The Environmental Protection Agency (EPA) is approving State Implementation Plan (SIP) revisions submitted by the State of New Hampshire. The revisions establish NO<INF>X</INF> reasonably available control technology (RACT) requirements for coal-fired cyclone boilers located in the state, portions of New Hampshire's NO<INF>X</INF> RACT certifications for the 2008 and 2015 ozone standards that pertain to requirements for coal-fired cyclone boilers, and withdrawal from the SIP of two previously issued RACT orders.

The Environmental Protection Agency (EPA) is approving a revision to the Indiana State Implementation Plan (SIP), authorizing temporary alternative opacity limitations at the BP Products North America, Inc. (BP) facility in Whiting, Indiana during startup and shutdown. This approval is consistent with the Clean Air Act (CAA) and EPA regulations regarding emissions during these periods in the refinery sector. EPA proposed to approve this SIP submission on August 17, 2022, and received no comments.

The Commonwealth of Kentucky, through the Kentucky Energy and Environment Cabinet (Cabinet), Kentucky Division for Air Quality (KDAQ), submitted a revision to the Kentucky State Implementation Plan (SIP) on November 29, 2022. The SIP revision updates the geographical boundary description and attainment status designation for the Henderson-Webster nonattainment area for the 2010 Sulfur Dioxide (SO<INF>2</INF>) primary National Ambient Air Quality Standards (NAAQS).

The U.S. Environmental Protection Agency (EPA or the Agency) is finalizing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Integrated Iron and Steel Manufacturing Facilities to regulate hazardous air pollutant (HAP) emissions.