Douglas County measures noise on the A-weighted scale, 25 feet or more from the source's lot line. Residential/agricultural limits are 55 dB(A) day and 50 dB(A) night, with a 10 dB allowance for brief periods and a 5 dB lower cap for shrill or impulsive noise.
Under Section 1705A, sound is measured on the 'A' weighting scale of a standard sound-level meter, 25 feet or more from the lot line of the noise source, when wind is under five mph (or ten mph with a windscreen). Section 1703A.01 lets daytime levels be exceeded by 10 dB(A) for up to fifteen minutes in any one-hour period, while Section 1703A.02 limits periodic, impulsive or shrill noises to 5 dB(A) below the table values. Ambient background noise is considered in every measurement.
Readings above the applicable dB(A) limit are a Zoning Resolution violation subject to county code-enforcement abatement and penalties.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Douglas County, CO
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See how Douglas County's decibel limits rules stack up against other locations.
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