using the same two federal surveys and the same method. Tell us which one you want first.