Microbial Panel
Also known as: Microbial Contaminants Test, Microbiological Testing
A microbial panel is the section of a certificate of analysis (COA) that tests a hemp product for living contaminants, usually yeast and mold, E. coli and Salmonella, and often the toxins molds leave behind, called mycotoxins (aflatoxins and ochratoxin A).
Each line on the panel is a contaminant the lab looked for. Yeast and mold are reported as a count, in colony forming units per gram (CFU/g). E. coli and Salmonella are usually pass/fail: not detected in one gram. Aflatoxins are reported by weight, in micrograms per kilogram. Kentucky's rule for hemp products (902 KAR 45:031, checked October 2026) is a good example of the standard: ingestible products pass when total combined yeast and mold stay at or under 100,000 CFU/g, Salmonella is not detected in one gram, Shiga toxin-producing E. coli is not detected in one gram, and total aflatoxins B1, B2, G1 and G2 stay at or under 20 micrograms per kilogram. Other states set their own numbers, so the limit printed on the report matters as much as the result.
Flower carries more mold risk than oil. Flower is raw plant material that is grown, dried and stored, and damp or poorly dried plant is where mold takes hold. Oil is a refined extract in a carrier, with far less water for microbes to live in. That is our reasoning, not a promise, and lower risk is not no risk, which is why regulators such as Kentucky still require microbial and mycotoxin testing on finished hemp products, batch by batch. Culture-based tests can also miss some mold species, so a clean panel is good evidence rather than proof.
What a pass looks like: every line marked ND (not detected), or a count under the stated limit, with a pass/fail column, the batch number, the lab's name, and its ISO 17025 accreditation. Match the batch number on the bottle to the batch number on the report. If a brand shows only a cannabinoid chart and no microbial section, that report is not a full panel. We test every batch through a third-party lab, and you can pull ours at /coas.
Related terms
- COA (Certificate of Analysis)A COA is a document from an accredited third-party lab certifying what is — and isn't — in a CBD product.
- Third-Party TestingThird-party testing means a CBD product was analyzed by an independent, accredited lab — not by the manufacturer themselves.
- ISO 17025ISO 17025 is the international quality standard for testing and calibration laboratories. CBD COAs should come from labs accredited under this standard.
- Batch NumberA batch number identifies a specific production run of a CBD product. Batch numbers let you match a bottle to its specific COA.
- Hemp FlowerHemp flower is the smokable bud of hemp varieties bred for high CBD and low THC content.