Drug Detection Laboratories, Inc., established in 1984,  provides the highest quality and most sensitive drug and alcohol testing for courts, counselors, hospitals, public and private attorneys. Expert data interpretation and testimony is often critical, and may be provided by our experienced staff.

This site is intended to provide general information regarding drug and alcohol testing for anyone who may be interested  Consultation with a qualified forensic toxicologist is always recommened.

Meet the Drug Detection Laboratories Staff     DDL was founded in 1984 by Jeffery and Susan Zehnder, Forensic Toxicologists who now have over 45 years of combined experience in the Forensic Toxicology field. DDL provides a full service...   more...

Breath Testing Resources and Devices  Click on this link to access information on breath testing devices and manufacturers information......more

Links to many resources including Medline, TOXNET, NIDA, and many others..

Urine drug testing (non-criminal) for employers, parents or private individuals     For employee drug testing, adolescent (counseling) drug testing, child custody, and random call information......more..

Drug and Drug Testing Information  The detection times in urine are significantly greater than detection times in blood, which is also generally much more expensive. The presence of a drug or drugs in urine does not...  more...

DUI / DUID Case Reviews    DDL toxicologists can provide scientific evaluation of DUI involving alcohol and drugs, and in other criminal cases such as clandestine drug manufacture or drug facilitated sexual assaults.  Click here for more information.