National Testing Services Contact

Drug testing in Wisconsin

State laws, marijuana laws, and employer compliance

Recreational marijuana: IllegalMedical marijuana: LimitedDOT rules apply nationwide
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For employers

Wisconsin drug testing laws

Governing law

Wisconsin drug testing laws and federal DOT regulations

What you can do

Employer rights

  • Pre-employment testing is permitted
  • Reasonable suspicion testing is lawful
  • Post-accident testing is permitted
  • Random testing may be allowed under employer policy
  • Return-to-duty and follow-up testing are permitted
  • Employers may prohibit workplace drug use and impairment
  • Employers may discipline employees who violate workplace drug policies
What you must do

Compliance requirements

  • Maintain written drug testing policies
  • Apply testing procedures consistently and fairly
  • Use certified laboratories
  • Clearly communicate testing procedures and consequences
  • Train supervisors to recognize impairment indicators
  • Follow applicable federal DOT regulations when required

Cannabis

Wisconsin marijuana laws

Recreational · Illegal

Recreational use

  • Recreational marijuana is not legalized and remains illegal under Wisconsin law
Medical · Limited

Medical use

  • Limited allowances exist for certain low-THC CBD products under restricted circumstances
At work

Workplace impact

  • Employers may enforce zero-tolerance drug policies
  • Employers may prohibit marijuana use entirely
  • Employers may discipline employees for positive marijuana tests
  • Safety-sensitive and federally regulated positions remain subject to strict federal requirements
  • DOT-regulated employers must continue following federal drug testing laws

Best practices

Staying compliant in Wisconsin

Develop detailed written drug-free workplace policies
Clearly define workplace impairment standards
Train supervisors to recognize impairment indicators
Stay updated on Wisconsin drug law developments
Use certified providers
Apply testing procedures consistently and fairly

Our services

Testing services in Wisconsin

NTS provides accurate, confidential, and legally defensible testing through our nationwide collection network.

Urine drug testingHair follicle testingOral fluid (saliva) testingNail drug testingDOT drug and alcohol testingCourt-ordered testingRandom and pre-employment screening

Sources & legal references

  1. Wisconsin Department of Workforce Development
  2. Wisconsin Legislature
  3. Wisconsin Department of Health Services
  4. U.S. DOT Drug & Alcohol Testing Regulations
  5. NCSL Marijuana Laws by State

Laws change often. This page is general information, not legal advice. Check official state agencies or consult legal counsel for current requirements.

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Testing employees in Wisconsin?

Call the office to set up a compliant program, or schedule onsite collections.

Office601-602-2445 Onsite601-633-7733
Visit1520 Adeline St, Ste. 20, Hattiesburg, MS 39401