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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: 11/30/2023)

New Proposed Houston-Galveston-Brazoria (HGB) Severe Area Attainment Demonstration (AD) SIP Revision for the 2008 Eight-Hour Ozone National Ambient Air Quality Standard (NAAQS)

On November 29, 2023, the commission approved proposal of the HGB Severe Area AD SIP Revision for the 2008 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2023-110-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 will open on December 1, 2023 and close on January 16, 2024. A public hearing will be held for the proposed SIP revision on January 4, 2024 at 7:00 p.m. at the Houston-Galveston Area Council, 3555 Timmons Lane #100, Houston, Texas. The hearing will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

For additional information, please visit the HGB: Latest Ozone Planning Activities webpage.

New Proposed Dallas-Fort Worth (DFW) Severe Area AD 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 will open on December 1, 2023 and close on January 16, 2024. A public hearing will be 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. The hearing will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

For additional information, please visit the DFW: Latest Ozone Planning Activities webpage.

New Proposed DFW and 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 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 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).

The public comment period will open on December 1, 2023 and close on January 16, 2024. Two public hearings will be held for the proposed RFP SIP revision. The first will be held on January 4, 2024 at 7:00 p.m. at the Houston-Galveston Area Council, 3555 Timmons Lane #100, Houston, Texas. The second will be held January 11, 2024 at 7:00 pm at the Arlington City Council Chambers, 101 West Abram Street, Arlington, Texas. The hearings will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

For additional information, please visit the DFW: Latest Ozone Planning Activities and HGB: Latest Ozone Planning Activities webpages.

New Proposed Bexar County 2015 Eight-Hour Ozone Standard Moderate Nonattainment Area Reasonably Available Control Technology (RACT) SIP Revision

On November 29, 2023, the commission approved proposal of the Bexar County 2015 Eight-Hour Ozone Standard Moderate Nonattainment Area RACT SIP Revision (Non-Rule Project No. 2023-132-SIP-NR). The proposed SIP revision includes a RACT analysis to address federal Clean Air Act RACT requirements for the moderate classification.

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 will open on December 1, 2023 and close on January 16, 2024. A public hearing will be held for the proposed SIP revision on January 9, 2024 at 7:00 p.m. in the Alamo Area Council of Governments board room, located at 2700 NE Loop 410, Suite 101, San Antonio, Texas. The hearing will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

For additional information, please visit the San Antonio: Latest Ozone Planning Activities webpage.

New Bexar County Inspection and Maintenance (I/M) SIP Revision

On November 29, 2023, the commission adopted the Bexar County I/M SIP Revision (Non-Rule Project No. 2022-027-SIP-NR). The SIP revision will implement a vehicle I/M program in the Bexar County 2015 eight-hour ozone NAAQS nonattainment area by no later than November 1, 2026.

The SIP revision also incorporates 30 Texas Administrative Code Chapter 114, Control of Air Pollution from Motor Vehicles rulemaking (Rule Project No. 2022-026-114-AI) relating to the expansion of the existing I/M program into the Bexar County 2015 ozone NAAQS nonattainment area.

For additional information, please visit the San Antonio: Latest Ozone Planning Activities webpage.

Proposed DFW Moderate Area 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 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 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 (Rule Project No. 2022-026-114-AI), relating to the state’s low Reid vapor pressure control requirements, into the SIP.

The public comment period will open on June 2, 2023 and close on July 17, 2023. A public hearing will be 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. The hearing will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

For additional information, please visit the DFW: Latest Ozone Planning Activities webpage.

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 consistent with the moderate ozone nonattainment area requirements of FCAA and the 2015 eight-hour ozone NAAQS SIP requirements. In addition to demonstrating emissions reductions, this proposed SIP revision would also provide motor vehicle emissions budgets for the 2023 attainment year.

