Just Provide Us Your Zip Code And We Will Have A Convenient Location Near You

Drug Tests

Drug tests performed in SAMSHA/DHHS Certified Laboratories.

Alcohol Test

Urine, Saliva, and EBT available in most locations.

DNA Paternity Test

Legal DNA paternity testing
Personal testing
Immigration DNA testing

Consortium/Drug & Alcohol Random Pool

Random selection pool in compliance with the Department of Transportation (DOT) and the Texas Department of Licensing and Registration (TDLR). Computer-generated random selection services for employee drug test programs.

Drug Testing/Third Party Administration

A drug screening Consortium/Third Party Administrator (cTPA) manage all or part of an employer’s drug and alcohol testing program.

DOT Supervisor Training

Employers must provide training to all persons who supervise drivers subject to the regulations, in accordance with §382.603.

About Us

Nationwide Testing Systems, formerly American Drug Screening Service, has been providing drug screening in Houston, Texas, and around the world for 30 years. We now offer DNA Paternity testing at a location near you.

We specialize in companies with multiple locations across the nation.

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