Nitrogen oxides

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

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

The Environmental Protection Agency (EPA) is proposing updates to 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. The parallel direct final rule is published in the ``Rules and Regulations'' section of this issue of the Federal Register because the Agency views this as a noncontroversial action.

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