Air Check Texas

The AirCheckTexas - Drive a Clean Machine Repair and Replacement Assistance Program is designed to help vehicle owners comply with vehicle emissions standards to reduce ozone-forming exhaust from on-road motor vehicles. It focuses on the highest emission vehicles and provides an incentive for citizens to contribute to the regional air quality solution.

Vehicle owners and their registered vehicles in the Williamson County may be eligible for repair assistance if their vehicle fails the mandatory emissions inspection test up to $600 for emission related repairs is available if qualified. Up to $3,500 is available for replacement of vehicles that are ten years old or older and have passed both safety and emissions on the inspection test.


You must meet these 2013 net* income requirements: (these income amounts change annually in February)


Size of Household


Maximum Net
Income Per Year

















Over 8

Add $12,060 for each additional member

*As determined by using the Adjusted Gross income (AGI) on the most recent Federal Income Tax form.
Note: The value of the replacement vehicle may affect eligibility requirements and/or benefits for financial assistance programs, such as Temporary Assistance for Needy Families. Please contact your case worker if you have any questions.


 FUNDS Available!

Drive a Clean Machine Program Update - Friday, August 03, 2012

Drive a Clean Machine Program Update

On September 1, 2012, the AirCheckTexas Drive a Clean Machine program will have changes to the eligibility requirements for ALL replacement vehicles.

Effective September 1, 2012, eligible vehicles are:

  • Model year 2013-2010 cars, SUVs, and vans;
  • Model year 2013-2011 pickup trucks; and
  • Model year 2013-2010 hybrid, electric, natural gas and all vehicles that have been certified to meet federal Tier 2, Bin 3 or cleaner Bin certification vehicles.

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