Nationwide Testing Systems, formerly American Drug Screening Service, has been a trusted provider of comprehensive drug and alcohol testing for over 30 years in Houston, Texas, and globally. Specializing in serving companies with multiple locations nationwide, they offer DNA paternity testing and ensure confidentiality and sensitivity in every case.
The company is an expert in drug testing, DOT compliance, and consortium services, including random selection pools in compliance with DOT and TDLR regulations. With SAMSHA DHHS certified laboratories and a focus on fast, friendly service, Nationwide Testing Systems delivers reliable results that clients can trust.
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