Particulate matter

Air Plan Approval; North Carolina; Mecklenburg Monitoring, Recordkeeping, and Reporting Rule Revisions

The Environmental Protection Agency (EPA) is finalizing a State Implementation Plan (SIP) revision to the Mecklenburg County portion of the North Carolina SIP, hereinafter referred to as the Mecklenburg Local Implementation Plan (LIP). The revision was submitted by the State of North Carolina, through the North Carolina Division of Air Quality (NCDAQ), on behalf of Mecklenburg County Air Quality (MCAQ) via a letter dated April 24, 2020, and was received by EPA on June 19, 2020.

Publication Date: 
Tuesday, January 25, 2022 - 4:00am

Air Plan Approval; Washington; Update to the Yakima Regional Clean Air Agency Wood Heater and Burn Ban Regulations

The Environmental Protection Agency (EPA) is approving revisions to the Yakima Regional Clean Air Agency (YRCAA) regulations designed to control particulate matter from residential wood heaters, such as woodstoves and fireplaces. The updated YRCAA regulations set fine particulate matter trigger levels for impaired air quality burn bans, consistent with statutory changes enacted by the Washington State Legislature.

Publication Date: 
Monday, January 24, 2022 - 4:00am

Disapproval of Air Quality Implementation Plans; Wyoming; Proposed Revisions to Regional Haze State Implementation Plan

The Environmental Protection Agency (EPA) is proposing to disapprove a State Implementation Plan (SIP) revision submitted by the State of Wyoming on May 14, 2020, and supplemented in September and October 2020, addressing regional haze (``Wyoming's 2020 SIP revision'').

Publication Date: 
Tuesday, January 18, 2022 - 4:00am

Air Plan Approval; North Carolina; Minor Revisions to Cotton Ginning Operations Rule

The Environmental Protection Agency (EPA) is approving a revision to the North Carolina State Implementation Plan (SIP) submitted by the State of North Carolina Department of Environmental Quality, Division of Air Quality, via a letter dated April 13, 2021, and received by EPA on April 14, 2021. This revision contains minor clarifying and typographical edits to North Carolina's cotton ginning operations rule. EPA is finalizing approval of these changes pursuant to the Clean Air Act (CAA or Act).

Publication Date: 
Tuesday, January 11, 2022 - 4:00am

Air Plan Approval; California; San Joaquin Valley Unified Air Pollution Control District

The Environmental Protection Agency (EPA) is taking final action to partially approve a revision to the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) portion of the California State Implementation Plan (SIP). This revision concerns emissions of oxides of nitrogen (NO<INF>X</INF>) and fine particulate matter (PM<INF>2.5</INF>) from off-road diesel agricultural vehicles and equipment.

Publication Date: 
Monday, December 27, 2021 - 4:00am

Air Plan Approval; Connecticut; 2015 Ozone NAAQS Interstate Transport Requirements

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Connecticut 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.

Publication Date: 
Monday, December 20, 2021 - 4:00am

Air Plan Approval; Rhode Island; 2015 Ozone NAAQS Interstate Transport Requirements

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.

Publication Date: 
Friday, December 10, 2021 - 4:00am

Air Plan Approval; North Carolina; Mecklenburg Air Quality Permit Rules Revisions

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision to the Mecklenburg County portion of the North Carolina SIP, hereinafter referred to as the Mecklenburg Local Implementation Plan (LIP). The revision was submitted by the State of North Carolina, through the North Carolina Division of Air Quality (NCDAQ), on behalf of Mecklenburg County Air Quality (MCAQ) via a letter dated April 24, 2020, and was received by EPA on June 19, 2020.

Publication Date: 
Thursday, December 2, 2021 - 4:00am

Partial Approval and Partial Disapproval of Air Quality Implementation Plans; California; San Joaquin Valley Serious Area and Section 189(d) Plan for Attainment of the 1997 Annual PM2.5

The Environmental Protection Agency (EPA) is taking final action to approve in part and disapprove in part portions of state implementation plan (SIP) revisions submitted by California to address Clean Air Act (CAA or ``Act'') requirements for the 1997 annual fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS or ``standards'') in the San Joaquin Valley PM<INF>2.5</INF> nonattainment area. Specifically, the EPA is approving the 2013 base year emissions inventories in the submitted SIP revision.

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

Clean Air Plans; California; San Joaquin Valley Moderate Area Plan and Reclassification as Serious Nonattainment for the 2012 PM2.5

The Environmental Protection Agency (EPA) is taking final action on all or portions of four state implementation plan (SIP) revisions submitted by California (``State'') to address Clean Air Act (CAA or ``Act'') requirements for the 2012 fine particulate matter (``PM<INF>2.5</INF>'') national ambient air quality standards (NAAQS or ``standards'') and for the 2006 PM<INF>2.5</INF> NAAQS in the San Joaquin Valley (SJV) PM<INF>2.5</INF> nonattainment area.

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

Pages