Can my employer drug test me in Missouri?
1. Federal Framework
Drug-Free Workplace Act for federal contractors over $100,000. DOT regulations (49 C.F.R. Part 40) for transportation. Federal aviation, nuclear, pipeline, MSHA rules.
2. State Drug-Testing Statute
Missouri has no comprehensive testing statute. Mo. Const. art. XIV (Amendment 3, effective Dec. 8, 2022) legalized recreational marijuana and provides employment protections. Medical Marijuana Amendment (Mo. Const. art. XIV § 1, 2018) protects qualifying patients. Public-sector testing limited by Mo. Const. art. I, § 15 (privacy).
3. Test Categories
All categories permitted: pre-employment, random, reasonable suspicion, post-accident, return-to-duty—subject to Amendment 3 limits for cannabis.
4. Required Procedures
No statutory procedure for private employers. Best practice: written policy, SAMHSA-certified lab, MRO review, GC/MS confirmation. Public-sector employees have additional constitutional protections.
5. Marijuana Considerations
Mo. Const. art. XIV § 2.7(20) prohibits employers from penalizing employees solely for status as a qualifying medical patient, except where employer would lose federal monetary or licensing benefit. § 2.7(21) limits employer ability to discipline for off-duty recreational use absent: (a) on-premises possession/use/impairment, (b) safety-sensitive position, (c) federal-law-required testing. Active impairment at work remains grounds for discipline.
6. Safety-Sensitive Carve-Outs
DOT-covered positions per 49 C.F.R. Part 40. Amendment 3 preserves safety-sensitive position discipline. Healthcare workers handling controlled substances, peace officers, firefighters.
7. ADA / Disability
Current illegal drug use not protected under Mo. Human Rights Act (R.S.Mo. § 213.010) or ADA. Recovering addicts in treatment protected. Qualifying medical cannabis patients protected via Amendment 3.
8. Remedies for Improper Test
Amendment 3 violations: civil action for damages, attorney fees per implementing regulations. Wrongful discharge in violation of public policy (Boyle/Fleshner). Defamation, invasion of privacy, breach of contract possible.
This is legal information, not legal advice.
- Terminated for off-duty cannabis use without safety-sensitive or federal-law basis
- Qualifying medical cannabis patient discriminated against without federal-funding nexus
- Random test imposed in non-safety-sensitive position without written policy
- Mo. Const. art. XIV
- R.S.Mo. § 213.010
- Mo. Const. art. I, § 15
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.