McHenry County's own ordinance uses a 100-foot audibility test, not decibels. Numeric limits come from Illinois: 35 Ill. Adm. Code 901 sets octave-band sound-pressure caps for property-line noise reaching homes, roughly 63 dB at 250 Hz daytime and lower at night.
The county nuisance ordinance deliberately avoids decibel meters, using a distance-and-disturbance test instead. Enforceable numeric limits are set statewide by the Illinois Pollution Control Board under 35 Ill. Adm. Code 901. For sound reaching Class A land (residential), daytime octave-band limits range from 72 dB at 31.5 Hz down to 32 dB at 8000 Hz; nighttime (10:00 p.m.–7:00 a.m.) limits are stricter, e.g. 55 dB at 125 Hz and 40 dB at 500 Hz. Measurements are taken at least 25 feet from the noise source. These state limits mainly apply to commercial and industrial property-line sources.
State property-line-noise violations are enforced by the Illinois Pollution Control Board and IEPA; county nuisance fines run $100 to $1,000 per offense.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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Crystal Lake collects yard waste and food-scrap compost weekly at the curb from April 1 through November 30. Leaves and grass must go in biodegradable paper ...
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Crystal Lake and McHenry County have no ordinance specifically banning or approving residential artificial turf. Installations must still meet Unified Develo...
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Illinois' Homeowners' Native Landscaping Act bars community associations from banning native-species plantings that are kept free of weeds and don't encroach...
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Neither Crystal Lake nor McHenry County prohibits residential rain barrels or rainwater collection, and Illinois has no statewide ban. The McHenry County Sto...
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Crystal Lake uses a color-coded water-conservation system. During a declared 'Yellow' condition, odd-numbered addresses water on odd dates and even addresses...
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Crystal Lake Chapter 526 lists noxious weeds - burdock, ragweed, thistle, poison ivy, wild mustard and others - plus any unmanaged vegetation as nuisance gre...
See how McHenry County's decibel limits rules stack up against other locations.
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