Monitoring and detection
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(a) Monitoring program for unregulated contaminants
(1) In general
The Administrator shall include each substance described in paragraph (2) in the fifth publication of the list of unregulated contaminants to be monitored under section 300j–4(a)(2)(B)(i) of title 42.
(2) Substances describedThe substances referred to in paragraph (1) are perfluoroalkyl and polyfluoroalkyl substances and classes of perfluoroalkyl and polyfluoroalkyl substances—
(A)
for which a method to measure the level in drinking water has been validated by the Administrator; and
(B)
that are not subject to a national primary drinking water regulation.