Diversify Your Laboratory Provider Network.

Ascertain Forensics at Redwood Toxicology Laboratory understands that forensic toxicology testing requires a qualified drug testing team.
We have decades of combined experience in the postmortem and alcohol testing field. Ascertain Forensics offers timely results, effective training resources, reasonable prices, and excellence in customer support. We provide reliable and actionable information through forensic toxicology testing.

Human Performance (DUI/DUID) Toxicology

Our forensic testing menu is expanding to include driving under the influence of alcohol and drugs (DUI/DUID), court ordered specimen retests, and other human performance testing to include drug facilitated assault (DFA).

Forensic Postmortem Toxicology

Our American Board of Forensic Toxicology (ABFT) accredited laboratory is equipped with superior analytical methods and state- of-the-art technology to provide you with timely results.

Drug Chemistry and Contraband Testing

Our testing methods provide powerful, effective tools in identifying identifying drugs and contraband, including pills, powders, liquids, organic material or paraphernalia. 

Over two decades of experience providing drug-testing
solutions to more than 15,000 agencies.

Superior services and support.

Ascertain Forensics has the experience and resources to serve your forensic toxicology needs. Our laboratory is ABFT-accredited and is a California Title 17 Forensic Alcohol laboratory. We utilize the most sophisticated technology and sensitive equipment available for our human performance, postmortem and contraband detection services.

Expedite your toxicology tests.

The Ascertain Forensics laboratory offers superior analytical methods and state-of-the art technology. We are uniquely positioned to help streamline your forensic testing processes and diversify your forensic toxicology laboratory provider network.

Fentanyl and NPS drug testing

As a leader in forensic toxicology, we are committed to providing innovative solutions and exceptional support to agencies and attorney’s seeking to identify relevant fentanyl analogs, novel psychoactive substances (NPS), routine toxicology testing, or court ordered retesting.

A Leading Laboratory

Equipped with state-of-the-art technology, automated computer systems, and a skilled laboratory staff, we ensure accurate analysis of human performance, postmortem, and contraband specimens.

Contact Us

contact us online


3650 Westwind Blvd
Santa Rosa CA, 95403

© 2022 Redwood Toxicology Laboratory. All rights reserved. All trademarks referenced are trademarks of Redwood Toxicology Laboratory or their respective owners. Any photos displayed are for illustrative purposes only. Any person depicted in such photos is a model. Your use of this website and the information contained herein is subject to our  Website Terms and Conditions and Privacy PolicyInterest-Based Ads.