§ 141.15 - Maximum contaminant levels for radium-226, radium-228, and gross alpha particle radioactivity in community water systems.

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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.
Effective Date Note:
At 65 FR 76745, Dec. 7, 2000, § 141.15 was removed, effective Dec. 8, 2003.

                    
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