The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Rhode Island as meeting the Clean Air Act (CAA) requirement that each State's SIP contain adequate provisions to prohibit emissions that will significantly contribute to nonattainment or interfere with maintenance of the 2015 8-hour ozone national ambient air quality standards (NAAQS) in any other state. This action is being taken in accordance with the CAA.

The Environmental Protection Agency (EPA) is making a determination that the St. Clair sulfur dioxide (SO<INF>2</INF>) nonattainment area has attained the 2010 primary SO<INF>2</INF> National Ambient Air Quality Standard (2010 SO<INF>2</INF> NAAQS). This determination suspends certain planning requirements and sanctions for the nonattainment area for as long as the area continues to attain the 2010 SO<INF>2</INF> NAAQS. EPA proposed this action on August 17, 2021, and received four supportive comments and one set of adverse comments.

The Environmental Protection Agency (EPA or Agency) is approving State Implementation Plan (SIP) submissions from Florida, Georgia, North Carolina, and South Carolina, addressing the Clean Air Act (CAA or Act) Good Neighbor interstate transport infrastructure SIP requirements for the 2015 8-hour ozone National Ambient Air Quality Standard (NAAQS or standards). EPA has determined that each state's SIP contains adequate provisions to prohibit emissions that will significantly contribute to nonattainment or interfere with maintenance of the 2015 ozone NAAQS in any other state.

The Environmental Protection Agency (EPA) is taking final action to approve a state implementation plan (SIP) revision submitted by the State of Tennessee, through the Tennessee Department of Environment and Conservation (TDEC), Air Pollution Control Division, on June 23, 2020. The SIP revision includes the 1997 8-hour ozone national ambient air quality standards (NAAQS) Limited Maintenance Plan (LMP) for the Montgomery County, Tennessee portion of the Clarksville- Hopkinsville Area (hereinafter referred to as the ``Montgomery County Area'' or ``Area'').