Dallas-Fort Worth: Latest Ozone Planning Activities

Latest events and activities related to the Dallas-Fort Worth (DFW) area’s compliance with the National Ambient Air Quality Standards (NAAQS) for ground-level ozone.

The SIP files on this page are hosted by the Texas Records and Information Locator (TRAIL) web archive . If you need assistance with a file, please contact siprules@tceq.texas.gov.

Last updated: 04/24/2024

Dallas-Fort Worth (DFW) Severe Classification Attainment Demonstration (AD) State Implementation Plan (SIP) Revision for the 2008 Eight-Hour Ozone National Ambient Air Quality Standard (NAAQS)

On April 24, 2024, the commission adopted the DFW 2008 Eight-Hour Ozone Severe Area AD SIP Revision for the 2008 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2023-107-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 2026, and a contingency plan.

The SIP revision also incorporates revisions to 30 Texas Administrative Code Chapter 115, Control of Air Pollution from Volatile Organic Compounds 30 Texas Administrative Code Chapter 117, Control of Air Pollution from Nitrogen Compounds (Rule Project No. 2023-117-117-AI).

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

On April 24, 2024, the commission adopted the DFW and HGB 2008 Eight-Hour Ozone Severe Area RFP SIP Revision for the 2008 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2023-108-SIP-NR). The SIP revision includes an analysis of RFP toward attainment of the 2008 eight-hour ozone NAAQS, RFP motor vehicle emissions budgets for the 2023 analysis year and 2026 attainment year, vehicle miles traveled growth offset requirement, and an RFP contingency plan.

Proposed DFW Severe Area Attainment Demonstration (AD) State Implementation Plan (SIP) Revision for the 2008 Eight-Hour Ozone NAAQS

On November 29, 2023, the commission approved proposal of the DFW Severe Area AD SIP Revision for the 2008 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2023-107-SIP-NR). The proposed 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 2026, and a contingency plan.

The proposed SIP revision also incorporates the proposed revisions to 30 Texas Administrative Code Chapter 115, Control of Air Pollution from Volatile Organic Compounds (Rule Project No. 2023-116-115-AI) and 30 Texas Administrative Code Chapter 117, Control of Air Pollution from Nitrogen Compounds (Rule Project No. 2023-117-117-AI).

The public comment period opened on December 1, 2023 and closed on January 16, 2024. A public hearing was held for the proposed SIP revision on January 11, 2024 at 7:00 p.m. at the Arlington City Council Chambers, 101 West Abram Street, Arlington, Texas.

Proposed DFW and Houston-Galveston Brazoria (HGB) Severe Areas Reasonable Further Progress (RFP) SIP Revision for the 2008 Eight-Hour Ozone NAAQS

On November 29, 2023, the commission approved proposal of the executive director’s recommended DFW and HGB Severe Areas RFP SIP Revision for the 2008 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2023-108-SIP-NR). The proposed SIP revision includes an analysis of RFP toward attainment of the 2008 eight-hour ozone NAAQS, RFP motor vehicle emissions budgets for the 2023 analysis year and 2026 attainment year, vehicle miles traveled growth offset requirement, and an RFP contingency plan.

The public comment period opened on December 1, 2023 and closed on January 16, 2024. Two public hearings were held for the proposed RFP SIP revision. The first was held on January 4, 2024 at 7:00 p.m. at the Houston-Galveston Area Council, 3555 Timmons Lane #100, Houston, Texas. The second was held January 11, 2024 at 7:00 pm at the Arlington City Council Chambers, 101 West Abram Street, Arlington, Texas.

Proposed DFW Moderate AD SIP Revision for the 2015 Eight-Hour Ozone NAAQS

On May 31, 2023, the commission approved proposal of the DFW Moderate Area AD SIP Revision for the 2015 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2022-021-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 2023, and a contingency plan.

The proposed SIP revision also incorporates the proposed 30 Texas Administrative Code Chapter 114, Control of Air Pollution from Motor Vehicles rulemaking (Project No. 2022-026-114-AI), relating to the state’s low Reid vapor pressure control requirements, into the SIP.

The public comment period opened on June 2, 2023 and closed on July 17, 2023. A public hearing was held for the proposed SIP revision on July 6, 2023 at 7:00 p.m. at the Arlington City Council Chambers, 101 West Abram Street, Arlington, Texas.

