Frequently Requested Information

  • Search for a company or ID number using the Hazardous Waste Tracking System.
  • To apply for, reactivate, or inactivate a permanent California identification number, please visit our Hazardous Waste ID number page.
  • To obtain a temporary California identification number:  DTSC EPA-ID Issuance System 
  • To obtain a permanent U.S. EPA identification number, please visit our Hazardous Waste ID number page
  • For information about hazardous waste transportation, call (800) 618-6942.
  • Don't know who to call? Contact the Regulatory Assistance Officer Hotline at (800) 728-6942 or (800) 72TOXIC .