Kent County sets no industrial-noise limit; your city or township does through zoning. In Grand Rapids' light-industrial districts, sound at the boundary of a residence, business, or commercial district may not exceed the ordinance's octave-band decibel limits.
Michigan cities and townships regulate industrial noise through zoning-based performance standards, not the county. Grand Rapids Sec. 9.63(11) states that in I-1 Light Industrial and Planned Industrial Districts, at no point on the boundary of a residence, business, or commercial district shall the sound-pressure level of any operation exceed the listed octave-band decibel limits, with 55 dB(A) residential and 62 dB(A) business-commercial monitoring values and a 7 dB nighttime reduction. Sec. 9.63(12) applies a separate table to I-2 Heavy Industrial districts, measured at the greater of the residential boundary or 125 feet from the plant. Verify the standard for your municipality.
Exceeding the Grand Rapids industrial limits is a Chapter 151 municipal civil infraction; the ordinance treats any level above the monitoring dB(A) values as a violation. Enforcement and fines are city-set and differ across Kent County jurisdictions.
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Side-by-side rule comparisons with other cities in Kent County.
See how Grand Rapids's industrial noise rules stack up against other locations.
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