Cannabis Ruderalis

Cannabis product testing is product testing of the properties of cannabis destined for consumer use. Analytical chemistry and microbiology laboratories determine cannabinoids, water content, heavy metals, pesticides,[1] terpenes, yeast, mold and mycotoxins, and solvents.[2][3] These laboratories came about when advocates of cannabis testing brought up concerns with potential contaminants.[4][5][6]



In 2015, the first government standards for testing were proposed in Colorado's legislature, when potency and microbial testing became mandatory in the state.[7][8][9] Colorado cannabis testing laboratories, such as AgriScience Labs, are regulated by the Colorado Department of Revenue's Marijuana Enforcement Division and the Colorado Department of Public Health and Environment.[10] Over the next several years, other tests became mandatory, such as residual solvent analysis and pesticides.[10][11]

Other states[edit]

Cannabis testing is also required in other states, such as California,[12] Oregon,[13] Massachusetts,[14] and Nevada.[15] Washington State added routine pesticide testing and random or investigation-driven heavy metal testing, formerly required only for medical cannabis, to its testing suite for all cannabis on March 2, 2022.[16]


Calls have been made to unify cannabis industry standards with existing testing organizations such as ASTM International (ASTM D37)[17] or International Standards Organization (ISO/IEC 17025).[18]


  1. ^ CEM, C. (2018). "Extraction of Pesticides from Cannabis" (PDF). AP0168: 1–5.
  2. ^ Small 2016.
  3. ^ St. Louis 2018, p. 384.
  4. ^ Matt Ferner (December 4, 2013), "Marijuana Can Be Covered In Mold, E.Coli, Insect Parts And Pollutants", Huffington Post
  5. ^ Joel Grover and Matthew Glasser (February 22, 2017), Pesticides and Pot: What's California Smoking? An NBC4 I-Team investigation found evidence suggesting that pesticides could be present in a lot of marijuana legally sold in California, Los Angeles: KNBC-TV News{{citation}}: CS1 maint: uses authors parameter (link)
  6. ^ Ben Parker Karris (June 22, 2016), "Unknown Unknowns: Why Cannabis Needs Standardized Lab Testing Now – From fentanyl-laced weed to pesticide-polluted flower, the importance of accuracy in lab test results cannot be overstated", Kindland, Kind
  7. ^ Kristen Wyatt (March 26, 2015), "Colorado bill seeks to standardize marijuana lab testing", The Cannabist, The Denver Post
  8. ^ Jennifer Kovalesk (15 June 2017). "Medical marijuana testing: 5 things you need to know". The Denver Channel. Retrieved 2018-11-15.
  9. ^ Lisa Rough (May 10, 2017), Leafly's State-by-State Guide to Cannabis Testing Regulations, Leafly, retrieved 2017-06-26
  10. ^ a b Colorado Department of Public Health and Environment (14 October 2014). "Inspection of marijuana testing facilities". Retrieved 2018-11-15.
  11. ^ Melissa Schiller. "Pesticide Testing is Mandatory in Colorado Starting Aug. 1: Are You Ready?". Cannabis Business Times. Retrieved 2018-11-15.
  12. ^ Michael R. Blood. "California testing of cannabis products off to rough start with high failure rate". Portland Press Herald. Retrieved 2018-11-15.
  13. ^ Oregon Health Authority. "Marijuana Testing Requirements". Retrieved 2018-11-15.
  14. ^ "Medical Use of Marijuana Program product testing". Retrieved 2019-07-07.
  15. ^ Colton Lochhead (24 January 2018). "Nevada officials cracking down on marijuana testing labs". Lad Vegas Review. Retrieved 2018-11-15.
  16. ^ Board Adopts Pesticide Testing Rules (press release), Washington State Liquor and Cannabis Board, March 2, 2022
  17. ^ "Standards development", Patient Focused Certification (website), Americans for Safe Access, retrieved 2017-04-27
  18. ^ "Washington Could Have the Safest Pot in the World If It Just Made This Simple Change", The Stranger, May 31, 2017


See also[edit]

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