Nitrogen oxides

Implementation of the Revoked 1997 8-Hour Ozone National Ambient Air Quality Standards; Areas That Attained by the Attainment Date

The Environmental Protection Agency (EPA) is codifying its findings that nine areas in four states attained the revoked 1997 8- hour ozone National Ambient Air Quality Standards (herein referred to as the revoked 1997 ozone NAAQS) by the applicable attainment dates.

Publication Date: 
Thursday, July 29, 2021 - 4:00am

Air Plan Approval; Maine; Chapter 100 Definitions and Chapter 113 Growth Offset Regulations

The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Maine. This revision amends the definition of ``Ozone Transport Region'' in the State's Chapter 100 Definitions Regulation and revises language in the State's Chapter 113 Growth Offset Regulation regarding applicability of Nonattainment New Source Review in areas that, at a future date, may not be within the Ozone Transport Region. This action is being taken under the Clean Air Act (CAA).

Publication Date: 
Thursday, July 29, 2021 - 4:00am

Air Plan Approval; Tennessee; Knoxville Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS

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, via a letter dated January 23, 2020. The SIP revision includes the 1997 8-hour ozone national ambient air quality standards (NAAQS) Limited Maintenance Plan (LMP) for the Knoxville, Tennessee Area (hereinafter referred to as the ``Knoxville Area'' or ``Area'').

Publication Date: 
Friday, July 23, 2021 - 4:00am

Approval of Air Quality Implementation Plans; New York; Infrastructure Requirements for the 2015 Ozone, National Air Quality Standards

The Environmental Protection Agency (EPA) is proposing to approve elements of New York's State Implementation Plan (SIP) revisions, submitted to demonstrate that the State meets the requirements of section 110(a)(1) and (2) of the Clean Air Act (CAA) for the 2015 Ozone National Ambient Air Quality Standards (NAAQS). Section 110(a) of the CAA requires that each state adopt and submit for approval into the SIP a plan for the implementation, maintenance and enforcement of each NAAQS promulgated by the EPA.

Publication Date: 
Thursday, July 1, 2021 - 4:00am

Approval of Air Quality Implementation Plans; New York; Part 212, Process Operations

The Environmental Protection Agency (EPA) is proposing to approve a revision to the New York State Implementation Plan concerning process operations. The intended effect of this revision is to streamline and update provisions, align those provisions with permitting regulations, and provide regulatory certainly for the regulated community. New York's comprehensive submittal also included Operating Permit Program requirements; however, the EPA will be acting on these revisions under a separate action.

Publication Date: 
Thursday, July 1, 2021 - 4:00am

Air Plan Approval; TN; Knoxville Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS

The Environmental Protection Agency (EPA) is proposing 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, via a letter dated January 23, 2020. The SIP revision includes the 1997 8-hour ozone national ambient air quality standards (NAAQS) Limited Maintenance Plan (LMP) for the Knoxville, Tennessee Area (hereinafter referred to as the ``Knoxville Area'' or ``Area'').

Publication Date: 
Friday, June 11, 2021 - 4:00am

Clean Air Act New Source Review Operating Permit Program; Notice of Transfer of Permits to Wyoming Department of Environmental Quality

The EPA is proposing to grant Wyoming Department of Environmental Quality's (WDEQ) August 21, 2020 request to transfer to the State administrative authority over two federal permits that were issued by the EPA on June 26, 1973 under the federal new source review (NSR) permitting program. In addition, the EPA is proposing to agree with WDEQ's analysis in its August 21, 2020 letter demonstrating that the current Wyoming regulations still meet the requirements of the federal NSR permitting program. This action is proposing to transfer the 1973 federally issued permits to Wyoming.

Publication Date: 
Friday, May 28, 2021 - 4:00am

Revised Cross-State Air Pollution Rule Update for the 2008 Ozone NAAQS

The U.S. Environmental Protection Agency (EPA) is taking this action to address interstate transport of ozone pollution under the ``good neighbor provision'' of the Clean Air Act (CAA). This final action is taken in response to the United States Court of Appeals for the District of Columbia Circuit's (D.C. Circuit) remand of the Cross- State Air Pollution Rule (CSAPR) Update in Wisconsin v. EPA on September 13, 2019.

Publication Date: 
Friday, April 30, 2021 - 4:00am

Implementation of the Revoked 1997 8-Hour Ozone National Ambient Air Quality Standards; Updates to 40 CFR Part 52 for Areas That Attained by the Attainment Date; Withdrawal of Direct Final Rule

Due to the receipt of adverse comment, the Environmental Protection Agency (EPA) is withdrawing the October 9, 2020, direct final rule to update the Code of Federal Regulations (CFR) to codify its findings that nine areas in four states attained the revoked 1997 8-hour ozone National Ambient Air Quality Standards (NAAQS) by the applicable attainment dates. The EPA will address all comments received in a subsequent final rule for which the EPA will not institute a second comment period.

Publication Date: 
Wednesday, December 9, 2020 - 4:00am

Implementation of the Revoked 1997 8-Hour Ozone National Ambient Air Quality Standards; Updates to 40 CFR Part 52 for Areas That Attained by the Attainment Date

The Environmental Protection Agency (EPA) is updating part 52 of title 40, chapter 1 of the Code of Federal Regulations (CFR) to codify its findings that nine areas in four states attained the revoked 1997 8-hour ozone National Ambient Air Quality Standards (herein referred to as the 1997 ozone NAAQS) by the applicable attainment dates. In February 2019, EPA Regional Offices sent letters to the affected states to communicate the EPA's findings.

Publication Date: 
Friday, October 9, 2020 - 4:00am

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