Controlling On-Road Mobile Source Vehicle Emissions

Texas has several programs to reduce and control emissions from mobile sources that are driven on roads.

Texas Motor Vehicle Inspection/Maintenance Program

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Gasoline Vapor Recovery (Stages I and II) Information on Stage I and II gasoline vapor recovery programs including equipment, testing, operation requirements, and exemptions. Requirements vary by county as described here.

Topics Under This Category:

	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.
	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.
	Motor Vehicle Fuel Programs in Texas Information and links to Regional low RVP gasoline, Texas Low-Emission Diesel (TxLED), and El Paso fuel programs.
	Reformulated Gasoline Program Purpose of Reformulated Gasoline and the Texas counties required to use it.
	Smoking Vehicle Program 1-800-453-SMOG Information and reporting of vehicles that smoke excessively.
	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.
	Texas Low Emission Diesel (TxLED) Stakeholder Group Information about the TxLED Stakeholder Group, including meeting minutes and a schedule of future meetings.
	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.
	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.
	Understanding Fire Hazards with Catalyst-Equipped Cars U.S. EPA publication on the history and precautions associated with automobile catalyst systems.
	Vehicle Emissions Inspections in Texas Program overview of the vehicle inspection and maintenance (I/M) program in Texas

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