Noise Ordinances in Weld County, CO (2026)
7 county-level rules, plus city-specific rules for 1 city in Weld County, Colorado.
Verified from official government sources
Quiet Hours
In unincorporated Weld County, residential noise may not exceed 50 dB(A) from 9 p.m. to 7 a.m. (55 dB(A) by day). In Greeley, sound-reproduction devices plainly audible at a property line between 10 p.m. and 7 a.m. are unlawful.
Weld County Nighttime Noise Limits (9 p.m.-7 a.m.)
Some RestrictionsWeld County Code Sec. 14-9-40(C)
Between the hours of 9:00 p.m. and 7:00 a.m., the noise levels set forth above may be exceeded by up to ten (10) decibels for up to fifteen (15) minutes in a one-hour period. D. Vehicles operating in the public right-of-way are subject to the following maximum noise levels: Vehicle Class (GVWR) Maximum Noise in Speed Limit 35 m.p.h. or less zone Maximum Noise in Speed Limit over 35 m.p.h. ...
Construction Hours
Weld County's noise ordinance sets no construction hours. It exempts noise produced at a construction site and allows construction and industrial noise up to 80 dB(A). Greeley addresses construction noise only through its general nuisance-noise rule.
No County Construction-Hour Curfew in Weld County
Some RestrictionsWeld County Code Sec. 14-9-60(N)
The provisions of this Article shall not apply to: ... N. Any noise produced at a construction site.
Barking Dogs
Weld County's noise ordinance does not cover barking. Sec. 14-9-60(E) exempts sounds made by dogs and farm animals. Persistent barking is handled as an animal nuisance through animal control, not by the decibel limits.
Barking Dogs Exempt From County Noise Limits
Some RestrictionsWeld County Code Sec. 14-9-60(E)
The provisions of this Article shall not apply to: A. Any noise resulting from any authorized emergency vehicle responding to an emergency call or acting in time of emergency. B. The sound made by any burglar, fire, personal safety or other warning device. C. Any noise made during the operation of aircraft or other activities which are preempted by federal law, with respect to noise contr...
Leaf Blower Rules
Weld County does not restrict leaf blowers. Sec. 14-9-60(J) exempts the sound made by a lawnmower, snow blower or other power or hand tool. No county time-of-day or decibel cap applies to yard equipment.
Leaf Blowers Exempt From Weld County Noise Rules
Some RestrictionsWeld County Code Sec. 14-9-60(J)
The provisions of this Article shall not apply to: ... J. The sound made by a lawnmower, snow blower or other power or hand tool.
Aircraft Noise
Weld County's noise ordinance does not regulate aircraft. Sec. 14-9-60(C) exempts noise from operating aircraft and other federally preempted activities. Aircraft and crop-duster noise is controlled by the FAA, not the county or Greeley.
Aircraft Noise Is Federally Preempted
Some RestrictionsWeld County Code Sec. 14-9-60(C)
The provisions of this Article shall not apply to: A. Any noise resulting from any authorized emergency vehicle responding to an emergency call or acting in time of emergency. B. The sound made by any burglar, fire, personal safety or other warning device. C. Any noise made during the operation of aircraft or other activities which are preempted by federal law, with respect to noise contr...
Decibel Limits
Weld County caps ambient sound at 55 dB(A) in residential and commercial areas and 80 dB(A) in industrial areas and construction sites during the day, dropping five decibels at night. County Code § 14-9-40 sets the numeric ceiling by land use and time, measured under § 14-9-50, with oil and gas operations exempt under § 14-9-60(L).
Weld County Noise Limits by Zone and Time of Day
Some RestrictionsWeld County Code § 14-9-40(A)-(B)
A.Sound levels shall be measured as provided for in Section 14-9-50 below.B.Sound levels are hereby established for each type of property during specific hours of the day. Any sound level which exceeds the level set for a type of property at any time of day is prohibited. Land Use Maximum Noise (dB(A)) 7:00 a.m. — 9:00 p.m. Maximum Noise (dB(A)) 9:00 p.m. — 7:00 a.m. Residential Property or...
Vehicle Noise
Weld County caps vehicle noise on public roads at 80 dB(A) for cars and light trucks in 35-mph zones (84 dB(A) faster) and 86-90 dB(A) for rigs over 10,000 pounds GVWR. County Code § 14-9-40.D-E also bans cutout, bypass or missing mufflers anywhere in the unincorporated county.
Weld County Vehicle Noise and Muffler Limits
Some RestrictionsWeld County Code § 14-9-40(D)-(E)
D.Vehicles operating in the public right-of-way are subject to the following maximum noise levels: Vehicle Class (GVWR) Maximum Noise in Speed Limit 35 m.p.h. or less zone Maximum Noise in Speed Limit over 35 m.p.h. zone Manufacturer's gross vehicle weight rating (MGWR) over 10,000 pounds (4,536 kg), or any combination of vehicles towed by such motor vehicle 86 90 Any other motor vehicle or any...
Noise Ordinances by City in Weld County
1 cities in Weld County have their own noise ordinances rules. Each link goes to that city's dedicated page with code citations.
All Weld County ordinances
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