Reactivating an ID Number

How do I reactivate my existing ID number?

Permanent ID numbers become inactive for multiple reasons. The most common reason is failure to respond to the ID number verification questionnaire by the deadline in the notice that is sent to all handlers. Additionally, some companies choose to inactivate their number and later need to reactivate it. It is a simple process to reactivate a number.

If you did not respond to the 2017 ID number verification questionnaire, and need to reactivate your CA or federal ID number, please click here. If you have a federal EPA ID number, please also register at this link and update your information in the EPA database, RCRAInfo. Alternatively, you may send the Form 8700-12 to DTSC.

NOTE: Temporary numbers CANNOT be reactivated.  You may only have one temporary ID number at your site.  If you need another number after your temporary ID number expires, you must apply for a permanent ID number and inactivate it when you no longer need it.

Please choose which type of number you have:

I have a State ID Number I have an EPA ID Number

If you have a state ID number and did not respond to a 2016 or prior year verification questionnaire, select the green button (I have a state ID number).

If you have a federal EPA ID number and did not respond to a 2016 or prior year verification questionnaire, please select the blue button (I have an EPA ID number).

I don't know what type of ID number I have.

The first two or three characters in your ID number determine the type of ID number you have:

  • Federal EPA ID number: CAR, CA, CAD, CAT, CAP
  • State ID number: CAL, CAC, CAD, CAH, CAI, CAE, CAF, CAS, CLU, CAX, CA99

For a more detailed discussion of these prefixes and their meaning, please refer to our fact sheet, EPA Identification Numbers for Generators.


I still have questions. Who can I talk to?

Please call our ID number help line at 800-618-6942 for other questions.