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Ukiah Field Office

Off Highway Vehicle Noise Regulations

New California OHV Noise Regulations.

On January 1, 2003, California's Off-Highway Vehicle noise regulations changed.  Help protect your sport by meeting the new off-highway vehicle noise standards.  Agencies will be conducting sound tests on public lands where OHV's are used.

California OHV Noise and Red Sticker Regulations

The education and warning phase of enforcement has ended. Officers began issuing citations for violations of California's OHV noise regulations and red sticker riding seasons on July 15, 2003.  

Help protect your sport by complying with all OHV regulations. 
The off-highway vehicle noise emission standard is now 96 dBA on 1986 and newer models. Models 1985 and older must comply with 101 dBA. The testing standard is J1267 developed by the Society of Automotive Engineers.
Red sticker vehicles may be operated on public lands during seasons established by the California Air Resources Board. All model year 2002 or older OHV's are being issued green stickers by the DMV. Green sticker vehicles are not subject to the restricted riding seasons.
For more information, visit the California State Park Off Highway Motor Vehicle Recreation Division web site at or call 916-324-4442 and ask for an information packet.
If your off-highway vehicle was manufactured:
Noise limit is:
Before January 1, 1986
101 dbA
On or after January 1, 1986
96 dbA
If your competition* off-highway vehicle was manufactured:
Noise limit is:
Before January 1, 1998
101 dbA
On or after January 1, 1998
96 dbA

*Competition off-highway vehicles are those that are not manufactured to comply with EPA noise or California emission standards. For information on the designation of your OHV, refer to your owner's manual or contact your local dealership.