Carbon monoxide

Air Plan Approval; California; San Diego County Air Pollution Control District; Oxides of Nitrogen

The Environmental Protection Agency (EPA) is proposing to approve a revision to the San Diego County Air Pollution Control District (SDCAPCD) portion of the California State Implementation Plan (SIP). This revision concerns emissions of oxides of nitrogen (NO<INF>X</INF>) from boilers, process heaters, and steam generators. We are proposing to approve a local rule to regulate these emission sources under the Clean Air Act (CAA or the ``Act''). We are taking comments on this proposal and plan to follow with a final action.

Publication Date: 
Monday, January 30, 2023 - 4:00am

Reconsideration of the National Ambient Air Quality Standards for Particulate Matter

Based on the Environmental Protection Agency's (EPA's) reconsideration of the air quality criteria and the national ambient air quality standards (NAAQS) for particulate matter (PM), the EPA proposes to revise the primary annual PM<INF>2.5</INF> standard by lowering the level. The Agency proposes to retain the current primary 24-hour PM<INF>2.5</INF> standard and the primary 24-hour PM<INF>10</INF> standard.

Publication Date: 
Friday, January 27, 2023 - 4:00am

Control of Air Pollution From New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards

The Environmental Protection Agency (EPA) is finalizing a program to further reduce air pollution, including ozone and particulate matter (PM), from heavy-duty engines and vehicles across the United States. The final program includes new emission standards that are significantly more stringent and that cover a wider range of heavy-duty engine operating conditions compared to today's standards; further, the final program requires these more stringent emissions standards to be met for a longer period of when these engines operate on the road.

Publication Date: 
Tuesday, January 24, 2023 - 4:00am

Air Plan Approval; IA; Electronic Submittal of Air Quality Information

The Environmental Protection Agency (EPA) is proposing to approve revisions to the Iowa State Implementation Plan (SIP) and the Operating Permit Program for the State of Iowa. The revisions require the electronic submittal of air emissions reporting, construction permit applications, and Title V permit applications, and make administrative updates. These revisions do not impact the stringency of the SIP or have an adverse effect on air quality. The EPA's proposed approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA).

Publication Date: 
Tuesday, January 24, 2023 - 4:00am

Air Plan Partial Approval and Partial Disapproval; AK, Fairbanks North Star Borough; 2006 24-Hour PM2.5

The Environmental Protection Agency (EPA) is proposing to approve in part and disapprove in part the state implementation plan (SIP) revisions, submitted by the State of Alaska (Alaska or the State) to address Clean Air Act (CAA or Act) requirements for the 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS) in the Fairbanks North Star Borough PM<INF>2.5</INF> nonattainment area (Fairbanks PM<INF>2.5</INF> Nonattainment Area). Alaska made these submissions on December 13, 2019, and December 15, 2020.

Publication Date: 
Tuesday, January 10, 2023 - 4:00am

Air Plan Approval; NC; Miscellaneous NSR Revisions and Updates; Updates to References to Appendix W Modeling Guideline

The Environmental Protection Agency (EPA) is finalizing the approval of a State Implementation Plan (SIP) revision, submitted by North Carolina on April 13, 2021. Specifically, EPA is approving updates to the incorporation by reference of Federal new source review (NSR) regulations and federal guidelines on air quality modeling in the North Carolina SIP.

Publication Date: 
Thursday, January 5, 2023 - 4:00am

Air Plan Approval; Arizona; Maricopa County; Power Plants

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the Maricopa County Air Quality Department's (MCAQD or County) portion of the Arizona State Implementation Plan (SIP). The revision addresses Arizona's reasonably available control technology (RACT) SIP obligations for the Phoenix- Mesa ozone nonattainment area that is classified as Moderate nonattainment for the 2008 ozone national ambient air quality standards (NAAQS).

Publication Date: 
Friday, December 30, 2022 - 4:00am

Air Plan Approval; Kentucky; Revision to Federally Enforceable District Origin Operating Permits

The Environmental Protection Agency (EPA) is proposing to approve a revision to the Jefferson County portion of the Kentucky State Implementation Plan (SIP) submitted by the Commonwealth of Kentucky through the Kentucky Energy and Environment Cabinet (Cabinet) on June 15, 2022. The changes were submitted by the Cabinet on behalf of the Louisville Metro Air Pollution Control District (District, also referred to herein as Jefferson County).

Publication Date: 
Tuesday, December 27, 2022 - 4:00am

Air Plan Approval; Colorado; Reg 3 NSR and APEN Updates

The Environmental Protection Agency (EPA) is finalizing approval of regulatory amendments submitted by the State of Colorado on May 13, 2020. The revisions make limited amendments to the State's New Source Review (NSR) and Air Pollution Emission Notices (APEN). The EPA is taking this action pursuant to the Clean Air Act (CAA).

Publication Date: 
Tuesday, November 22, 2022 - 4:00am

Air Plan Approval; Mississippi; Revision of Excess Emissions Provisions

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the Mississippi Department of Environmental Quality (MDEQ) on November 17, 2016, on behalf of the State of Mississippi. The revision was submitted in response to EPA's SIP Call published on June 12, 2015, concerning excess emissions during startup, shutdown, and malfunction (SSM) events. EPA is approving the SIP revision and finds that such SIP revision corrects the deficiencies identified in the June 12, 2015, SIP Call.

Publication Date: 
Friday, November 18, 2022 - 4:00am

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