Questions or Comments: siprules@tceq.texas.gov
You are here:

SIP Hot Topics

Hot topics related to Texas' State Implementation Plan (SIP) for air quality.

Please visit the Texas SIP Revisions webpage for more details on Proposed SIP Revisions and Public Hearing Information and Adopted SIP Revisions.

(Last updated: 9/18/2020)

New Executive Director's Recommended 2021 Regional Haze SIP Revision

On October 7, 2020, the commission will consider proposal of the executive director's recommended 2021 Regional Haze SIP Revision (Project No. 2019-112-SIP-NR). The proposed SIP revision would demonstrate compliance with the regional haze requirements of the Federal Clean Air Act, §169A and the United States Environmental Protection Agency’s (EPA) Regional Haze Rule for the second planning period. The proposed SIP revision addresses regional haze in Big Bend and Guadalupe National Parks in Texas and Class I areas located outside Texas that may be affected by emissions from within the state.

Withdrawal of the El Paso One-Hour Ozone Redesignation Request and Maintenance Plan SIP Revision

On September 25, 2020, the commission will consider the executive director's recommended El Paso One-Hour Ozone Redesignation Request and Maintenance Plan SIP Withdrawal (Non-Rule Project No. 2020-040-SIP-NR). This action would withdraw from the United States Environmental Protection Agency's (EPA) review, the El Paso Redesignation Request and Maintenance Plan SIP Revision for the One-Hour Ozone National Ambient Air Quality Standard (NAAQS), adopted by the commission on April 24, 2019.

Withdrawal of the One-Hour Ozone portion of the Beaumont-Port Arthur (BPA) One-Hour Ozone Redesignation Request and Maintenance Plan and the 1997 Eight-Hour Ozone Second 10-Year Maintenance Plan SIP Revision

On September 25, 2020, the commission will consider the executive director's recommended BPA One-Hour Ozone Redesignation Request and Maintenance Plan SIP Withdrawal (Non-Rule Project No. 2020-39-SIP-NR). This action would withdraw from the EPA's review, a portion of the BPA Redesignation Request and Maintenance Plan for the One-Hour Ozone Standard and Second 10-Year Maintenance Plan for the 1997 Eight-Hour Ozone Standard SIP Revision, adopted by the commission on January 30, 2019. The portion under consideration for withdrawal concerns the state's redesignation request and maintenance plan for the 1979 one-hour ozone NAAQS.

Bexar County 2015 Eight-Hour Ozone Nonattainment Area Federal Clean Air Act (FCAA), §179B Demonstration SIP Revision

On July 1, 2020, the commission adopted the Bexar County 2015 Eight-Hour Ozone Nonattainment Area FCAA, §179B Demonstration SIP Revision (Non-Rule Project No. 2019-106-SIP-NR). The SIP revision demonstrates that the Bexar County marginal ozone nonattainment area would attain the 2015 eight-hour ozone NAAQS by its attainment deadline “but for” anthropogenic emissions emanating from outside the United States. 

2015 Eight-Hour Ozone NAAQS Emissions Inventory (EI) SIP Revision for the Houston-Galveston-Brazoria (HGB), Dallas-Fort Worth (DFW), and Bexar County Nonattainment Areas

On June 10, 2020, the commission adopted the 2015 Eight-Hour Ozone NAAQS EI SIP Revision for the HGB, DFW, and Bexar County Nonattainment Areas (Non-Rule Project No. 2019-111-SIP-NR). The SIP revision satisfies FCAA, §172(c)(3) and §182(a)(1) EI reporting requirements for areas designated nonattainment for the 2015 eight-hour ozone NAAQS. The revision also includes certification statements to confirm that the emissions statement and nonattainment new source review requirements have been met for the HGB, DFW, and Bexar County 2015 eight-hour ozone nonattainment areas.

