EPA announced the preliminary designation of stormwater discharges from certain commercial, industrial, and institutional sites in two watersheds in Los Angeles County, California, for regulation under the CWA NPDES permitting program. 

EPA entered into a proposed consent decree under the CWA in Arizona Mining Reform Coalition v. Guzman (D. Ariz.) that would obligate EPA to establish copper and lead TMDLs for Queen Creek, Arizona, by July 31, 2028, unless the Arizona Department of Environmental Quality first establishes and submits them to EPA by January 31, 2027.

NOAA announced that it is beginning the process to identify aquaculture opportunity areas in Alaska state waters to help sustainably advance invertebrate and seaweed aquaculture, in partnership with the state of Alaska. 

United States v. Hamilton County Water and Wastewater Treatment Authority, No. 23-cv-00225 (E.D. Tenn. Sept. 29, 2023). Under a proposed consent decree, a settling CWA defendant that allegedly discharged to waters of the United States without an NPDES permit and violated the operations and maintenance conditions of its NPDES permit must perform injunctive relief and pay a civil penalty of $598,490.

EPA announced its intent to approve revisions to Texas' Public Water System Supervision program.

United States v. Waco Oil & Gas Co., Inc., No. 23-cv-00078 (N.D.W. Va. Sept. 28, 2023). Under a proposed consent decree, a settling CWA defendant that discharged pollutants without a permit into waters of the United States must restore impacted areas, perform mitigation, and pay a civil penalty.

The Bureau of Ocean Energy Management amended its renewable energy regulations to update the definition of “Outer Continental Shelf” and add the definition of “State” in conformity with the Inflation Reduction Act.

United States v. Mount Vernon, No. 18-5845 (S.D.N.Y. Sept. 19, 2023). Under a proposed consent decree, a settling CWA defendant must take steps necessary to bring its municipal separate storm sewer system into compliance and pay a $100,000 civil penalty.

EPA revised and replaced the 2020 regulatory requirements for water quality certification under CWA §401.

EPA Region 1 announced the availability of the draft NPDES non-contact cooling water general permit for discharges to certain waters of the Commonwealth of Massachusetts and the state of New Hampshire.