FWS proposed to list the pygmy three-toed sloth as a threatened species under the ESA, with a rule issued under §4(d) of the Act. 

SIP Proposal: New York (regional haze).

United States v. Trident Seafoods Corp., No. 2:19-cv-231 (W.D. Wash. Mar. 24, 2024). A proposed material modification to a consent decree concerning a settling CAA defendant's use of ozone-depleting refrigerants on board fishing vessels and at seafood processing facilities in Alaska and the Pacific Northwest extends certain deadlines for the defendant to retrofit or retire a number of its larger refrigeration appliances and requires the defendant to retrofit or retire the appliances on an additional vessel by January 31, 2032. 

FWS initiated five-year status reviews for 100 species in American Sāmoa, California, Hawaii, Idaho, Oregon, and Washington under the ESA. 

SIP Proposal: Wisconsin (second 10-year 2006 24-hour fine particulate matter limited maintenance plan for the Milwaukee-Racine maintenance area). 

FWS proposed to list the bushy whitlow-wort as an endangered species under the ESA, and to designate approximately 41.96 acres in Jim Hogg County, Texas, as critical habitat for the species. 

FWS proposed to remove the North Park phacelia from the Federal List of Endangered and Threatened Plants due to recovery. 

EPA announced the availability of Volumes 1 and 2 of the Integrated Review Plan for the Primary National Ambient Air Quality Standards for Oxides of Nitrogen. 

SIP Approval: California (second 10-year particulate matter maintenance plan for Sacramento County). 

SIP Approval: California (revisions concerning emissions of nitrogen oxides (NOx) from biomass boilers and reasonably available control technology requirements for major sources of NOx in the portion of the Sacramento Metro nonattainment area in the Yolo-Solano Air Quality Management District).