DFW Serious Classification Attainment Demonstration (AD) SIP Revision for the 2008 Eight-Hour Ozone NAAQS

On March 4, 2020, the commission adopted the DFW Serious Classification AD SIP Revision for the 2008 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2019-078-SIP-NR). The SIP revision includes a photochemical modeling analysis, a weight of evidence analysis, a reasonably available control technology (RACT) analysis, a reasonably available control measures analysis, motor vehicle emissions budgets for 2020, and a contingency plan. This SIP revision also incorporates revisions to the 30 Texas Administrative Code Chapters 115 and 117 rules to address major source RACT requirements for nitrogen oxides and volatile organic compounds associated with reclassification from moderate to serious.

HGB Serious Classification AD SIP Revision for the 2008 Eight-Hour Ozone NAAQS

On March 4, 2020, the commission adopted the HGB Serious Classification AD SIP Revision for the 2008 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2019-077-SIP-NR). The SIP revision includes a photochemical modeling analysis, a weight of evidence analysis, a reasonably available control technology analysis, a reasonably available control measures analysis, motor vehicle emissions budgets for 2020, and a contingency plan.

DFW and HGB Serious Classification Reasonable Further Progress (RFP) SIP Revision for the 2008 Eight-Hour Ozone NAAQS

On March 4, 2020, the commission adopted the DFW and HGB Serious Classification RFP SIP Revision for the 2008 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2019-079-SIP-NR). To meet FCAA requirements, the SIP revision includes an analysis of reasonable further progress toward attainment of the 2008 eight-hour ozone NAAQS, demonstrating 9% emissions reduction in ozone precursors from January 1, 2018 through December 31, 2020, a 3% reduction from January 1, 2021 through December 31, 2021 for attainment year RFP contingency, and RFP motor vehicle emissions budgets for the 2020 attainment year.

El Paso Redesignation Request and Maintenance Plan SIP Revision for the One-Hour Ozone NAAQS

On April 24, 2019, the commission adopted the El Paso Redesignation Request and Maintenance Plan SIP Revision for the One-Hour Ozone NAAQS (Non-Rule Project No. 2018-029-SIP-NR). The SIP revision includes a request that the United States Environmental Protection Agency (EPA) redesignate the El Paso area (El Paso County) to attainment for the one-hour ozone NAAQS and provides a maintenance plan that will ensure the area remains in attainment of the NAAQS through 2032. The SIP revision includes a request that the EPA also consider this plan as a second 10-year maintenance plan for the one-hour ozone NAAQS.

DFW Redesignation Request and Maintenance Plan SIP Revision for the One-Hour and 1997 Eight-Hour Ozone NAAQS

On March 27, 2019, the commission adopted the DFW Redesignation Request and Maintenance Plan SIP Revision for the One-Hour and 1997 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2018-028-SIP-NR). The SIP revision includes a request that the EPA redesignate the DFW area to attainment for the one-hour and 1997 eight-hour ozone NAAQS and provides a maintenance plan that will ensure the area remains in attainment of the NAAQS through 2032.

BPA Redesignation Request and Maintenance Plan for the One-Hour Ozone Nonattainment Area and Second 10-Year Maintenance Plan for the 1997 Eight-Hour Ozone Nonattainment Area SIP Revision

On January 30, 2019, the commission adopted the BPA Redesignation Request and Maintenance Plan for the One-Hour Ozone Nonattainment Area and Second 10-Year Maintenance Plan for the 1997 Eight-Hour Ozone Nonattainment Area SIP revision. The SIP revision includes a request that the EPA redesignate the BPA area (Hardin, Jefferson, and Orange Counties) to attainment for the one-hour ozone NAAQS and provides a maintenance plan that will ensure the area remains in attainment of the NAAQS through 2032. The SIP revision includes a request that the EPA also consider this plan as a second 10-year maintenance plan for the one-hour ozone standard. The SIP revision also includes a second 10-year maintenance plan for the 1997 eight-hour ozone NAAQS.

