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§141.15 Maximum contaminant levels for radium-226, radium-228, and gross alpha particle radioactivity in community water systems.
Link to an amendment published at 65 FR 76745, December 7, 2000.
The following are the maximum contaminant levels for radium-226, radium-228, and gross alpha particle radioactivity:
(a) Combined radium-226 and radium-228 -- 5 pCi/1.
(b) Gross alpha particle activity (including radium-226 but excluding radon and uranium) -- 15 pCi/1.
[41 FR 28404, July 9, 1976]
