Marijuana Program Testing Lab Information

The Department of Public Health and Human Services’ state environmental laboratory along with the Department of Revenue’s Cannabis Control Division provide dual oversight of marijuana testing laboratories in Montana. The state environmental laboratory is responsible for inspections, endorsements, and suspension of marijuana testing laboratories per the Montana Marijuana Regulation and Taxation Act.

Required Contaminate Testing

Montana testing requirements can be found at  ARM 37.107.316

  • cannabinoid profile/potency
  • percent moisture
  • filth and foreign matter
  • pesticides
  • residual solvents
  • microbiological
  • mycotoxins

General Testing Laboratory Endorsement Requirements

  • Certificates of insurance and bonding
  • Business license
  • Property Owner Permission Form for Laboratories if applicable
  • DOR issued employee badge
  • Laboratory security/storage plan
  • Quality assurance plan
  • Standard operating procedures (SOPs)
  • Validation studies
  • Proficiency data/results
  • Scientific director resume, transcripts, and references
  • ISO17025:2017 accreditation
  • Successful state laboratory inspection

The state laboratory must be notified when:

  • Adulterated marijuana is suspected by laboratory samplers.
  • A licensee wishes to change laboratories for re-testing or remediating testing.
  • Changes in the scientific director listed on the endorsement.


An annual laboratory license fee of $5,000 shall be submitted with the licensure application to the Department of Revenue’s Cannabis Control Division prior to license expiration. 

Forms and Resources


Please contact the Marijuana Laboratory Systems Improvement Specialist with questions concerning testing laboratories.  All other inquires please refer to the Department of Revenue’s Cannabis Control Division website.

Phone: (406) 444-1548