EPA

CWA section 401 governs certification of water quality and provides significant latitude to states to decide how to issue certifications. The Biden EPA updated Section 401 implementing regulations, and litigation is ongoing.

Under the SDWA, the Biden EPA set strict standards and requirements for certain PFAS chemicals in public drinking water supplies. The Trump EPA is delaying compliance deadlines for two of those Biden-era SDWA rules and working to rescind four others.