The public comment period will open on June 2, 2023 and close on July 17, 2023. Two public hearings will be held for the proposed RFP SIP revision. The first will be held on July 6, 2023 at 7:00 p.m. at the Arlington City Council Chambers, 101 West Abram Street, Arlington, Texas. The second will be held July 11, 2023 at 7:00 pm at the Houston-Galveston Area Council, 3555 Timmons Lane #100, Houston, TX. The hearings will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

For additional information, please visit the DFW: Latest Ozone Planning Activities and HGB: Latest Ozone Planning Activities webpages.

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

On May 31, 2023, the commission approved proposal of the HGB Moderate Area AD SIP Revision for the 2015 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2022-022-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 2023, and a contingency plan.

The public comment period will open on June 2, 2023 and close on July 17, 2023. A public hearing will be held for the proposed SIP revision on July 11, 2023 at 7:00 p.m. at the Houston-Galveston Area Council, 3555 Timmons Lane #100, Houston, Texas. The hearing will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

For additional information, please visit the HGB: Latest Ozone Planning Activities webpage.

Proposed Bexar County Moderate Area AD SIP Revision for the 2015 Eight-Hour Ozone NAAQS

On May 31, 2023, the commission approved proposal of the Bexar County 2015 Eight-Hour Ozone Moderate Area AD SIP Revision for the 2015 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2022-025-SIP-NR). The proposed SIP revision includes a photochemical modeling analysis, a weight of evidence analysis, a reasonably available control measures analysis, motor vehicle emissions budgets for 2023, and a contingency plan.

The public comment period will open on June 2, 2023 and close on July 17, 2023. A public hearing will be held for the proposed SIP revision on July 13, 2023 at 7:00 p.m. at the Alamo Area Council of Governments, 2700 Northeast Loop 410, Suite 101, San Antonio, Texas. The hearing will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage

For additional information, please visit the San Antonio: Latest Ozone Planning Activities webpage.

Proposed Bexar County Moderate Area RFP SIP Revision for the 2015 Eight-Hour Ozone NAAQS

On May 31, 2023, the commission approved proposal of the Bexar County Moderate Area RFP SIP Revision for the 2015 Eight-Hour Ozone NAAQS (Non-Rule Project No. 2022-024-SIP-NR). This proposed SIP revision demonstrates progress toward attainment of the 2015 ozone NAAQS using reductions of NOX and VOC emissions for the Bexar County 2015 ozone NAAQS moderate nonattainment area for the 2023 attainment year as well as the 2024 contingency year. This proposed SIP revision would also provide motor vehicle emissions budgets for the 2023 attainment year.

The public comment period will open on June 2, 2023 and close on July 17, 2023. A public hearing will be held for the proposed SIP revision on July 13, 2023 at 7:00 p.m. at the Alamo Area Council of Governments, 2700 Northeast Loop 410, Suite 101, San Antonio, Texas. The hearing will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage

For additional information, please visit the San Antonio: Latest Ozone Planning Activities webpage.

Proposed Bexar County I/M SIP Revision

On May 31, 2023, the commission approved proposal of the Bexar County I/M SIP Revision (Non-Rule Project No. 2022-027-SIP-NR). The proposed SIP revision would implement a vehicle I/M program in the Bexar County 2015 eight-hour ozone National Ambient Air Quality Standard (NAAQS) nonattainment area by no later than November 1, 2026. The associated proposed 30 Texas Administrative Code Chapter 114, Control of Air Pollution from Motor Vehicles rulemaking (Rule Project No. 2022-026-114-AI) expands the existing I/M program into the Bexar County 2015 ozone NAAQS nonattainment area.

The public comment period will open on June 2, 2023 and close on July 17, 2023. A public hearing will be held for the proposed SIP revision on July 13, 2023 at 7:00 p.m. at the Alamo Area Council of Governments, 2700 Northeast Loop 410, Suite 101, San Antonio, Texas. The hearing will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage

For additional information, please visit the San Antonio: Latest Ozone Planning Activities Webpage.

