News 59% of tested Castlegar homes have excessive radon levels SHARE ON: Glenn Hicks, staff Monday, Jan. 26th, 2015 Over half of homes tested for radon gas in Castlegar have levels above the national threshold. This from the BC Lung Association as it releases the results of the largest community-wide testing ever undertaken in Canada. 59% of the homes that returned test kits in Castlegar exceeded Health Canada’s radon exposure guideline.The figure was about 30% in a Prince George study. The association’s Britt Swoveland says this points to the need for all British Columbians to test their homes. //1035.juicefm.ca/news/wp-content/uploads/2015/01/britt-all-bc-shud-test.mp3 Over time a build-up of natural occurring radon gas trapped inside a home can cause lung cancer.