10 rules for unincorporated Davis County, Utah.
Verified from official government sources
Davis County sets no countywide quiet-hours law; each city does. In Bountiful, loading, construction, power equipment and garbage collection are unlawful between 11:00 p.m. and 6:00 a.m. In Layton, sound devices may not be plainly audible at your property line from 9 p.m. to 7 a.m.
Bountiful City Code 8-7-102
The following acts are unlawful between the hours of 11:00 p.m. and 6:00 a.m.: (a) Loading Operations... (b) Construction Work... (c) Commercial Power Equipment... in excess of five horsepower. (d) Garbage Collection.
Davis County sets no countywide construction-hour rule; cities do. Bountiful City Code 8-7-102 makes operating construction, repair, alteration or demolition equipment unlawful between 11:00 p.m. and 6:00 a.m. Other Davis County cities set similar overnight limits, so confirm your city's code and any permit conditions.
Bountiful City Code 8-7-102(b)
The following acts are unlawful between the hours of 11:00 p.m. and 6:00 a.m.: ... (b) Construction Work. Operating, or causing to be operated, any equipment used in construction, repair, alteration or demolition work on buildings, structures or streets.
Davis County Code 6.16.010 makes a barking dog a nuisance at any time of day or night. The threshold is incessant barking for 30 minutes or more, or intermittent barking for 60 minutes or more, in any 24-hour period. Davis County Animal Care & Control enforces it countywide.
Davis County Code 6.16.010
Such extended period of time shall consist of incessant barking for thirty (30) minutes or more in any twenty four (24) hour period or intermittent barking for sixty (60) minutes or more during any twenty four (24) hour period.
No Davis County city bans leaf blowers outright or sets a special decibel limit for them. In Bountiful, operating power equipment over five horsepower is unlawful between 11:00 p.m. and 6:00 a.m.; most homeowner blowers fall under 5 hp but still must not create an unreasonably loud disturbance.
Bountiful City Code 8-7-102(c)
(c) Commercial Power Equipment. Operating, or permitting to be operated, any power equipment, in excess of five horsepower.
Bountiful City Code 5-6-102 makes it unlawful to operate any sound amplifier outdoors, or indoors to reach people outdoors, without a current amplified sound license. Layton bars sound devices plainly audible at the property line from 9 p.m. to 7 a.m. The county sets no general rule.
Bountiful City Code 5-6-102
It is unlawful for any person, firm, association or corporation to use or operate, or permit to be used or operated out of doors, or indoors when used or operated to reach persons out of doors, any sound amplifier as defined in this chapter in any part of the City without a current amplified sound license from the City.
Aircraft noise, including from Hill Air Force Base near Layton, Clearfield and Roy, is regulated by the federal government, not Davis County. The FAA and the military control flight operations and airspace, so cities and the county cannot set aircraft noise limits. Concerns go to Hill AFB's community noise program.
Davis County sets no countywide industrial-noise decibel limit; cities regulate it plus zoning. Bountiful City Code 8-7-102 makes operating commercial power equipment over five horsepower unlawful between 11:00 p.m. and 6:00 a.m., and 8-7-101 bans unreasonably loud noise disturbing residents at any time.
Bountiful City Code 8-7-101(a)
It is unlawful to: (a) intentionally disturb the quiet, comfort or repose of any person in his dwelling by making unreasonably loud noises, which under the circumstances would disturb a person of average and reasonable sensitivities.
Davis County has no residential decibel table; most noise is judged by an 'unreasonably loud' or 'plainly audible' standard. The main numeric limits are Bountiful's vehicle caps: 88 dB(A) for vehicles over 10,000 lbs and 80 dB(A) for lighter vehicles, measured 25 feet away.
Bountiful City Code 13-1-117(c)
Any motor vehicle with a manufacture GVWR rating of 10,000 lbs or more, shall not emit a sound pressure level to exceed 88dB(A)... Any motor vehicle with a manufacture GVWR rating of 10,000 lbs or less, shall not emit a sound pressure level to exceed 80dB(A), when the emitted sound is measured by a sound level meter at a distance of 25 feet (7.5m).
For outdoor music, Bountiful City Code 5-6-102 requires an amplified sound license for any sound amplifier used out of doors, or indoors when it reaches people outdoors. After 11:00 p.m. general noise limits apply, and Layton caps sound plainly audible at the property line after 9 p.m.
Bountiful City Code 5-6-102
It is unlawful for any person, firm, association or corporation to use or operate, or permit to be used or operated out of doors, or indoors when used or operated to reach persons out of doors, any sound amplifier as defined in this chapter in any part of the City without a current amplified sound license from the City.
Bountiful City Code 13-1-117 caps motor-vehicle noise: 80 dB(A) for vehicles rated 10,000 lbs or less and 88 dB(A) for those over 10,000 lbs, measured 25 feet away. Every vehicle must keep a working muffler. Layton also targets booming car stereos plainly audible 50 feet away.
Bountiful City Code 13-1-117(c)
Any motor vehicle with a manufacture GVWR rating of 10,000 lbs or less, shall not emit a sound pressure level to exceed 80dB(A), when the emitted sound is measured by a sound level meter at a distance of 25 feet (7.5m) from the near side of the nearest land being monitored.
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