January is “National Radon Action Month.” Iowa Radon Coalition spokesman Jim Doolittle says it’s a time to think about having your home tested for radon. Doolittle says Iowans should be particularily interested in getting a test for the odorless, invisible gas. Iowa has the highest percentage of homes over the EPA reccomended action level for radon gas.Doolittle says it’s believed glaciers dropped material in Iowa that causes the radon gas. He says the threat of radon gas is present across the state.Gettting rid of radon can be expensive. He says a radon test is cheap, but fixing the house is expensive because you have to use a certified contractor.Doolittle says radon can cause cancer if its not taken care of.Doolittle says you should be able to purchase a radon detection kit from your local health department.