StacksVerified U.S. regulatory reference

40 CFR §61.22

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Emissions of radon-222 to the ambient air from an underground uranium mine shall not exceed those amounts that would cause any member of the public to receive in any year an effective dose equivalent of 10 mrem/y.