The map version of this interactive is no longer available. The original information is still available from Health Canada

In 2012 Health Canada released a report showing that 6.9 per cent of Canadians are living in homes with radon levels above the current Canadian guidelines of 200 becquerels per cubic metre (Bq/m3).

CBC News has obtained and plotted the data showing the results of approximately 14,000 radon tests in homes across Canada. Locations on the map are nearest approximations based on partially-redacted postal data.