The Environmental Protection Agency (EPA) is finalizing a limited approval and limited disapproval of California Code of Regulations, Title 17, Division 3, Chapter 1, Subchapter 10 Climate Change, Article 4, Subarticle 13: Greenhouse Gas Emission Standards for Crude Oil and Natural Gas Facilities (Oil and Gas Methane Rule) into the California State Implementation Plan (SIP). These revisions concern emissions of volatile organic compounds (VOCs) from crude oil and natural gas facilities.

The Environmental Protection Agency (EPA) is finalizing the approval of a revision to the Kentucky State Implementation Plan (SIP), submitted by the Commonwealth of Kentucky, through the Kentucky Division for Air Quality (KDAQ), on March 29, 2021. The revision was submitted by KDAQ on behalf of the Louisville Metro Air Pollution Control District (District or Jefferson County), which has jurisdiction over Jefferson County, Kentucky.

The Environmental Protection Agency (EPA) is taking final action to find that the State of California has failed to submit State Implementation Plan (SIP) revisions to satisfy the contingency measures requirements of the Clean Air Act (CAA) for the 2008 8-hour ozone National Ambient Air Quality Standards (NAAQS or ``standards'') for both the Riverside County (Coachella Valley), California (``Coachella Valley'') and Los Angeles-San Bernardino Counties (West Mojave Desert), California (``West Mojave Desert'') nonattainment areas.

The Environmental Protection Agency (EPA) is taking final action to disapprove revisions to the Antelope Valley Air Quality Management District (AVAQMD) and the Mojave Desert Air Quality Management District (MDAQMD) portions of the California State Implementation Plan (SIP) concerning rules submitted to address section 185 of the Clean Air Act (CAA or the Act) with respect to the 1-hour ozone standard.