An investigation by The Times, in conjunction with cannabis industry newsletter WeedWeek, found alarming levels of pesticides in cannabis products available on dispensary shelves across the state, including some of the most popular brands of vapes and pre-rolled weed.
Twenty-five of 42 legal cannabis products that The Times and WeedWeek purchased from retail stores and had tested at private labs showed concentrations of pesticides either above levels the state allows or at levels that exceed federal standards for tobacco. The contaminants include chemicals tied to cancer, liver failure, thyroid disease and genetic and neurologic harm to users and unborn children. Most of the pesticides found were in low concentrations that risk long-term harm by repeated use, though the extent of the health threat may not be known for years.
Vapes tested from five well-known brands had pesticide loads that exceeded federal Environmental Protection Agency risk thresholds for harm from a single exposure, The Times and WeedWeek found. Users might experience irritation to the lungs, eyes and throat as well as rash, headache, diarrhea and abdominal pain.
The findings dovetail with scores of complaints that two private cannabis testing labs have filed over the last eight months, reporting pesticides in products certified by other labs as safe. The results, the labs said, suggest some level of contamination in more than 250,000 vapes and pre-rolled joints on store shelves, about the number sold legally in California in a two-day period.
A pink acai vape from Stiiizy, the state’s top-selling cannabis brand, carried more than 60 times the maximum amount of pymetrozine allowed by federal regulators in cigarettes. But because California does not require testing for pymetrozine, the company that makes Stiiizy products said it is not in violation of state regulation.
