EPA proposed a regulation revising technology-based effluent limitations guidelines (ELGs) and standards for the steam electric power generating point source category applicable to flue gas desulfurization wastewater, bottom ash transport water, and combustion residual leachate at existing sources, and solicited comment on ELGs for legacy wastewater.

United States v. ABF Freight System, Inc., No. 2:23-cv-02039-PKH (W.D. Ark. Mar. 20, 2023). A settling CWA defendant must pay a civil penalty of $535,000 and implement compliance measures at all freight terminals currently operated nationwide (except in the state of Washington) in connection with alleged violations at nine freight terminals.

The Bureau of Safety and Environmental Enforcement adjusted the level of the maximum daily statutory civil monetary penalty amounts for violations of the Outer Continental Shelf Lands Act.

The Bureau of Ocean Energy Management announced the availability of the proposed notice of sale for the proposed Gulf of Mexico Outer Continental Shelf Oil and Gas Lease Sale 261 as required by the Inflation Reduction Act of 2022.

United States v. Gloucester, Massachusetts, City of, No. 1:23-cv-10505-LTS (D. Mass. Mar. 6, 2023). A settling CWA defendant must construct secondary sewage treatment upgrades by March 31, 2028, and comply with all effluent limits in the final permit by June 30, 2028, in connection with defendant's failure to meet certain effluent limits, based on secondary treatment standards, of the city’s water pollution control facility in violation of the final NPDES permit.

NOAA announced the availability of final evaluation findings for seven national estuarine research reserves—Ashepoo-Combahee-Edisto Basin, Chesapeake Bay Virginia, Guana Tolomato Matanzas, San Francisco Bay, South Slough, Tijuana River, and Weeks Bay—under §315 of the CZMA.

The Natural Resources Conservation Service requested public input for the Service to use in refining the Mississippi River Basin Healthy Watershed Initiative (MRBI) and the National Water Quality Initiative (NWQI) to better protect and improve water quality, streamline and improve MRBI and NWQI to increase efficiencies and expand access for underserved communities and producers, and engage with partners to provide technical assistance for MRBI and NWQI implementation.

EPA Region 6 signed and issued the final NPDES general permit for discharges from hydrostatic testing of new and existing vessels in New Mexico, Oklahoma, and Indian country within the states of Texas, Oklahoma, New Mexico, and Louisiana.

EPA approved revisions to Nevada's state primacy program under the SDWA that adopted regulations that effectuate the federal Radionuclides Rule.