Proposed DFW and HGB Moderate Areas RFP SIP Revision for the 2015 Eight-Hour Ozone NAAQS

On May 31, 2023, the commission approved proposal of the DFW and HGB Moderate Areas RFP SIP Revision for the 2015 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2022-023-SIP-NR). The proposed RFP SIP revision would demonstrate that the DFW and HGB nonattainment areas will achieve emissions reductions in ozone precursors, volatile organic compounds (VOC) and/or nitrogen oxides (NO_X), consistent with the moderate ozone nonattainment area requirements of FCAA, §182(b)(1)(A) and the 2015 eight-hour ozone NAAQS SIP requirements. In addition to demonstrating the required emissions reductions, this proposed SIP revision would also provide motor vehicle emissions budgets (MVEB) for the 2023 attainment year.

The public comment period opened on June 2, 2023 and closed on July 17, 2023. Two public hearings were held for the proposed RFP SIP revision. The first was held on July 6, 2023 at 7:00 p.m. at the Arlington City Council Chambers, 101 West Abram Street, Arlington, Texas. The second was held July 11, 2023 at 7:00 pm at the Houston-Galveston Area Council, 3555 Timmons Lane #100, Houston, TX.

DFW Serious Classification 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 (TAC) Chapter 115 and Chapter 117 rules (Rule Project Nos. 2019-075-115-AI and 2019-074-117-AI) to address major source RACT requirements for nitrogen oxides and volatile organic compounds associated with reclassification from moderate to serious.

DFW and HGB Serious Classification 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 RFP SIP revision includes an analysis of reasonable further progress toward attainment of the 2008 eight-hour ozone NAAQS, demonstrating a 9% emissions reduction in ozone precursors from January 1, 2018 through December 31, 2020, a 3% emissions reduction from January 1, 2021 through December 31, 2021 for attainment year RFP contingency, and RFP MVEB for the 2020 attainment year.

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

On September 11, 2019, the commission approved proposal of the DFW Serious Classification AD SIP Revision for the 2008 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2019-078-SIP-NR). The proposed SIP revision would include a photochemical modeling analysis, a weight of evidence analysis, a RACT analysis, a reasonable available control measures analysis, motor vehicle emissions budgets for 2020, and a contingency plan. This SIP revision would also incorporate proposed revisions to 30 TAC Chapter 115 and proposed revisions to 30 TAC Chapter 117 rules to address major source RACT requirements for nitrogen oxides and volatile organic compounds associated with reclassification from moderate to serious.

The public comment period opened on September 13, 2019 and closed on October 28, 2019. A public hearing on the proposed SIP revision was offered on October 17, 2019 at 2:00 p.m. in the Arlington City Council Chambers, 101 W. Abram Street, Arlington, Texas.

Proposed DFW and HGB Serious Classification RFP SIP Revision for the 2008 Eight-Hour Ozone NAAQS

On September 11, 2019, the commission approved proposal of 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 proposed RFP SIP revision would include an analysis of reasonable further progress toward attainment of the 2008 eight-hour ozone NAAQS, demonstrating a 9% emissions reduction in ozone precursors from January 1, 2018 through December 31, 2020, a 3% emissions 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.

The public comment period opened on September 13, 2019 and closed on October 28, 2019. A public hearing on the proposed SIP revision was offered on October 14, 2019 at 2:00 p.m. in the Texas Department of Transportation District Office Auditorium, 7600 Washington Avenue, Houston, Texas. An additional public hearing was offered on October 17, 2019 at 2:00 p.m. in the Arlington City Council Chambers, 101 W. Abram Street, Arlington, Texas.

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 United States Environmental Protection Agency 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.

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

On December 12, 2018, the commission approved for proposal 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 proposed SIP revision would include a request that the United States Environmental Protection Agency redesignate the DFW area to attainment for the one-hour and 1997 eight-hour ozone NAAQS and provide a maintenance plan that will ensure the area remains in attainment of the NAAQS through 2032.

The public comment period opened on December 14, 2018 and closed on January 15, 2019. A public hearing was held on January 14, 2019 at 2:00 p.m. at the Arlington City Council Chambers, 101 W. Abram Street, Arlington.

