Wilderness areas

Approval and Promulgation of Implementation Plans; Montana; Butte PM10

The Environmental Protection Agency (EPA) is approving the Limited Maintenance Plan (LMP) submitted by the State of Montana to EPA on March 23, 2020, for the Butte Moderate nonattainment area (NAA) for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM<INF>10</INF>) and concurrently redesignate the NAA to attainment for the 24-hour PM<INF>10</INF> National Ambient Air Quality Standard (NAAQS).

Publication Date: 
Friday, June 25, 2021 - 4:00am

Revised Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards

This final action revises or affirms the initial air quality designations for 14 counties associated with seven nonattainment areas for the 2015 primary and secondary National Ambient Air Quality Standards (NAAQS) for ozone. In a July 10, 2020, decision, the District of Columbia Circuit Court remanded to the Environmental Protection Agency (EPA or Agency), but did not vacate, the April 30, 2018, designations for 16 counties associated with nine nonattainment areas located in seven states.

Publication Date: 
Monday, June 14, 2021 - 4:00am

Designation of Areas for Air Quality Planning Purposes; California; Eastern Kern Ozone Nonattainment Area; Reclassification to Severe

Under the Clean Air Act (CAA), the Environmental Protection Agency (EPA) is granting a request by the California Air Resources Board (CARB) to reclassify the Eastern Kern, California (``Eastern Kern'') ozone nonattainment area from ``Serious'' to ``Severe'' for the 2008 ozone national ambient air quality standard (NAAQS).

Publication Date: 
Monday, June 7, 2021 - 4:00am

Designation of Areas for Air Quality Planning Purposes; California; San Diego County Ozone Nonattainment Area; Reclassification to Severe

Under the Clean Air Act (CAA or ``Act''), the Environmental Protection Agency (EPA) is taking final action to approve a request from the State of California to reclassify the San Diego County ozone nonattainment area from ``Serious'' to ``Severe'' for the 2008 ozone National Ambient Air Quality Standards (NAAQS) and from ``Moderate'' to ``Severe'' for the 2015 ozone NAAQS.

Publication Date: 
Wednesday, June 2, 2021 - 4:00am

Air Quality Designation; TN: Redesignation of the Sumner County 2010 Sulfur Dioxide Unclassifiable Area

The Environmental Protection Agency (EPA) is approving a submission by the State of Tennessee, through the Tennessee Department of Environment and Conservation (TDEC), on September 29, 2020, to redesignate the Sumner County, Tennessee, unclassifiable area (hereinafter referred to as the ``Sumner County Area'' or ``Area'') to attainment/unclassifiable for the 2010 1-hour primary sulfur dioxide (SO<INF>2</INF>) national ambient air quality standard (hereinafter referred to as the 2010 SO<INF>2</INF> 1-hour NAAQS).

Publication Date: 
Tuesday, May 25, 2021 - 4:00am

Air Plan Approval; ID: Logan Utah-Idaho PM2.5

The Environmental Protection Agency (EPA) is redesignating the Idaho portion of the Logan, Utah-Idaho fine particulate matter (PM<INF>2.5</INF>) nonattainment area (Logan UT-ID NAA) to attainment for the 2006 PM<INF>2.5</INF> National Ambient Air Quality Standard (NAAQS).

Publication Date: 
Friday, May 21, 2021 - 4:00am

Approval and Promulgation of Implementation Plans; State of Utah; Logan, Utah-Idaho PM2.5

The Environmental Protection Agency (EPA) is approving the request by the State of Utah to redesignate the Logan, Utah-Idaho (UT- ID) nonattainment area (NAA) (Logan NAA) to attainment status for the 2006 24-hour National Ambient Air Quality Standards (NAAQS) for particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 microns (PM<INF>2.5</INF>), and approving related State Implementation Plan (SIP) revisions submitted by the State of Utah on November 5, 2019, and January 13, 2020.

Publication Date: 
Wednesday, May 19, 2021 - 4:00am

Air Quality Designations for the 2010 Sulfur Dioxide (SO2

The Environmental Protection Agency (EPA) is withdrawing the initial nonattainment designation for portions of the Outagamie County, Wisconsin, area for the 2010 sulfur dioxide (SO<INF>2</INF>) primary National Ambient Air Quality Standard (NAAQS) and is finalizing a designation of attainment/unclassifiable for the area. The EPA Administrator signed an action on December 21, 2020, to designate certain areas in the United States (U.S.) for the 2010 SO<INF>2</INF> NAAQS, including the Outagamie County area.

Publication Date: 
Wednesday, April 14, 2021 - 4:00am

Approval and Promulgation of Implementation Plans; State of Utah; Salt Lake City and Provo, Utah PM2.5

On November 6, 2020, the Environmental Protection Agency (EPA) published a notice of proposed rulemaking to approve redesignation of the Salt Lake City, Utah and Provo, Utah nonattainment areas (NAAs) to attainment for the 2006 24-hour fine particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 microns (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS), and also acted on multiple related State Implementation Plan (SIP) submissions.

Publication Date: 
Tuesday, April 6, 2021 - 4:00am

Air Quality Designations for the 2010 Primary Sulfur Dioxide (SO2

This final rule establishes the initial air quality designations for certain areas in the United States (U.S.) for the 2010 primary sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS). The Environmental Protection Agency (EPA) is designating the areas as either nonattainment, attainment/ unclassifiable, or unclassifiable.

Publication Date: 
Friday, March 26, 2021 - 4:00am

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