Notes: National Building Code 2010 changes to address radon - <<https://www.nrc-cnrc.gc.ca/eng/solutions/advisory/codes_centre/presentations/2010/radon.html>> National radon standards were developed for radon mitigation in new construction and existing housing - <<http://publications.gc.ca/collections/collection_2017/ongc-cgsb/P29-149-012-2017-eng.pdf>> Health Canada was involved in setting national measures but jurisdictional authority is at the Provincial/Territorial and municipal level.  