Commercial noise in Spokane must comply with WAC 173-60 EDNA limits based on the receiving property class. Commercial-to-residential sound cannot exceed 60 dBA day or 50 dBA night at the residential property line.
Under WAC 173-60-040 adopted by Spokane, noise from commercial properties (Class B EDNA source) is limited to 60 dBA during daytime and 50 dBA at night when received on Class A (residential) property. Commercial-to-commercial is 60 dBA day and night. HVAC rooftop units, loading docks, dumpster pickup, and drive-through speakers are the most common complaint sources. Loading and unloading between 10 PM and 7 AM is restricted near residential zones. Grocery stores and restaurants that operate overnight may require sound attenuation for compressors and refrigeration units. Complaints can be filed with both the city and Ecology.
First violation typically warning or 250 dollars. Continued violations may result in business license review and require noise mitigation plans.
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See how Spokane's industrial noise rules stack up against other locations.
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