The short answer: Marijuana is still prohibited for DOT safety-sensitive employees in every state. A verified positive THC result is a DOT violation even if your use was legal, off duty, or with a medical card, and it requires the SAP return-to-duty process.
Why state law doesn’t apply
Recreational or medical marijuana may be legal where you live, including New York, New Jersey and Massachusetts. DOT drug testing follows federal rules, and marijuana remains prohibited under them, so a verified positive is a violation no matter what your state allows.
Does federal rescheduling change DOT testing?
Not right now. Federal efforts to move marijuana to Schedule III are still in progress. DOT has said:
- its drug testing rules will not change until rescheduling is complete
- safety-sensitive employees are still tested for marijuana
- its medical marijuana, recreational marijuana and CBD guidance remains in effect
Until DOT announces a change, nothing changes for you. We’ll update this page if DOT does. (Last checked November 2026.)
Medical marijuana cards
A Medical Review Officer (MRO) can’t accept a state medical marijuana card or recommendation as a legitimate medical explanation. The result is still reported as positive. If you take any prescribed medication, tell the MRO when they call; only the MRO decides whether there’s a legitimate medical explanation.
Need a DOT SAP evaluation?
Talk with a DOT-qualified SAP by secure live video in New York, New Jersey, Georgia and Massachusetts. Appointments are generally available within 24–48 hours once payment and required paperwork are complete, subject to availability.
CBD, THCA, delta-8 and other hemp products
- CBD products aren’t closely regulated and can contain more THC than the label says. DOT doesn’t accept CBD use as an excuse for a positive.
- THCA flower becomes THC when it’s heated or smoked.
- Delta-8 and other “hemp-derived” THC products can also cause a positive.
“It was legal hemp” doesn’t change a DOT result. If you’re in a safety-sensitive job, the safest choice is to avoid these products.
How long does THC stay in your system?
There’s no safe window. THC can be detectable for days after occasional use and for weeks after frequent use, depending on how much and how often you used, your body and the product. “I used two weeks ago” doesn’t make a positive any less of a violation.
Think it’s a false positive?
Every non-negative result is reviewed by the MRO before your employer hears about it. You also have 72 hours from the MRO’s notification to ask for your split specimen to be tested at a different lab. How to challenge a failed DOT test →
What happens after a positive THC test
- You’re removed from safety-sensitive duty.
- You complete a SAP evaluation and the recommended education or treatment.
- You complete a follow-up evaluation with the same SAP.
- You pass a directly observed return-to-duty test.
- You complete follow-up testing: at least six tests in your first year, and possibly more for up to five years.
CDL drivers also get a prohibited Clearinghouse status and face a possible CDL downgrade. Clearinghouse II and CDL downgrades →
Frequently asked questions
I used marijuana days ago, off duty. Does that matter?
DOT testing doesn’t distinguish on-duty from off-duty use. A verified positive is a violation.
Does a medical marijuana card protect me on a DOT test?
No. The MRO can’t accept it as a legitimate medical explanation.
Can THCA or delta-8 make you fail a DOT drug test?
Yes. Both can produce a THC positive, and “legal hemp” isn’t accepted as an explanation.
Is marijuana still on DOT drug tests after rescheduling?
Yes. As of November 2026, DOT says testing continues unchanged until rescheduling is complete.
Will the SAP judge me for legal use?
No. The SAP’s job is a clinical assessment, not a moral judgment.
Can I keep using it after I return?
Follow-up tests are unannounced and directly observed. Any future positive is a new violation, and the process starts again.
Get past a THC positive the right way.
Your first inquiry is free. Virtual DOT SAP evaluations throughout New York State, plus New Jersey, Georgia and Massachusetts. Appointments are generally available within 24–48 hours once payment and required paperwork are complete, subject to availability.
