The Environmental Protection Agency (EPA) is finalizing approval of a State Implementation Plan (SIP) revision submitted by the State of South Carolina, through the South Carolina Department of Health and Environmental Control (SC DHEC or Department), on April 24, 2020. The SIP revision updates the numbering and formatting of South Carolina's regulations applicable to emissions inventories, emissions statements, and credible evidence. EPA is finalizing approval of these changes pursuant to the Clean Air Act (CAA or Act) and implementing Federal regulations.

The Environmental Protection Agency (EPA) is finalizing approval of a State Implementation Plan (SIP) revision submitted by the State of Georgia, through the Georgia Environmental Protection Division (GA EPD) on September 1, 2020. Specifically, EPA is finalizing approval of updates to the incorporation by reference of federal prevention of significant deterioration (PSD) new source review (NSR) regulations in the Georgia SIP.

Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving elements of a State Implementation Plan (SIP) submission from the State of Oklahoma for the 2015 Ozone National Ambient Air Quality Standard (NAAQS) and disapproving elements of two SIP submissions for the 2010 sulfur dioxide (SO<INF>2</INF>) and the 2012 fine particulate matter (PM<INF>2.5</INF>) NAAQS. These infrastructure SIP (i-SIP) submissions address how the existing SIP provides for implementation, maintenance, and enforcement of these NAAQS.

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of New Hampshire. On July 29, 2021, the State submitted its 1997 ozone national ambient air quality standards (NAAQS) Limited Maintenance Plan (LMP) for the Boston-Manchester-Portsmouth (Portsmouth) area. EPA is approving the Portsmouth area LMP because it provides for the maintenance of the 1997 ozone NAAQS through the end of the second 10- year portion of the maintenance period.