EPA finalized multiple actions under §111 of the CAA addressing greenhouse gas (GHG) emissions from fossil fuel-fired electric generating units (EGUs), including the repeal of the Affordable Clean Energy Rule, emission guidelines for GHG emissions from existing fossil fuel-fired steam generating EGUs, and revisions to the new source performance standards for GHG emissions from new and reconstructed fossil fuel-fired stationary combustion turbine EGUs. 

EPA finalized a CWA regulation to revise the technology-based effluent limitations guidelines and standards for the steam electric power generating point source category applicable to flue gas desulfurization wastewater, bottom ash transport water and legacy wastewater at existing sources, and combustion residual leachate at new and existing sources. 

EPA finalized technology reviews conducted for NESHAPs for gasoline distribution facilities and the review of new source performance standards for bulk gasoline terminals. 

EPA finalized a rule to address the unreasonable risk of injury to health presented by methylene chloride under its conditions of use under TSCA. 

EPA finalized amendments to NESHAPs for the coal- and oil-fired electric utility steam generating units source category.

SIP Approval: Nevada (nonattainment new source review requirements for the 2015 ozone NAAQS for Clark County Department of Environment and Sustainability). 

EPA announced the availability of proposed interim registration review decisions for bromine, and proposed final registration review decisions for agrobacterium radiobacter, polybutene resins, and porcine zona pellucida. 

EPA withdrew from Agency regulation and management two designated ocean dredged material disposal sites, the Nome East and Nome West Sites, located near Nome, Alaska, pursuant to the Marine Protection, Research, and Sanctuaries Act.

EPA finalized amendments to the procedural framework rule for conducting risk evaluations under TSCA to better align with the statutory text and applicable court decisions, to reflect the Agency's experience implementing the risk evaluation program following enactment of the 2016 TSCA amendments, and to allow for consideration of future scientific advances in the risk evaluation process without need to further amend the Agency's procedural rule.

EPA made an interim final determination that the California Air Resources Board has submitted a revised rule and has also submitted revised rules on behalf of the San Joaquin Valley Unified Air Pollution Control District, Ventura County Air Pollution Control District, and South Coast Air Quality Management District that correct deficiencies in its CAA SIP provisions concerning ozone nonattainment requirements for controlling volatile organic compounds at crude oil and natural gas facilities.