Noise from Specific Sources in Boise, ID

If you live in Boise or are thinking about moving there, noise from specific sources are one of those things you probably won't think about until they affect you directly. Boise has 2 specific rules on the books covering different aspects of noise from specific sources, and some of them might surprise you.

Low-Frequency Bass Limits

Boise bans amplified sound, including bass-heavy car audio systems, that is plainly audible fifty feet or more from a vehicle on a public street, under Boise City Code section 6-16-2. The same section separately bars unreasonable engine revving audible at that distance. A violation is an infraction under section 6-16-4, with no jury trial available for the citation.

Key details: Governing section: Boise City Code § 6-16-2. Audibility threshold: 50 feet from the vehicle. Classification: infraction under § 6-16-4. Trial type: bench trial only, no jury. Adopted/amended: Ord. 25-17 (2017); Ord. 13-23 (2023).

Playing car audio, including bass-heavy subwoofers, loud enough to be plainly audible fifty feet from the vehicle on a public street is an infraction under section 6-16-4, as is unnecessary engine revving audible at that distance under section 6-16-2(B). Contested citations go to a bench trial only; section 6-16-4 expressly removes the right to a jury trial for a vehicle-noise infraction, though court costs and fees are excluded from the base penalty.

Car Alarm Limits

Boise's vehicle amplified sound law doesn't reach car alarms: Boise City Code section 6-16-3 specifically exempts vehicular burglar alarms and emergency alarms from the fifty-foot noise prohibition in section 6-16-2 whenever the alarm is requesting assistance or warning of a hazard. An alarm that keeps blaring for another reason isn't covered by the carve-out.

Key details: Governing section: Boise City Code § 6-16-3. Exempted from: § 6-16-2 fifty-foot noise ban. Scope of exemption: alarms requesting help or warning of hazard. Other exemptions: emergency vehicles, safety devices, ads, permits. Adopted/amended: Ord. 25-17 (2017); Ord. 13-23 (2023).

There's no violation for a car alarm sounding to summon help or flag a hazard: section 6-16-3(C) removes it from the infraction created by section 6-16-2. But the exemption is narrow. Once an alarm's purpose isn't to request assistance or warn of hazardous situations, the underlying fifty-foot amplified-sound prohibition and the infraction penalty in section 6-16-4 can still apply.

The rules around car alarm limits in Boise lean permissive, but that does not mean anything goes.

The Bottom Line

Boise's noise from specific sources rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Boise is broadly strict or permissive.

All of the above reflects Boise's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.