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Portable Equipment Registration Program (PERP)

The Portable Equipment Registration Program (PERP) is a statewide program created by the California Air Resources Board (CARB) to register portable equipment as an alternative to securing a permit from one of the 35 local air quality control or management districts. CARB administers the PERP program and the Sac Metro Air District enforces the requirements of the program.  Go to CARB's PERP website or see links below for complete program information including applications, fees and other requirements.


PERP registered equipment may operate under specific conditions throughout the state without obtaining a stationary source permit to operate, as long as they are not considered to be part of a stationary source.  For more information about what is considered a stationary source please reference this document Explanation & Examples of Uses of PERP or contact the Sac Metro Air District.

Generally, portable engines over 50 hp and portable equipment units that emit particulate matter greater than 2.0 pounds per day cannot be operated within the jurisdiction of the Sac Metro Air District without either a permit to operate or PERP registration. In some cases, portable equipment may be ineligible for PERP registration and a permit to operate is the only option for the legal use of the equipment in Sacramento County.

​PERP Inspections and Notifications


If your equipment is home-districted in Sacramento County you are required to contact Sac Metro Air District to arrange for an inspection within 45 days after the date of the initial issuance or renewal of a PERP registration.


If a registered equipment unit will be at a location within Sacramento County for more than 5 days notification to Sac Metro Air District is required within 2 days of commencing operations.

Inspection requests and notifications can be made in the following ways:

  1. Call (916) 874-4800 to schedule the inspection

  2. E-mail

  3. Request an inspection using CARB's online notification site



Regional Compliance Agreement for Tier 0 Compliance Agreement for Tier 0Recordkeeping Forms
Portable Equipment Recordkeeping form Equipment Recordkeeping formRecordkeeping Forms
19-04 Portable Engine ATCM Deadlines 19-04 Portable Engine ATCM Deadlines.pdf19-04 Portable Engine ATCM DeadlinesAdvisories
16-1 PERP upcoming amendments 16-1 PERP Upcoming Amendments.pdf16-1 PERP upcoming amendmentsAdvisories
15-01 PERP Equipment and Engines 15-01 PERP equipment.pdf15-01 PERP Equipment and EnginesAdvisories

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