40 CFR § 141.520 National Primary Drinking Water Regulations

§ 141.520 Is my system subject to the updated watershed control requirements?

Current through Aug 22, 2025 · Read all of Part 141

⚠ 4 pending changes to Part 141

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.

← § 141.511 What is required of new finished water reservoirs?§ 141.521 What updated watershed control requirements must my unfiltered system implement to continue to avoid filtration? →