Public Information Meetings – Proposed Particulate Matter NAAQS Revision

The Texas Commission on Environmental Quality (TCEQ) hosted virtual public information meetings to provide information on the potential impacts of the United States Environmental Protection Agency’s (EPA) proposal to lower the primary annual fine particulate matter (PM2.5) National Ambient Air Quality Standard (NAAQS) from its current level of 12 micrograms per cubic meter (µg/m3) to between 9 and 10 µg/m3.

The TCEQ provided information on the proposed NAAQS revision, designations process, and requirements for an area designated nonattainment. These meetings focused on implementation of the potential revised NAAQS and not on the health effects associated with the NAAQS revision. The virtual public information meetings were held for potentially impacted counties on the following days:

  • March 3, 2023 from 9:30 a.m. to 11 a.m. (CST) – Atascosa and Travis Counties
  • March 3, 2023 from 1:30 p.m. to 3 p.m. (CST) – Harris, Jefferson, and Montgomery Counties
  • March 6, 2023 from 2:30 p.m. to 4 p.m. (CST) – Cameron, El Paso, Hidalgo, Kleberg, and Webb Counties
  • March 10, 2023 from 9:30 a.m. to 11 a.m. (CST) – Bowie, Dallas, Harrison, and Tarrant Counties

Information on the PM2.5 NAAQS proposal is available on the EPA’s website.

North Central Texas Council of Goverments (NCTCOG) - Federal Clean Air Act (FCAA) Section 185 Fee Meeting Announcement

On February 17, 2023, NCTCOG hosted a meeting with the EPA and the TCEQ to discuss impending federal requirements for stationary source fees. This meeting provided an overview of the FCAA Section 185 fee requirements for point sources (power plants, cement kilns, and more), and the fiscal burden the Dallas-Fort Worth (DFW) severe ozone nonattainment area will face if the area fails to attain the 2008 eight-hour ozone NAAQS by July 20, 2027.  

El Paso County Emissions Inventory (EI) SIP Revision for the 2015 Eight-Hour Ozone NAAQS

On November 16, 2022, the commission adopted the 2015 Eight-Hour Ozone NAAQS EI SIP Revision for the El Paso County portion of the El Paso-Las Cruces, Texas-New Mexico Nonattainment Area. The SIP revision satisfies the federal Clean Air Act, §172(c)(3) and §182(a)(1) EI reporting requirements for El Paso County for the 2015 eight-hour ozone NAAQS. The SIP revision also includes a certification statement to confirm that the emissions statements and nonattainment new source review requirements have been met for El Paso County.

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

El Paso Exceptional Event Demonstration

On December 23, 2020, high winds caused blowing dust in and around El Paso County. Due to these high winds, the PM10 levels at the Socorro Hueco and El Paso Mimosa monitors in El Paso County on December 23, 2020, were not reasonably controllable or preventable. The Texas Commission on Environmental Quality plans to submit an exceptional event demonstration to the EPA to exclude these data. TCEQ posted this demonstration for written public comment on October 26, 2022. The TCEQ will accept public comments on the demonstration until December 2, 2022. All comments become part of the public record. For more information on the demonstration and the comment process, please visit the Particulate Matter Data Exceptional Event Flag Demonstrations webpage.

Howard County Attainment Demonstration SIP Revision for the 2010 One-Hour Sulfur Dioxide (SO2) NAAQS

On October 5, 2022, the commission adopted the Howard County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS (Project No. 2021-010-SIP-NR). The SIP revision addresses federal Clean Air Act (FCAA) SIP requirements for the Howard County SO2 nonattainment area by including a comprehensive inventory of current SO2 emissions; evaluation and provision for implementing all reasonably available control measures (RACM) and reasonably available control technology (RACT); air quality dispersion modeling to demonstrate attainment; a reasonable further progress demonstration; contingency measures; and certification that nonattainment new source review requirements are met.

