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Oregon DEQ sets the sound levels for ATVs which is based on each type of vehicle. Sound is measured at 20 inches from the tip of the muffler at a specific RPM for each individual vehicle. Most ATV Law Enforcement Officers throughout the State of Oregon have been issued a sound meter and are trained to conduct sound testing.
Excessively loud ATVs threatens trail access everywhere. Most ATVs equipped with a stocker muffler comply with sound limits. Some ATVs and motorcycles are designed for closed course completion and may not meet the Oregon sound limits. Most local shops can help you find a muffler that will bring your vehicle into compliance.
The Oregon Dunes National Recreation Area (ODNRA) and Sand Lake Recreation Area is managed by the US Forest Service, and has current sound limits from 93 to 97 dBA depending on location.
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