The president issued a memorandum to the heads of executive departments and agencies regarding the restoration of healthy and abundant salmon, steelhead, and other native fish populations in the Columbia River Basin.

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 announced that it is establishing the Historically Black Colleges and Universities and Minority Serving Institutions Advisory Council.

The Federal Permitting Improvement Steering Council proposed to amend its regulations to revise the scope of "mining" as a sector with infrastructure projects eligible for coverage under Title 41 of the Fixing America's Surface Transportation Act.

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.

United States v. Transocean Offshore Deepwater Drilling Inc., No. 4:23-cv-03317 (S.D. Tex. Sept. 6, 2023). Under a proposed consent decree, a settling CWA defendant that discharged pollutants without obtaining coverage under an NPDES general permit and exceeded effluent limitations prescribed by the general permit must develop and implement a compliance system to ensure future compliance with the CWA and the general permit, and pay a $507,000 civil penalty.

EPA and the Department of the Army amended the provisions of the agencies’ definition of “waters of the United States” that are invalid under the Supreme Court’s interpretation of the CWA in Sackett v. EPA.