Other areas with high levels include central Colorado, northern Kansas, central Ohio and central Pennsylvania. This is concerning as radon is the second-leading cause of lung cancer after smoking ...

Ohio ranks in fourth place when it comes to the American states with the highest levels of radon. Of the over 98,000 buildings in the state that have been tested for the gas, 52% have seen levels ...

Radon levels are particularly high in Colorado due to the state’s geological makeup, with nearly half of all homes exceeding safe levels. Testing your home is easy with a simple do-it-yourself ...