Guide
DOT vs Non-DOT Drug Testing
Employers often ask whether they must follow federal DOT drug testing rules or can set their own program. This guide explains the difference and where rapid on-site drug tests fit.
Who needs DOT drug testing
DOT testing applies to safety-sensitive employees in industries regulated by the U.S. Department of Transportation, including trucking and commercial driving (FMCSA), aviation (FAA), rail (FRA), transit (FTA), pipeline (PHMSA) and maritime (USCG). These programs follow the procedures in 49 CFR Part 40.
How DOT testing works
DOT tests use a federal custody and control form, a trained collector, a federally certified laboratory, and a Medical Review Officer (MRO) who reviews results. The drug panel is set by federal rule, so employers cannot add or remove drug classes on a DOT test.
How non-DOT testing works
Every other workplace drug test is non-DOT. The employer writes the policy, chooses the panel, and decides when to test: pre-employment, random, post-incident, reasonable suspicion or return-to-duty. Many employers use rapid urine cups, dip cards or oral fluid tests on site, with non-negative results sent to a lab for confirmation.
Running both programs
Companies with both DOT and non-DOT employees usually keep two separate programs. DOT employees follow federal procedures, while office, warehouse and other staff can be screened with rapid tests under company policy. Always check your state laws, especially on cannabis, before setting a non-DOT policy.
Frequently asked questions
What is a DOT drug test?
A DOT drug test is required by the U.S. Department of Transportation for safety-sensitive transportation workers, such as commercial drivers, pilots, and railroad and pipeline workers. It follows the federal procedures in 49 CFR Part 40, uses a federal custody and control form, and is tested at a federally certified laboratory.
What is a non-DOT drug test?
A non-DOT drug test is any workplace drug test that is not required by federal transportation rules. The employer sets the policy, chooses the panel, and can use on-site rapid tests, as long as the program follows applicable state laws.
Can I use rapid drug test cups for DOT testing?
No. DOT-regulated tests must be collected and sent to a federally certified laboratory. Rapid on-site cups and dip cards are used for non-DOT programs such as pre-employment, random, and post-incident screening set by company policy.
Which drugs does a DOT test screen for?
The DOT panel covers marijuana, cocaine, amphetamines (including methamphetamine and MDMA), opioids (including codeine, morphine, heroin, hydrocodone, hydromorphone, oxycodone and oxymorphone), and PCP.
Can a non-DOT test screen for more drugs?
Yes. Non-DOT employers often use expanded panels, such as 10, 12 or 14 panels, to add benzodiazepines, barbiturates, methadone, buprenorphine, fentanyl and other classes.