The associated 30 Texas Administrative Code (TAC) Chapter 112, Subchapter E rulemaking (Rule Project No. 2021-035-112-AI) provides the enforceable control strategy needed to demonstrate attainment of the 2010 SO2 NAAQS by the April 30, 2026, attainment deadline.

Hutchinson County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS

On October 5, 2022, the commission adopted the Hutchinson County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS (Project No. 2021-011-SIP-NR). The SIP revision addresses FCAA SIP requirements for the Hutchinson County SO2 nonattainment area by including a comprehensive inventory of current SO2 emissions; evaluation and provision for implementing all RACM and RACT; air quality dispersion modeling to demonstrate attainment; a reasonable further progress demonstration; contingency measures; and certification that nonattainment new source review requirements are met.

The associated 30 TAC Chapter 112, Subchapter F rulemaking (Rule Project No. 2021-035-112-AI) provides the enforceable control strategy needed to demonstrate attainment of the 2010 SO2 NAAQS by the April 30, 2026, attainment deadline.

Navarro County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS

On October 5, 2022, the commission adopted the Navarro County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS (Project No. 2021-012-SIP-NR). The SIP revision addresses FCAA SIP requirements for the Navarro County SO2 nonattainment area by including a comprehensive inventory of current SO2 emissions; evaluation and provision for implementing all RACM and RACT; air quality dispersion modeling to demonstrate attainment; a reasonable further progress demonstration; contingency measures; and certification that nonattainment new source review requirements are met.

The associated 30 TAC Chapter 112, Subchapter G rulemaking (Rule Project No. 2021-035-112-AI) provides the enforceable control strategy needed to demonstrate attainment of the 2010 SO2 NAAQS by the April 30, 2026 attainment date.

Dallas-Fort Worth (DFW) Air Quality Technical Information Meeting

On August 24, 2022, the TCEQ held a virtual Air Quality Technical Information Meeting for the DFW nonattainment area. The purpose of the meeting was to inform stakeholders of air quality modeling and other technical information relevant to the ozone nonattainment area.

Presentation materials are available to view on the DFW AQ TIM webpage.

San Antonio (SAN) Air Quality Technical Information Meeting

On August 22, 2022, the TCEQ held a virtual Air Quality Technical Information Meeting for the SAN nonattainment area. The purpose of the meeting was to inform stakeholders of air quality modeling and other technical information relevant to the ozone nonattainment area.

Presentation materials are available to view on the SAN AQ TIM webpage.

Houston-Galveston-Brazoria (HGB) Air Quality Technical Information Meeting

On July 28, 2022, the TCEQ held a virtual Air Quality Technical Information Meeting for the HGB nonattainment area. The purpose of the meeting was to inform stakeholders of air quality modeling and other technical information relevant to the ozone nonattainment area.

Presentation materials are available to view on the HGB AQ TIM webpage.

Proposed El Paso County Emissions Inventory (EI) SIP Revision for the 2015 Eight-Hour Ozone NAAQS

On June 15, 2022, the commission approved proposal of the 2015 Eight-Hour Ozone NAAQS EI SIP Revision for the El Paso County portion of the El Paso-Las Cruces, Texas-New Mexico Nonattainment Area. The proposed SIP revision would satisfy the federal Clean Air Act, §172(c)(3) and §182(a)(1) EI reporting requirements for El Paso County for the 2015 eight-hour ozone NAAQS. The proposed SIP revision would also include a certification statement to confirm that the emissions statements and nonattainment new source review requirements have been met for El Paso County.

