Portable Equipment Registration Program (PERP)

The Portable Equipment Registration ProgramLink to external website. (PERP) is a statewide program created by the California Air Resources Board (CARB) to register portable equipment as an alternative to securing permits from local air quality control districts.   PERP registered equipment may operate throughout the state without obtaining permits to operate from any of California's 35 air quality management or air pollution control districts.

Generally portable engines over 50 hp and portable equipment units that emit particulate matter cannot be operated within the jurisdiction of the South Coast Air Quality Management District (AQMD) without either an AQMD Permit to Operate, or PERP Registration. In some cases, portable equipment may be ineligible for PERP registration, leaving the AQMD permit as the only option.

Whether registered under PERP or permitted by AQMD, the responsibility for inspection of portable equipment and enforcement of applicable clean air requirements resides with AQMD. 

AQMD Permit or PERP?

The most significant difference is that PERP allows the freedom to operate portable engines and portable equipment units anywhere in the state without the need to obtain separate permits from each air quality district.  Highlights of each program are summarized in the table below. 

  AQMD Permit  PERP Registration 
Renewal Cycle  Annual  Triennial 
Fees  Higher  Lower 
Jurisdiction  Limited to AQMD (PDF) State of California 
Residence Time  > 12 months  < 12 months 
Conditions  Set by AQMD  Set by CARB 
Enforcement Agency  AQMD  AQMD 
Inspection Frequency  Yearly unannounced  Arranged every 3 years 

For more information about the PERP Program, contact CARB at 916-324-5869 or visit their websiteLink to external website..

NOTICE:  Effective immediately, the California ARB will no longer accept PERP applications and renewal invoice payments via fax due to security issues with credit card numbers transmitted by this method.  Please mail them directly to the address listed on the application form and renewal invoice.