§ 2661.
The national long-term goal of the United States with respect to radon levels in buildings is that the air within buildings in the United States should be as free of radon as the ambient air outside of buildings.
([Pub. L. 94–469, title III, § 301], as added [Pub. L. 100–551, § 1(a)], Oct. 28, 1988, [102 Stat. 2755].)