The public comment period will open on June 17, 2022 and close on July 21, 2022. A public hearing on the proposed SIP revision will be held on July 18, 2022 at 6:00 p.m. MDT in the Carlos M. Ramirez TecH2O Water Resources Learning Center, located at 10751 Montana Avenue in El Paso, Texas. The hearing will be conducted in English, and Spanish language interpretation services will be made available. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

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

Proposed Howard County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS

On April 13, 2022, the commission approved proposal of the Howard County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS (Project No. 2021-010-SIP-NR). The proposed SIP revision addresses federal Clean Air Act (FCAA) SIP requirements for the Howard County SO2 nonattainment area by including a comprehensive inventory of current SO2 emissions; evaluation and provision for implementing all reasonably available control measures (RACM) and reasonably available control technology (RACT); air quality dispersion modeling to demonstrate attainment; a reasonable further progress demonstration; contingency measures; and certification that nonattainment new source review requirements are met.

The associated proposed 30 Texas Administrative Code (TAC) Chapter 112, Subchapter E rulemaking (Rule Project No. 2021-035-112-AI) would provide the enforceable control strategy needed to demonstrate attainment of the 2010 SO2 NAAQS by the April 30, 2026, attainment deadline.

A public comment period will open on April 15, 2022 and close on June 2, 2022. A public hearing on the proposed SIP revision will be held on May 18, 2022 at 6:00 p.m. in the Dora Roberts Community Center Ball Room located at 100 Whipkey Drive in Big Spring, Texas. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

Proposed Hutchinson County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS

On April 13, 2022, the commission approved proposal of the Hutchinson County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS (Project No. 2021-011-SIP-NR). The proposed SIP revision addresses FCAA SIP requirements for the Hutchinson County SO2 nonattainment area by including a comprehensive inventory of current SO2 emissions; evaluation and provision for implementing all RACM and RACT; air quality dispersion modeling to demonstrate attainment; a reasonable further progress demonstration; contingency measures; and certification that nonattainment new source review requirements are met.

The associated proposed 30 TAC Chapter 112, Subchapter F rulemaking (Rule Project No. 2021-035-112-AI) would provide the enforceable control strategy needed to demonstrate attainment of the 2010 SO2 NAAQS by the April 30, 2026, attainment deadline.

A public comment period will open on April 15, 2022 and close on June 2, 2022. A public hearing on the proposed SIP revision will be held on May 19, 2022 at 6:00 p.m. in the Borger City Hall City Council Room at 600 North Main Street in Borger, Texas. The hearing will be conducted in English. Language interpretation services may be requested. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

Proposed Navarro County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS

On April 13, 2022, the commission approved proposal of the Navarro County Attainment Demonstration SIP Revision for the 2010 One-Hour SO2 NAAQS (Project No. 2021-012-SIP-NR). The proposed SIP revision addresses FCAA SIP requirements for the Navarro County SO2 nonattainment area by including a comprehensive inventory of current SO2 emissions; evaluation and provision for implementing all RACM and RACT; air quality dispersion modeling to demonstrate attainment; a reasonable further progress demonstration; contingency measures; and certification that nonattainment new source review requirements are met.

The associated proposed 30 TAC Chapter 112, Subchapter G rulemaking (Rule Project No. 2021-035-112-AI) would provide the enforceable control strategy needed to demonstrate attainment of the 2010 SO2 NAAQS by the April 30, 2026 attainment date.

A public comment period will open on April 15, 2022 and close on June 2, 2022. A public hearing on the proposed SIP revision will be held on May 23, 2022 at 6:00 p.m. in the Cook Education Center of Navarro College located at 3100 West Collin Street in Corsicana, Texas. For more information, please visit the Proposed SIP Revisions and Public Hearing Information section of the Texas SIP Revisions webpage.

