40 C.F.R. § 141.520
Current through May 31, 2024
If you are a subpart H system serving fewer than 10,000 persons which does not provide filtration, you must continue to comply with all of the filtration avoidance criteria in § 141.71 , as well as the additional watershed control requirements in § 141.521 .
40 C.F.R. §141.520