In Tulsa County, Okla., police have identified 979 contaminated meth lab sites — the most of any county in the nation.
Source: Drug Enforcement Administration's National Clandestine Laboratory Register 2004-2012.
The DEA's meth lab register lists locations that were reported to be clandestine drug laboratories based on reports by local law enforcement agencies. The labs stay on the site until local authorities contact the DEA and inform them it has been decontaminated or demolished.