Since testing regulations went into full swing there on July 1, labs have examined almost 11,000 batches of products ranging from buds to oils and edibles.
Close to 20 percent of marijuana products in California have failed to pass tests for potency or purity since the state began mandating such testing July 1, a new report finds. About 2,000 products failed the tests.
Now some of these failed tests are a simple case of mislabeling, meaning a company labeled a product as having a potency different than what was actually tested. A total of 1,904 batches failed the tests.
Critics are simultaneously describing the state's testing requirements as too rigid, too lenient and overly costly.
Only a small number have been withheld from sale due to safety hazards such as unacceptable levels of bacteria, solvents or pesticides, according to the California Bureau of Cannabis Control.
Some lab officials say a large number of potentially harmful species of mold and yeast can go undetected in pot products because they are not now covered in state guidelines. The chief scientific officer for Santa Ana-based testing company Cannalysis, Swetha Kaul, told regulators last month that the testing rules miss mold and yeast contaminants that standard pharmaceutical and food testing would otherwise catch.
As California has rolled out its recreational marijuana program this year, concerns have lingered that much of the state's cannabis business remains in the black market.
"Mandatory statewide testing is a new thing and it's going to take some time for everything to run smoothly, but on the whole we're pleased with how things are progressing", said Bureau of Cannabis Control spokesman Alex Traverso.