Close to half of Maine’s medical cannabis may contain pesticides, mold, officials say

Steph Sherer, founder of medical cannabis advocacy group Americans for Safe Access, stressed during the panel Tuesday that contaminants are often an innocent mistake.
“It doesn’t mean that there’s someone who has some evil plan to contaminate patients,” she said.
Cannabis is a bioaccumulator, meaning it will suck up and hold onto any pesticides and heavy metals in the soil. Plus, because of the resin on the flower, it’s easy for the plant to pick up bacteria in the air, she said.