HGB Redesignation Request and Maintenance Plan SIP Revision for the One-Hour and 1997 Eight-Hour Ozone NAAQS

On December 12, 2018, the commission adopted the HGB Redesignation Request and Maintenance Plan SIP Revision for the One-Hour and 1997 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2018-026-SIP-NR). The SIP revision includes a request that the EPA redesignate the HGB area to attainment for the one-hour and 1997 eight-hour ozone NAAQS and provides a maintenance plan that will ensure the area remains in attainment of the NAAQS through 2032.

SIP Revision to Remove Anti-Tampering and Early Action Compact (EAC) Low Income Repair Assistance Program (LIRAP)

On October 17, 2018, the commission adopted a SIP Revision to Remove Anti-tampering and EAC LIRAP (Non-Rule Project No. 2018-006-SIP-NR). The SIP revision removes Chapter 114, Subchapter B, and Section 114.86 from the SIP. Neither set of rules is a Federal Clean Air Act SIP requirement, and neither was adopted into the SIP with associated emissions reductions. Along with the SIP revision, this action withdraws from consideration four adopted amendments to the anti-tampering rules that are still pending action by the United States Environmental Protection Agency.

Infrastructure and Transport SIP Revisions for the 2015 Ozone Standard

On August 8, 2018, the commission adopted two revisions to the Texas SIP for the 2015 ozone NAAQS: the 2015 Ozone NAAQS Infrastructure SIP Revision (Non-Rule Project No. 2017-040-SIP-NR) and the 2015 Ozone NAAQS Transport SIP Revision (Non-Rule Project No. 2017-039-SIP-NR).

DFW 2008 Eight-Hour Ozone Standard Nonattainment Area Reasonably Available Control Technology (RACT) Update SIP Revision

On August 8, 2018, the commission adopted a revision to the Texas SIP for the DFW nonattainment area for the 2008 eight-hour ozone standard and a voluntary Agreed Order with TXI Operations, LP. The DFW 2008 Eight-Hour Ozone Standard Nonattainment Area RACT Update SIP revision (Non-Rule Project No. 2017-001-SIP-NR) addresses the United States Environmental Protection Agency’s final conditional approval of RACT for nitrogen oxides for the DFW 2008 eight-hour ozone standard nonattainment area through a voluntary Agreed Order No. 2017-1648-SIP (Non-Rule Project No. 2018-010-SIP-NR), with TXI Operations, LP.

Proposed SIP Revision to Remove Anti-Tampering and Early Action Compact (EAC) Low Income Repair Assistance Program (LIRAP)

On April 27, 2018, the commission approved proposal of a SIP Revision to Remove Anti-tampering and EAC LIRAP (Non-Rule Project No. 2018-006-SIP-NR). The proposed SIP revision would remove Chapter 114, Subchapter B, and Section 114.86 from the SIP. Neither set of rules is a Federal Clean Air Act SIP requirement, and neither was adopted into the SIP with associated emissions reductions. Along with the SIP revision, the requested action would withdraw from consideration four adopted amendments to the anti-tampering rules that are still pending action by the United States Environmental Protection Agency.

A public hearing on the proposed SIP revision was held on May 31, 2018 at 2:00 p.m. at the Texas Commission on Environmental Quality Headquarters in Building E, Room 201S, located at 12100 Park 35 Circle, Austin TX. The public comment period opened on May 1, 2018 and closed on June 4, 2018.

DRAFT SIP Timeline - Estimated Dates and Activities 2020

This draft timeline reflects the ongoing SIP revision activities that will continue through 2020. 

Sign up for e-mail updates on SIP revisions and SIP-related news items

You will receive e-mails whenever we add new information to this SIP Hot Topics web page. Click on the link below and do the following:

  1. Enter and confirm your e-mail address
  2. From the list of choices, look under Air Quality and select "SIP Hot Topics"
  3. Select other subscriptions if you wish, then click "Save"
  4. The system will then send you a confirmation e-mail to accept

You can unsubscribe, change your e-mail address, or choose additional options from the link on this page or from the update e-mails you receive.

Are you a new subscriber? Sign up for e-mail updatesExit the TCEQ.

Already a subscriber with us? Access your user profileExit the TCEQ to add this subscription.