Quality Assurance

Importance of Cannabis Testing

According to a recently released report by cannabis testing company Steep Hill, up to 84.3% of marijuana being sold at dispensaries in California may be tainted with pesticides.

65% of the samples in the report tested positive for high levels of Myclobutanil, a pesticide typically used on California grapes, almonds and strawberries. But when Myclobutanil is heated up, it converts to hydrogen cyanide, a toxic chemical listed as a Schedule 3 substance under the Chemical Weapons Convention. (via Extract)

A pesticide like this can be very harmful if smoked by patients, especially those with weak immune systems.


BPG has the Cleanest Cannabis in the Country

We stress the importance of obtaining your medicine from a dispensary you trust. At Berkeley Patients Group, it is our guarantee that every single product is lab-tested to ensure that it is absolutely safe for consumption by our patients.

In fact, you could say that we have the cleanest cannabis in the country, given that Berkeley's cannabis testing and labeling standards are the most stringent in America today.

BPG's testing is performed by an independent cannabis analytics laboratory in compliance with Berkeley Municipal Code § 12.27.070. We independently verify any laboratory results provided by our vendors.



Medicine that fails any tests for contamination is not offered to our patients. Each medicine is tested for:

  • Pesticides. A combination of enzyme-linked immuno assays and gas chromatography is used to test for pesticide residue including organophospate and carbamate pesticides, pyrethroid pesticides, and avermectins (Avid).
  • Microbial contaminants. An aerobic plate count (APC) methodology is used to test for microbial contamination including bacteria, fungus, and mold. Polymerase chain reaction (PCR) is used to identify specific contaminants like e. coli.
  • Residual flammable solvents. Headspace analysis is used to test for the presence of residual solvents in all applicable products (i.e. extracts).



Potency refers to the quantity of each active ingredient in a particular medical cannabis product. Active ingredients include any cannabinoid or propyl cannabinoid derivative when present in amounts greater than 0.5% by dry weight, and any mono-or sesquiterpenoid present in amounts greater than 0.3% by dry weight. We test for the following key compounds:

  • Delta-9-tetrahydrocannabinolic Acid (THCA)
  • Delta-9-tetrahydrocannabinol (THC)
  • Cannabidiolic acid (CBDA)
  • Cannabidiol (CBD)
  • Cannabinol (CBN)

These compounds are quantitated using liquid chromatography and/or gas chromatography with derivatization. BPG maintains records of all medicine by batch, including the corresponding laboratory test result data for each batch, in compliance with Berkeley Municipal Code § 12.27.050(B)(2).


Return Policy

As of April 1, 2018, all returns and exchanges will require proof of purchase, including cartridges. Management reserves the right to decline a return for any reason.


Additional Information

To learn more about lab-tested medical cannabis at BPG, please visit our dispensary and ask one of our trained specialists or e-mail us at info@myBPG.com.