Redesignation Request and Maintenance Plan SIP Revision for the Freestone-Anderson and Titus 2010 SO2 NAAQS Nonattainment Areas

On February 23, 2022, the commission adopted the Redesignation Request and Maintenance Plan SIP Revision for the Freestone-Anderson and Titus 2010 SO2 NAAQS Nonattainment Areas (Non-Rule Project No. 2021-007-SIP-NR). The SIP revision includes a request that the United States Environmental Protection Agency (EPA) redesignate the Freestone-Anderson and Titus nonattainment areas to attainment for the 2010 SO2 NAAQS and provides 10-year maintenance plans for both areas consistent with FCAA, §175A requirements. The SIP revision also addresses the comprehensive emissions inventory and nonattainment new source review certification statement SIP requirements provided under Part D of the FCAA.

Rusk-Panola Attainment Demonstration SIP Revision for the 2010 SO2 NAAQS and Associated Agreed Order

On February 9, 2022, the commission adopted the Rusk-Panola Attainment Demonstration SIP Revision for the 2010 SO2 NAAQS (Non-Rule Project No. 2020-057-SIP-NR). The SIP revision includes a comprehensive inventory of current SO2 emissions; evaluation and provision for implementing all reasonably available control measures RACM and RACT; air quality dispersion modeling to demonstrate attainment of the 2010 SO2 NAAQS; a reasonable further progress (RFP) demonstration; contingency measures; and certification that nonattainment new source review requirements are met for the Rusk-Panola 2010 SO2 NAAQS nonattainment area.

An associated Agreed Order with Luminant Generation Company, LLC (Non-Rule Project No. 2021-013-OTH-NR) provides the enforceable control strategy for this attainment demonstration by documenting the commission's order, and the company's agreement, to comply with requirements identified for the Martin Lake Steam Electric Station, pursuant to the Texas Clean Air Act, the Texas Health & Safety Code, and the FCAA.

El Paso County International Transport 179B Demonstration

The TCEQ is taking public comment on a demonstration showing that El Paso County would have attained the 2015 eight-hour ozone NAAQS by the marginal attainment date of August 3, 2021 “but for” international contributions from neighboring Ciudad Juárez in Mexico. The FCAA, §179B(b) retrospective demonstration describes the technical analyses that support the TCEQ’s conclusion. Comments will be accepted from December 17, 2021 through January 21, 2022. For more information on the demonstration and the comment process, please visit the 179B Demonstration for El Paso County webpage.

Proposed Rusk-Panola Attainment Demonstration SIP Revision for the 2010 SO2 NAAQS and Associated Agreed Order

On September 8, 2021, the commission approved proposal of the Rusk-Panola Attainment Demonstration SIP Revision for the 2010 SO2 NAAQS (Non-Rule Project No. 2020-057-SIP-NR). The proposed SIP revision includes a comprehensive inventory of current SO2 emissions; evaluation and provision for implementing all RACM and RACT; air quality dispersion modeling to demonstrate attainment of the 2010 SO2 NAAQS; an RFP demonstration; contingency measures; and certification that nonattainment New Source Review requirements are met for the Rusk-Panola 2010 SO2 NAAQS nonattainment area.

An associated proposed Agreed Order with Luminant Generation Company, LLC (Non-Rule Project No. 2021-013-OTH-NR) provides the enforceable control strategy for this attainment demonstration by documenting the commission's order, and the company's agreement, to comply with requirements identified for the Martin Lake Steam Electric Station, pursuant to the Texas Clean Air Act, the Texas Health & Safety Code, and the FCAA.

The public comment period will open on September 10, 2021 and close on October 13, 2021. A virtual public hearing on the proposed SIP revision will be held on October 12, 2021 at 2:00 p.m. Central Standard Time. Individuals who plan to attend the public hearing must register by October 5, 2021. For information about how to register, please visit the Proposed SIP Revisions and Public Hearing Section of the Texas SIP Revisions webpage.

