Ascertain Forensics at Redwood Toxicology Laboratory is a federally certified laboratory specializing in accurate laboratory-based testing with rapid turnaround time. Located in Santa Rosa, California, Redwood Toxicology Laboratory started as a small business in 1994 and operates today as the largest single-location toxicology laboratory in the United States. We employ more than 250 people, process more than 4.5 million specimens, and sell more than 10 million rapid onsite alcohol and drugs-of-abuse devices each year.
Our laboratory has more than two decades of experience providing drug-testing solutions to more than 15,000 active agencies across the nation.
- Clients include district attorneys, police, sheriff, correctional, probation/parole, drug courts, DUI courts, mental health facilities, and private treatment agencies.
- More than 15,000 active agencies across the nation, with more than 2,500 clients in California.
- 48 counties in California have an active probation/parole account with our laboratory.
- We hold state-level contracts in more than two dozen states, including two cooperative multi-state contracts for convenient purchasing options.