The researchers' map reveals the geographical distribution of high radon levels around the country ... Nebraska and South Dakota. Other areas with high levels include central Colorado, northern ...

A new map has revealed that ... During these colder months, radon levels were significantly higher in northwestern Kansas, eastern Nebraska and South Dakota, southern Minnesota and all across ...

The US Environmental Protection Agency (EPA) recommends installing a radon mitigation system when the concentration in living space reaches or exceeds 148 Bq/ m 3. Efforts to map radon levels to ...

Over 83 million people around the U.S. live in residences with radon levels over the EPA's action level, new data reveals.