EPA identified certain additional water quality-limited segments for the Arkansas 2020 §303(d) list, and seeks comment on those additions. 

EPA granted a request from the governor of Texas to voluntarily reclassify the San Antonio, Dallas-Fort Worth, and Houston-Galveston-Brazoria ozone nonattainment areas from moderate to serious for the 2015 ozone NAAQS. 

NMFS announced the initiation of a five-year review for the Maui’s dolphin and South Island Hector’s dolphin.

United States v. Santolubes, LLC, No.24-cv-807 (E.D. Mo. June 10, 2024). Under a proposed consent decree, settling CERCLA defendants must pay $300,000 for response costs incurred at the Findett/Hayford Bridge Road Groundwater Superfund site in St. Charles County, Missouri.

SIP Proposal: Nevada (revisions concerning particulate matter emissions from woodburning devices in Washoe County).

EPA proposed to address the unreasonable risk of injury to human health presented by n-methylpyrrolidone (NMP) under its conditions of use as documented in the Agency's risk evaluation and risk determination for NMP pursuant to TSCA.

EPA announced the availability of acute freshwater aquatic life screening values for 6PPD and its transformation product 6PPD-quinone. 

EPA established requirements for commercial refrigerating appliances and commercial ice machines, safe use of flammable refrigerants, and safe design, construction, installation, and operation of refrigeration systems; and listed several substitutes as acceptable for retail food refrigeration, commercial ice machines, industrial process refrigeration, cold storage warehouses, and ice skating rinks, pursuant to the Agency's significant new alternatives policy program.

SIP Proposal: Arizona (partial approval and partial disapproval of revisions concerning implementation, maintenance, and enforcement of the 2012 fine particulate matter NAAQS).

SIP Approval: West Virginia (second 10-year limited maintenance plans for the 2006 24-hour fine particulate matter NAAQS for the Charleston area and the West Virginia portion of the Steubenville-Weirton, Ohio-West Virginia area).