About Usdtl

About company

The Official Site of USDTL - At USDTL, we unite the best science available with state-of-the-art technology to bring you the most reliable and valid testing for substances of abuse. Our drug and alcohol testing begins and ends with a strict chain of custody to ensure our results are fully defensible. We screen and confirm our samples on the highest quality instrumentation, and we confirm all presumptive positives on GC-MS and LC-MSMS.