Comment Letter: U.S. Environmental Protection Agency: Clean Water Act Section 401 Implementation Challenges—Docket ID No. EPA–HQ–OW–2025–0272 Aug 6, 2025 Comment Letters To: Lauren Kasparek, U.S. Environmental Protection Agency, Office of Water, Oceans, Wetlands and Communities Division Subject: U.S. Environmental Protection Agency: Clean Water Act Section 401 Implementation Challenges—Docket ID No. EPA–HQ–OW–2025–0272 Letter Excerpt: The Association of California Water Agencies (ACWA) respectfully submits comments regarding the U.S. Environmental Protection Agency’s (EPA) request regarding the Clean Water Act (CWA) Section 401 certification process. ACWA supports EPA actions to address implementation challenges and promote regulatory certainty to meet the nation’s water quality needs. Download Comment Letter