Vermont cannabis testing requirements

Required tests

• Potency
• Terpenes
• Pesticides
• Residual solvents
• Heavy metals
• Microbials
• Mycotoxins
• Water activity
• Homogeneity

Notes

• Rules: Board Rule 2, 2.9 (testing), Rule 1, 1.8 (lab licensing) and Rule 3, 3.7.1 (medical products), effective July 15, 2025.
• Analytes and action limits are set in Board guidance (Laboratory Testing Action Limits, July 2026); guidance changes need 90 days' public notice unless urgent (Rule 2.9.1).
• Testing must be done by an independent licensed lab the licensee does not own or control (7 V.S.A. 908(f)).
• Smokeable flower: potency, pathogens, pesticides (up to five cultivars may be composited) and water activity of 0.65 or less; soil heavy metals every three years.
• Solvent-extracted concentrates: potency, heavy metals, pesticides and residual solvents. Mechanically extracted concentrates: potency and pathogens.
• Edibles: potency and beginning-middle-end homogeneity testing; topicals: potency.
• Pathogens: STEC, Salmonella and Aspergillus flavus, fumigatus, niger and terreus, none detected.
• Metals: arsenic, cadmium, lead and mercury in product; chromium, copper, nickel and zinc limits apply to soil.
• Pesticides: 15 listed analytes.
• Terpenes: required for inhaled concentrates and rosin, products with added or reintroduced terpenes, and labels that state terpene content.
• Mycotoxins (aflatoxins B1, B2, G1, G2 and ochratoxin A): only for Aspergillus-positive flower extracted with solvent for vape products.
• Potency caps: flower 30% THC, solid concentrates 60% THC. Delta-8 and delta-10 THC at 3% or more marks a product adulterated (adopted June 2026).
• Unknown: whether the required lab accreditation must be ISO/IEC 17025; the rules do not name a standard.