Minnesota cannabis testing requirements

Required tests

• Potency
• Pesticides
• Residual solvents
• Heavy metals
• Microbials
• Mycotoxins
• Water activity
• Foreign matter
• Homogeneity
• Other (see notes)

ISO/IEC 17025 accreditation

Required within a set period. 12 months. A lab can be licensed while its ISO/IEC 17025 accreditation is pending and operate for up to one year, with one possible six-month extension (Minn. Stat. 342.37, subd. 2a). Minn. R. 9810.3000 requires labs to obtain and keep the accreditation; loss of it means immediate revocation.

Notes

• Adult use is legal under Minn. Stat. 342.09. State-licensed dispensaries began opening in fall 2025; tribal dispensaries opened earlier.
• OCM also runs the medical cannabis patient registry (Minn. Stat. 342.52) and licenses lower-potency hemp edible makers, whose products face the same testing mandate (Minn. Stat. 342.61).
• Rules: Minn. R. 9810.3000 (testing facility standards) and 9810.3100 (product testing and sampling), published April 2025. OCM's Cannabis Technical Authority sets analytes and limits, and the rule requires OCM to publish updated testing thresholds each year by July 1 (9810.3100, subp. 6).
• Homogeneity (products with serving units) and stability (all products; 'other' here, sets the expiration date) are shown on the first batch of each process; until stability data exist, products carry a six-month expiration date. Products made from tested inputs may skip repeat contaminant tests.
• Microbials (flower): Salmonella, STEC, Aspergillus (4 species), Enterobacteriaceae, total aerobic count, yeast and mold; Listeria is added for concentrates and infused products. Mycotoxins: aflatoxins B1, B2, G1, G2 and ochratoxin A.
• Heavy metals: arsenic, cadmium, lead, mercury. Water activity: flower below 0.65, solid edibles below 0.85. Terpene testing only for products with added terpenes or a terpene label claim.
• Limits cited here are from Technical Authority v1.2 (Aug 21, 2025); OCM revises the standard yearly.
• Until May 31, 2027, hemp products without intoxicating cannabinoids may be tested by any ISO/IEC 17025 lab accredited for cannabis testing (2026 Minn. Laws ch. 40).