The University of Arizona

Clandestine Labs and Forms of Methamphetamine
Clandestine Drug Labs:
Signs of Clandestine Labs

The National Drug Intelligence Center has noted that the following factors often accompany clandestine labs [1]:

  • Unusual odors
  • Excessive amounts of trash, especially chemical containers, coffee filters, pieces of cloth stained red, and duct tape rolls
  • Curtains always drawn or windows covered with aluminum foil or blackened on residences, garages, and sheds
  • Evidence of chemical waste or dumping
  • Frequent visitors, especially at unusual times
  • Extensive security measures or attempts to ensure privacy
  • Secretive or unfriendly occupants



  • (1) National Drug Intelligence Center. Methamphetamine Laboratory Identification and Hazards. Johnstown, PA: NDIC; 2007.