Oregon Recreational Boat Noise Limit: 90 dB at 50 Feet

Oregon law (ORS 830.235, OAR 250-010-0030) sets the maximum allowable sound level for recreational vessel exhaust at 90 decibels (dB) measured at 50 feet (15 meters) from the source.

Scope

• Applies to all motorized watercraft: powerboats, PWCs (jet skis), sailboats under power
• All Oregon waters: inland, coastal, Columbia River
• Enforced by: Marine Board, county sheriffs, State Police

Testing Protocol

• Stationary test: Engine at 3,000 RPM (or ¾ throttle) in neutral
• Meter: Type 2 sound level meter, A-weighting, fast response
• Conditions: Calm water, no wind, 50 ft abeam

Compliance

• Factory mufflers usually compliant
• Aftermarket "performance" exhausts often violate
• Modifications void compliance
• Fine: Up to $500 (Class D violation); possible impound

Why It Matters

• Noise pollution: wildlife disturbance, shoreline residents, other boaters
• Safety: masking horn, voice, distress signals
• Access: noise complaints drive ramp closures, restrictions

Keep stock muffler; maintain it. Respect the 90 dB limit—it's the law and good stewardship.