According to a state study, ten percent (10%) of the basements in homes in Niagara County have reported radon levels above the radioactive measurement of four Picocuries per liter (pCi/L), which is the short-term safety standard.  Fifteen percent (15%) of homes tested in the City of Lockport are estimated to have exceeded that standard.  Radon is the leading cause of lung cancer deaths among nonsmokers in America and claims the lives of about 21,000 Americans each year.