10 county-level rules, plus city-specific rules for 1 city in Clark County, Washington.
Verified from official government sources
Unincorporated Clark County has no single fixed "quiet hours," but yelling, shouting, whistling or singing near a street between 10 p.m. and 7 a.m. is a public disturbance noise, and state WAC 173-60 limits drop 10 dBA (to 45 dBA at residences) during those same hours.
WAC 173-60-040(2)(b)
Between the hours of 10:00 p.m. and 7:00 a.m. the noise limitations of the foregoing table shall be reduced by 10 dBA for receiving property within Class A EDNAs.
In unincorporated Clark County, using lawn mowers, chain saws and other repair or ground-maintenance power equipment is allowed 7:00 a.m. to 10:00 p.m.; outside those hours, frequent engine noise in a residential area is a public disturbance noise.
CCC 9.14.010(3)
this subsection shall not apply to the operation of lawn mowers, garden tools, chain saws or other power equipment used for building repair or ground maintenance between the hours of 7:00 a.m. and 10:00 p.m.
A dog that barks, bays, cries or howls continuously for 10 minutes, or intermittently for a half hour or more, to the disturbance of any person is a public disturbance noise in unincorporated Clark County, at any time of day or night.
CCC 9.14.010(1)
It shall be deemed a public disturbance noise under this subsection for a dog to bark, bay, cry, howl or make any other noise continuously and/or incessantly for a period of ten (10) minutes or bark intermittently for one-half (1/2) hour or more to the disturbance of any person at any time of day or night.
Clark County has no leaf-blower-specific ban. Leaf blowers fall under the ground-maintenance power-equipment exemption: allowed 7:00 a.m. to 10:00 p.m.; frequent use outside those hours in a residential area can be a public disturbance noise.
CCC 9.14.010(3)
this subsection shall not apply to the operation of lawn mowers, garden tools, chain saws or other power equipment used for building repair or ground maintenance between the hours of 7:00 a.m. and 10:00 p.m.
Using a musical instrument, sound amplifier or volume-controlled device that produces loud or raucous sound frequently, repetitively or continuously from a building or property, disturbing neighbors, is a public disturbance noise in unincorporated Clark County.
CCC 9.14.010(6)
The use of a musical instrument, sound amplifier, or other device incorporating electrical signal volume control that produces or reproduces loud and/or raucous sounds which emanate frequently, repetitively or continuously from any building, structure or property so as to unreasonably disturb or interfere with the peace, comfort or repose of owners or possessors of neighboring real property.
The county sets no aircraft-noise rule. Aircraft in flight are exempt from Washington's environmental noise limits and are regulated federally by the FAA. Clark County addresses airport compatibility through Title 40 land-use, not a decibel ordinance.
Industrial noise reaching a Clark County residence is capped by WAC 173-60-040 at 60 dBA (45 dBA drop does not apply to industrial-zone receivers, but residences get the 10 dBA night cut). Persistent industrial noise disturbing neighbors is also a public disturbance under CCC 9.14.010.
CCC 9.14.010
Where applicable, proof of violation of the noise level limitations set out in Chapter 173-60 WAC shall be prima facie evidence of a violation of this section.
Clark County applies Washington's WAC 173-60 environmental noise limits. At a residential (Class A) property the maximum is 55 dBA from another residence, 57 dBA from commercial, and 60 dBA from industrial sources, reduced 10 dBA (to 45 dBA) between 10 p.m. and 7 a.m.
WAC 173-60-040(2)(a)
5 dBA for a total of 15 minutes in any one-hour period; or 10 dBA for a total of 5 minutes in any one-hour period; or 15 dBA for a total of 1.5 minutes in any one-hour period.
Outdoor music, live bands and PA systems fall under Clark County's public disturbance noise rule: loud or raucous amplified sound from a property that frequently or continuously disturbs neighbors is prohibited, and all sound must stay within WAC 173-60 limits.
CCC 9.14.010(4)
The use of a sound amplifier or other device capable of producing or reproducing amplified sound upon public streets for the purpose of commercial advertising or sales or for attracting the attention of the public to any vehicle, structure, or property or the contents therein between the hours of 8:00 p.m. of one day and 7:00 a.m. of the next day, except for emergency vehicles.
Frequent horn honking, and frequent engine noise from starting, operating, repairing or testing motor vehicles in a residential area that disturbs neighbors, are public disturbance noises in unincorporated Clark County. Amplified car stereos audible 50 feet away are also prohibited.
CCC 9.14.010(2)
The frequent, repetitive or continuous sounding of any horn or siren attached to a motor vehicle, except as a warning of danger or as specifically permitted or required by law.
1 cities in Clark County have their own noise ordinances rules. Each link goes to that city's dedicated page with code citations.
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