Proposed Redesignation Request and Maintenance Plan SIP Revision for the Freestone-Anderson and Titus 2010 SO2 NAAQS Nonattainment Areas

On August 25, 2021, the commission approved proposal of the Redesignation Request and Maintenance Plan SIP Revision for the Freestone-Anderson and Titus 2010 SO2 NAAQS Nonattainment Areas (Non-Rule Project No. 2021-007-SIP-NR). The proposed SIP revision includes a request that the EPA redesignate the Freestone-Anderson and Titus nonattainment areas to attainment for the 2010 SO2 NAAQS and provides 10-year maintenance plans for both areas consistent with FCAA, §175A requirements. The proposed SIP revision also addresses the comprehensive emissions inventory and nonattainment new source review certification statement SIP requirements provided under Part D of the FCAA.

The public comment period will open on August 27, 2021 and close on September 29, 2021. A virtual public hearing on the proposed SIP revision will be held on September 28, 2021 at 2:00 p.m. Central Standard Time. Individuals who plan to attend the public hearing must register by September 21, 2021. For information about how to register, please visit the Proposed SIP Revisions and Public Hearing Section of the Texas SIP Revisions webpage.

Request for Reasonably Available Control Measures Ideas

The TCEQ is requesting ideas for potential RACM that could be implemented in the Dallas-Fort Worth (DFW), Houston-Galveston-Brazoria (HGB), and San Antonio nonattainment areas. RACM is a requirement under the FCAA, §172(c)(1) and is required for nonattainment areas with an ozone classification of moderate nonattainment and above. Potential RACM measures submitted to the TCEQ will be used to assist in nonattainment area planning for the 2008 and 2015 eight-hour ozone national ambient air quality standards. The deadline to submit RACM ideas is August 6, 2021 by 11:59 p.m. 

Information about RACM is available in the presentation provided below. 

Information about this request and RACM idea submissions should be directed to Joseph Thomas at Joseph.Thomas@tceq.texas.gov and Anthony DeJesus at Anthony.Dejesus@tceq.texas.gov.

2021 Regional Haze SIP Revision

On June 30, 2021, the commission adopted the 2021 Regional Haze SIP Revision (Project No. 2019-112-SIP-NR). The SIP revision demonstrates compliance with the regional haze requirements of FCAA, §169A and the EPA's Regional Haze Rule for the second planning period. The SIP revision addresses regional haze in Big Bend and Guadalupe Mountains National Parks in Texas and Class I areas located outside Texas that may be affected by emissions from within the state.

DFW Exceptional Events Demonstration

The TCEQ has identified natural and human caused wildfire events in Colorado and California that led to high concentrations of ozone at the Grapevine Fairway monitor on August 16, 17, and 21, 2020. Consequently, the TCEQ submitted an exceptional event demonstration to the EPA requesting the EPA exclude ozone data at the Grapevine Fairway monitor on those dates when making determinations for attainment or other regulatory purposes. The TCEQ accepted public comment from April 14, 2021 to May 14, 2021 on the exceptional event demonstration. For more information on the demonstration and the comment process, please visit the Ozone Data Exceptional Event Flag Demonstrations webpage.

Round 4 Designations for the 2010 SO2 NAAQS

On March 26, 2021, the EPA published final Round 4 designations for the 2010 SO2 NAAQS. TCEQ staff held an informational kickoff meeting for sources in the newly designated nonattainment areas on March 25, 2021.

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

On September 25, 2020, the commission approved the El Paso One-Hour Ozone Redesignation Request and Maintenance Plan SIP Withdrawal (Non-Rule Project No. 2020-040-SIP-NR). This action withdraws from the EPA's review, the El Paso Redesignation Request and Maintenance Plan SIP Revision for the One-Hour Ozone 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 approved the BPA One-Hour Ozone Redesignation Request and Maintenance Plan SIP Withdrawal (Non-Rule Project No. 2020-039-SIP-NR). This action withdraws 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 withdrawn portion concerns the state's redesignation request and maintenance plan for the 1979 one-hour ozone NAAQS.

Bexar County 2015 Eight-Hour Ozone Nonattainment Area 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 HGB, 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 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 FCAA 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 FCAA 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. 

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