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 DFW 2008 Eight-Hour Ozone Standard Nonattainment Area RACT Update SIP Revision

On April 4, 2018, the commission approved proposal of 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 proposed DFW 2008 Eight-Hour Ozone Standard Nonattainment Area RACT Update SIP revision (Non-Rule Project No. 2017-001-SIP-NR) would address 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.

The public comment period opened on April 6, 2018 and closed on May 11, 2018. The commission held a public hearing regarding the proposed voluntary Agreed Order and the proposed SIP revision in Arlington on May 10, 2018 at 2:00 p.m. in the Arlington Municipal Building, City Council Chamber, located at 101 W. Abram Street.

DFW 2008 Eight-Hour Ozone Attainment Demonstration SIP Revision for the 2017 Attainment Year

On July 6, 2016, the commission adopted the DFW 2008 Eight-Hour Ozone Nonattainment Area Attainment Demonstration (AD) SIP Revision for the 2017 Attainment Year (Non-Rule Project No. 2015-014-SIP-NR). This SIP revision includes a photochemical modeling analysis, a weight of evidence analysis, and a reasonably available control measures analysis that reflect a D.C. Circuit Court decision that changed the moderate area attainment deadline for the 2008 eight-hour ozone NAAQS to July 20, 2018 with a 2017 attainment year.

Redesignation Substitute SIP Revision for the DFW One-Hour and 1997 Eight-Hour Ozone Standard Nonattainment Area

On April 27, 2016, the commission adopted the DFW Area Redesignation Substitute SIP Revision for the one-hour and 1997 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2015-002-SIP-NR). The SIP revision formally documents the anti-backsliding obligations for the revoked one-hour and revoked 1997 eight-hour ozone NAAQS and ensures that the substance of the redesignation requirements is met for the DFW area. This redesignation substitute takes the place of a redesignation request and maintenance plan, which the United States Environmental Protection Agency would require for a standard that has not been revoked.

Proposed DFW 2008 Eight-Hour Ozone Nonattainment Area Attainment Demonstration SIP Revision for the 2017 Attainment Year

On December 9, 2015, the commission approved proposal of the DFW 2008 Eight-Hour Ozone Nonattainment Area Attainment Demonstration (AD) SIP Revision for the 2017 Attainment Year (Non-Rule Project No. 2015-014-SIP-NR). This SIP revision would include a photochemical modeling analysis, a weight of evidence analysis, and a reasonably available control measures analysis that reflect a 2017 attainment year to address the D.C. Circuit Court decision that changed the moderate area attainment deadline for the 2008 eight-hour ozone NAAQS to July 20, 2018 with a 2017 attainment year.

The public comment period opened on December 11, 2015, and closed on January 29, 2016. Public hearings on the proposed SIP revision were held in Arlington on January 21, 2016 and in Austin on January 26, 2016.

Proposed Redesignation Substitute SIP Revision for the DFW One-Hour and 1997 Eight-Hour Ozone Standard Nonattainment Area

On September 23, 2015, the commission approved proposal of the DFW Area Redesignation Substitute SIP Revision for the one-hour and 1997 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2015-002-SIP-NR). The SIP revision would satisfy the anti-backsliding obligations for the revoked one-hour and revoked 1997 eight-hour ozone NAAQS and ensure that the substance of the redesignation requirements is met for the DFW area. This redesignation substitute would take the place of a redesignation request and maintenance plan, which the United States Environmental Protection Agency would require for a standard that has not been revoked. A public hearing on this proposed SIP revision will be held on October 29, 2015 at 2:00 p.m in the Arlington City Council Chambers at 101 West Abram Street, Arlington, Texas 76010.

Redesignation Substitute Report for the DFW One-Hour and 1997 Eight-Hour Ozone Standard Nonattainment Area

On August 18, 2015, the TCEQ submitted the Redesignation Substitute Report for the DFW One-Hour and 1997 Eight-Hour Ozone Standard Nonattainment Area to the EPA. This report fulfills the EPA’s redesignation substitute requirements in its Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements; Final Rule (80 FR 12264) to lift anti-backsliding obligations for the revoked one-hour and 1997 eight-hour ozone NAAQS by ensuring that specific redesignation requirements are met for the HGB area under the revoked standard. According to EPA’s 2008 ozone standard SIP requirements rule, this redesignation substitute report is based on certain FCAA redesignation criteria and includes: monitoring data showing attainment of the revoked one-hour and 1997 eight-hour ozone NAAQS; a showing that attainment was due to permanent and enforceable emissions reductions; and a demonstration that the area can maintain the standards through 2028 via emissions inventory trends and future emission projections.

