Montgomery County sets no countywide decibel limit. Dayton enforces measured caps: 61 dB(A) daytime and 55 dB(A) nighttime in residential districts, plus 80 dB(A) for motor vehicles, measured at the property line.
Whether your area uses a decibel meter or a 'plainly audible' standard depends on your city or township, not the county. Dayton is a decibel-based jurisdiction: stationary noise may not exceed 61 dB(A) from 7 a.m. to 10 p.m. or 55 dB(A) from 10 p.m. to 7 a.m. in residential, office-residential, and university districts, measured at the property line where the noise originates. Motor vehicles have a separate 80 dB(A) limit at 15 feet. Suburbs vary: some use decibel meters, others rely on nuisance or plainly-audible tests. Township trustees set residential-area rules under ORC 505.172.
In Dayton, exceeding the stationary decibel limits is declared a public nuisance and prosecuted as a fourth-degree misdemeanor (up to 30 days jail and a $250 fine).
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Dayton, OH
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