Nationwide Testing Systems, formerly American Drug Screening Service, has provided comprehensive drug and alcohol testing in Houston, Texas, and around the world for 30 years. We tailor drug screens to suit the special needs of our clients for the workplace, legal, and individual testing.
Nationwide Testing Systems also provides a DNA paternity test. We treat every case with the utmost respect, confidentiality, and sensitivity. Whether you just want peace of mind or need legal "proof," we can satisfy your needs. Nationwide Testing Systems offers low prices, fast results, and pain-free sample collection.
Computer-generated selection service for random drug screening programs for governing authority.
Percentages and frequency of random drug tests are determined by your companies’ drugs.
Screening Policy.