DFW Attainment Demonstration and Reasonable Further Progress SIP Revisions for the 2008 Eight-Hour Ozone NAAQS

On June 3, 2015, the commission adopted two revisions to the Texas State Implementation Plan (SIP) for the DFW nonattainment area for the 2008 eight-hour ozone standard: the DFW Attainment Demonstration (AD) SIP Revision for the 2008 Eight-Hour Ozone Standard (Non-Rule Project No. 2013-015-SIP-NR) and the DFW Reasonable Further Progress (RFP) SIP Revision for the 2008 Eight-Hour Ozone Standard (Non-Rule Project No. 2013-014-SIP-NR). The AD SIP revision incorporates revisions to 30 Texas Administrative Code Chapters 101, 115, and 117.

Update: The 2017 Wise County RFP demonstration in the adopted DFW RFP SIP revision used a transfer of excess VOC reductions from the nine-county area previously designated as nonattainment to the newly designated Wise County. Upon notification that the option to transfer creditable VOC reductions between county groups was no longer available per the EPA's final 2008 Ozone Standard SIP Requirements Rule (80 FR 12264) , the TCEQ corrected the adopted DFW RFP analyses to remove the VOC reduction transfer and credit emission reductions from drilling rig controls that were available but had not been credited. The corrections were submitted to the EPA in an April 22, 2016 technical supplement.

Request for Determination of Attainment of the 1997 Eight-Hour Ozone Standard for the Houston-Galveston-Brazoria (HGB) and Dallas-Fort Worth (DFW) Areas

In a letter dated February 27, 2015 , the TCEQ requested that the United States Environmental Protection Agency (EPA) issue a determination of attainment, also known as a clean data determination, for the 1997 eight-hour ozone National Ambient Air Quality Standard (NAAQS) for the HGB and DFW nonattainment areas. Under 40 Code of Federal Regulations (CFR) §51.918 as well as proposed CFR §51.1118, an EPA determination that an area is attaining the 1997 eight-hour ozone NAAQS suspends certain state planning requirements related to attainment of the standard. This determination of attainment request is based on complete, quality-assured, certified ambient air monitoring data that show the HGB and the DFW areas have monitored attainment of the 1997 eight-hour ozone NAAQS for 2012 through 2014. The HGB area monitored attainment of the standard with an 80 parts per billion (ppb) design value and the DFW area with an 81 ppb design value. The 2014 Annual Data Certification was submitted to the EPA on February 27, 2015.

Emissions Inventory (EI) SIP Revision for the 2008 Eight-Hour Ozone Standard for the Houston-Galveston-Brazoria (HGB) and Dallas-Fort Worth (DFW) Areas

On July 2, 2014, the commission adopted the EI SIP revision for the 2008 Eight-Hour Ozone Standard (Non-Rule Project No. 2013-016-SIP-NR). This SIP revision satisfies the FCAA, §172 and §182 requirements for the HGB and DFW nonattainment areas under the 2008 eight-hour ozone standard. The SIP revision includes 2011 emissions inventories for ozone precursors (volatile organic compounds and nitrogen oxides) from point, area, on-road mobile, non-road mobile, and biogenic emissions source categories as the base year emissions inventories for the HGB and DFW areas.

For additional information, please visit the Air Pollution from Ozone webpage.

Public Information Meeting: Eight-Hour Ozone Planning for the DFW Area

The TCEQ held a public information meeting to provide information on the development of revisions to the state implementation plan (SIP) for the 2008 ozone NAAQS in the 10-county DFW nonattainment area on Thursday, September 5, 2013 at 10:00 a.m. at the North Central Texas Council of Governments (NCTCOG) offices. NCTCOG and United States Environmental Protection Agency representatives also provided updates on local and federal initiatives.

DFW Air Quality Update Presentation

State Implementation Plan Development Presentation

North Central Texas Oil & Gas Vehicle Inventory Study

EPA Presentations

Rights

Page updated on 21NOV2011