This document provides an overview of clandestine methamphetamine drug labs, including: - Describing the prevalence of meth production and the likelihood that first responders will encounter illegal labs. - Recognizing chemical substances and hazards involved in meth production, and environmental and safety issues related to illegal labs. - Identifying common items used in meth production and general clues to the presence of illegal labs. - Explaining how meth is manufactured using the red phosphorus method and the dangers of hazardous chemicals, armed suspects, and booby traps at these labs.