In response to escalating threats to public health, first responders, and the environment, the Siskiyou County Board of Supervisors has unanimously declared a local emergency due to the pervasive use of illegal, foreign-labeled pesticide fumigants at illicit cannabis cultivation sites throughout the unincorporated areas of Siskiyou County. The resolution cites a disturbing rise in the use of highly toxic and unregistered pesticide products, most of which are labeled in Chinese and imported illegally. These substances, found routinely at illegal grow sites, include dangerous mixtures of insecticides (such as organophosphates, carbamates, pyrethroids, and chlorinated hydrocarbons), fungicides, and herbicides. Many of these chemicals are classified as carcinogens under California’s Proposition 65, toxic air contaminants, or groundwater pollutants.