How Do I Apply for a Voucher?
Each Drive a Clean Machine program administrator has their own application and contact information to apply for a voucher.
Please see your program administrators information below for availability of address, phone, and online materials.
 Return to Drive a Clean Machine
 Houston-Galveston Area Council (HGAC)
If your vehicle is registered in an HGAC area county, please use the PDF application below and mail to the following address. Or visit or phone the county for more information.
Download the electronic application (in PDF)
Mailing address:
P.O. Box 22777
Houston, TX 77227-2777
Phone: 866-237-9392
Fax: 832-681-2530
Visit the HGAC Web site:
www.h-gac.com
North Central Texas Council of Government (NCTCOG)
If your vehicle is registered in a NCTCOG area county, please use the PDF application below and drop off or mail to the following addresses. Or visit or phone the county for more information.
Download the electronic application (in interactive PDF)
Mailing address:
P.O. Box 5888
Arlington TX 76005-5888
Phone: 800-898-9103 general public
Visit NCTCOG Web site:
www.nctcog.org/airchecktexas
Travis County
If your vehicle is registered in Travis County, please contact the county for more information.
Phone: 512-267-0301
An electronic application is not yet available.
Williamson County
If your vehicle is registered in Williamson County, please use the PDF application below and drop off or mail to the following address. Or visit or phone the county for more information.
Download the electronic application (in interactive PDF)
Street and mailing address:
350 Discovery Blvd., #207
Cedar Park, TX 78613
Phone: 800-978-1766
or 512-260-4227
Visit Williamson County Web site:
www.wilcogov.org/aircheck/ |
