A bill to direct the Administrator of the Environmental Protection Agency to conduct a national assessment of the extent to which radon gas formed from naturally occurring deposits of uranium is a threat to public health, to authorize a demonstration program to test methods of eliminating the threat to public health from radon gas, and to authorize disaster relief assistance for releases of radon gas.

Directs the Administrator of the Environmental Protection Agency to report to the Congress within one year an evaluation on the threat to human health of radon gas and radon daughters forming from naturally occurring deposits of uranium and collecting in residences.

Directs the Administrator to conduct a demonstration program testing methods of reducing or eliminating the threat, reporting periodically to the Congress on the results. Authorizes appropriations.

Amends the Disaster Relief Act of 1974 to include assistance for releases of radon gas.