When Should Action Be Taken To Reduce Radon Levels?
The National Health and Medical Research Council (NHMRC) has reviewed the evidence available and the results of the ARPANSA survey, and has recommended that if the annual average radon concentration in a home exceeds 200 Bq m-3, the householder should contact the appropriate state or territory radiation health authority for advice. The ARPANSA survey found very few homes in this category (about one in two thousand), so the vast majority of homes are unlikely to require any remedial action. For those few homes that exceed this Action Level, there are some simple measures that can be taken to bring radon levels down.
