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Texas Low Emission Diesel (TxLED) Program

Information relating to the Texas Low Emission Diesel (TxLED) program, approved TxLED alternative diesel fuel formulations, producer / importer registration forms, quarterly reporting forms, alternative emission reduction plan (AERP) forms, and regulatory guidance.
Texas Low Emission Diesel (TxLED) Program
Information relating to the TxLED program, approved alternative diesel fuel formulations, producer/importer registration forms, quarterly reporting forms, alternative emission reduction plan (AERP) forms, and regulatory guidance. The TxLED Program is implemented to reduce emissions of nitrogen oxides from diesel-powered motor vehicles and non-road equipment.
TxLED Affected Counties
List of 110 Texas counties in which the Texas Low Emission Diesel (TxLED) regulations apply. Map, rules, contacts.
TxLED Producer and Importer Registration
All diesel fuel producers and importers must register with the TCEQ by no later than 45 days after the first date that diesel fuel from their production or import facilities is made available for use in any of the 110 Texas counties affected by the Texas Low Emission Diesel (TxLED) regulations. Download the necessary registration form here.
TxLED Quarterly Reporting
All diesel producers and importers that have registered with the Texas Low Emission Diesel (TxLED) program are required to submit a TxLED quarterly report to the TCEQ no later than 45 days after the end of each calendar quarter. Download the necessary TxLED quarterly reporting forms here.
Approved TxLED Alternative Diesel Fuel Formulations
Diesel fuel blends or additive blends approved by the TCEQ as alternative diesel fuel formulations for Texas Low Emission Diesel (TxLED) may be used by producers to comply with the TxLED regulations.
FileApproved Alternative Diesel Fuel Formulations
Excel spreadsheet. Any of the TCEQ-approved alternative diesel fuel formulations listed in this spreadsheet may be used to produce Texas Low Emission Diesel Fuel (TxLED).
Draft TxLED Regulatory Guidance Document
Answers to common questions regarding the TCEQ's implementation and enforcement of the Texas Low Emission Diesel (TxLED) rules and requirements.
TxLED Alternative Emission-Reduction Plans (AERP)
A diesel-fuel producer may use an AERP to demonstrate compliance with the Texas Low Emission Diesel (TxLED) regulations.
Texas Low Emission Diesel (TxLED) Stakeholder Group
Information about the TxLED Stakeholder Group, including meeting minutes and a schedule of future meetings.
National Clean Diesel Campaign
A campaign by the U.S. Environmental Protection Agency to reduce diesel emissions by working with manufacturers, fleet operators, air quality professionals, environmental and community organizations, and state and local officials.
Federal Register: EPA approval of TCEQ April 26, 2006, May 9, 2007, and May 23, 2007, revisions to the TxLED rules
Federal Register notice: U.S. Environmental Protection Agency approval of the TCEQ's April 26, 2006, May 9, 2007, and May 23, 2007, revisions to the TxLED rules.
Federal Register: EPA approval of parts of the TCEQ March 9, 2005, revision to the TxLED rules
Federal Register notice: U.S. Environmental Protection Agency approval of parts of the TCEQ's March 9, 2005, revision to the TxLED rules.
EPA Publication: Strategies and Issues in Correlating Diesel Fuel Properties with Emissions (Unified Model)
Publication EPA420-P-01-001 (July 2001) describes the Unified Model.
TCEQ Memorandum: Tank and Material Handling Authorization for Required Diesel Additives
TCEQ Memorandum: Tank and Material Handling Authorization for Required Diesel Additives; relating to additive-based TxLED alternative diesel fuel formulations.