The Environmental Protection Agency (EPA) is approving several revisions to the New York State Implementation Plan (SIP) meant to result in emission reductions that will help attain and maintain the national ambient air quality standards (NAAQS) for particulate matter (PM) and ozone. These SIP revisions consist of amendments to several existing regulations outlined within New York's Codes, Rules, and Regulations that implement control measures for sources of PM and oxides of nitrogen (NO<INF>X</INF>).

The Environmental Protection Agency (EPA) is approving most elements of a State Implementation Plan (SIP) revision submitted by the State of Rhode Island. This revision addresses the infrastructure requirements of the Clean Air Act (CAA or Act) for the 2012 annual fine particle (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS). We are not taking action on three elements of this submittal in sections 110(a)(2)(C), (D)(i)(II), and (J) that relate to requirements for the State's Prevention of Significant Deterioration (PSD) program.

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of North Carolina's Department of Environmental Quality (DEQ), Division of Air Quality (DAQ or Division), via a letter dated April 13, 2021. This rulemaking addresses the repeal of a State regulation related to delegation of authority and removal of the regulation from the North Carolina SIP. EPA is finalizing approval of these changes pursuant to the Clean Air Act (CAA or Act).

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the State Implementation Plan (SIP) for the State of Missouri submitted on January 30, 2020. This final action amends the SIP by approving revisions to a state regulation that limits the use of dispersion techniques to meet ambient air quality standards in the vicinity of major sources of air pollution. These revisions to the state rule are a revised restructured version of the same rule. The revisions are administrative in nature and do not impact the stringency of the SIP or air quality.