Notes: A mapping methodology has been developed by the Government of Canada.  Some provinces have developed radon maps.  Health Canada has not developed a national map.  Other stakeholders have developed a national radon potential map - <<https://canadaradon.com/UploadedFiles/files/RadonPotentialCanadaOverlay.pdf>> The development of a map is in progress and will be used to help target efforts to areas most at risk.  