Regulations last checked for updates: May 18, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
Appendix - Table A to Subpart D of Part 192
pCi/liter
Combined radium-226 and radium-2285
Gross alpha-particle activity (excluding radon and uranium)15
authority: Sec. 275 of the Atomic Energy Act of 1954, 42 U.S.C. 2022,as,Pub. L. 95-604, as amended
source: 48 FR 602, Jan. 5, 1983, unless otherwise noted.