OmniLab Diagnostics provides fast, reliable Drug Testing and DOT compliance services for individuals, employers, and transportation companies. Based in Riverside, California (CA), we offer in-lab testing and mobile/on-site specimen collections, available by appointment only, with flexible before- and after-hours scheduling. Our certified team conducts urine, hair, saliva, and alcohol screenings with strict chain-of-custody procedures to ensure accurate results. We also provide DNA testing, emplo