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.
Washington's WAC 173-60-040 sets noise limits by receiving-property class. A residential (Class A) property may receive up to 60 dBA from an industrial (Class C) source, dropping 10 dBA (to 50 dBA) between 10 p.m. and 7 a.m. A commercial receiver may get 65 dBA and an industrial receiver 70 dBA from industrial sources. Clark County adopts these under CCC 9.14.010, where exceeding WAC 173-60 is prima facie evidence of a violation. Facility siting and land-use noise are also addressed in the Title 40 development code.
Exceeding WAC 173-60 industrial levels is prima facie proof of a CCC 9.14.010 misdemeanor ($250 / 90 days); Department of Ecology may separately enforce WAC 173-60.
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See how Clark County's industrial noise rules stack up against other locations.
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