The National Drug Threat Assessment provides a yearly assessment of the many challenges local communities face related to drug abuse and drug trafficking. Highlights in the report include usage and trafficking trends for drugs such as prescription drugs, heroin, methamphetamine, cocaine, marijuana, and the hundreds of synthetic drugs. The assessment factors in information from many data sources such as drug seizures, drug purity, laboratory analyses, information on the involvement of organized criminal groups, and survey data provided to DEA by 5,155 state and local law enforcement agencies across the country.