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Controlling On-Road Mobile Source Vehicle Emissions

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

Featured Items:
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:
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.
Tampering of Vehicle Emission Controls
Defines "tampering" and what kinds of vehicle repairs can be made to correct tampering. Texas law prohibits selling or leasing tampered vehicles.
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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