Quiet hours in Idaho Falls, ID — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Idaho Falls has no single blanket 'quiet hours' window. Instead, City Code 5-4-11 declares plainly audible disturbing noise a nuisance day or night, and sets specific overnight cutoffs: music between 12:00 am and 8:00 am, manufacturing and residential construction between 12:00 am and 5:30 am.
The City of Idaho Falls regulates noise through City Code Title 5, Chapter 4, Section 5-4-11 (Nuisance Noise), adopted by Ordinance 3536 on September 14, 2023. Rather than one universal curfew, the code combines a general 24-hour nuisance standard with targeted nighttime restrictions. Under 5-4-11(C)(1), no person may make any loud, repetitive, or high-pitched noise, or amplified or reproduced sound including recorded music, that is plainly audible at 50 feet from the source at any time. Layered on top of that are nighttime cutoffs: 5-4-11(C)(2) prohibits plainly audible music between 12:00 am and 8:00 am, and 5-4-11(C)(3) and (C)(6) bar plainly audible manufacturing noise and residential-zone construction noise between 12:00 am and 5:30 am. 'Plainly audible' is defined in 5-4-11(B) as sound detectable by a person using unaided hearing from 50 feet; for music, an audible rhythmic bass component alone qualifies. Violations are infractions under 5-4-11(F), with a fine set by Council resolution; a third violation within one calendar year is a misdemeanor. There is no numeric decibel limit in the code.
Reported to the Idaho Falls Police Department via non-emergency dispatch. A first or second offense is an infraction punishable by a fine set by Council resolution; a person found guilty twice within one calendar year is guilty of a misdemeanor on the next violation (5-4-11(F)).
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