CannabisLegalStatus&EmployerTestingRules
Where cannabis is legal, medical-only, decriminalized, or prohibited — plus the employer drug-testing rules, statute citations, and federal DOT carve-outs you need before you screen, hire, or discipline.
Explore Cannabis Legal Status & Employer Testing Rules by State
Filter by legal status, hover any state for a summary, and click for full statute citations, employee protections, and DOT carve-outs.
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DOT Testing & Cannabis: What State Legalization Does Not Change
State cannabis protections never apply to DOT-regulated safety-sensitive employees. Under 49 CFR Part 40, marijuana remains a federally prohibited Schedule I substance for every DOT testing program — regardless of how legal the state has made adult or medical use.
The Federal Floor
- 49 CFR Part 40 governs all DOT-regulated drug and alcohol testing. THC is on the mandatory 5-panel test.
- A DOT medical review officer (MRO) cannot verify a positive result as negative based on a state medical-marijuana recommendation.
- A positive DOT test removes the employee from safety-sensitive duty until they complete the return-to-duty process with a substance abuse professional.
- CBD use does not excuse a positive THC test. The DOT explicitly warns drivers that CBD products may contain enough THC to trigger a positive.
- State statutes legalizing cannabis (CA AB 2188, NY Labor Law § 201-d, NJ CREAMMA, etc.) all carry express DOT/federal carve-outs.
DOT-Regulated Roles & Agencies
- FMCSACDL drivers (interstate trucking, motorcoach)
- FAAPilots, flight attendants, aircraft maintenance
- FRALocomotive engineers and railroad workers
- FTAMass transit operators and mechanics
- PHMSAPipeline operations and inspection
- USCGMerchant marine and licensed mariners
Plus: federal contractors subject to the Drug-Free Workplace Act of 1988, and any private employer that adopts a Part 40-equivalent policy by contract.
Federal sources
This page summarizes publicly available state statutes, regulations, and agency guidance as of the date noted on each state. It is not legal advice. Verify with counsel before adopting or changing a workplace drug-testing policy.
Stay Ahead of Cannabis Workplace Rules in Every State
BlueHive helps employers manage compliant drug testing, DOT programs, and multi-state policy tracking from one platform — with provider locations in every state.