42 U.S. Code § 300g - Coverage
CoverageSubject to sections 300g–4 and 300g–5 of this title, national primary drinking water regulations under this part shall apply to each public water system in each State; except that such regulations shall not apply to a public water system—
which consists only of distribution and storage facilities (and does not have any collection and treatment facilities);
which obtains all of its water from, but is not owned or operated by, a public water system to which such regulations apply;
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