Decibel Limits: Chicago vs Des Plaines
How do decibel limits rules compare between Chicago, IL and Des Plaines, IL?
Chicago and Des Plaines have similar restriction levels.
Chicago, IL
Cook County
Cook County noise enforcement under Chapter 30, Article V uses a reasonableness standard. Illinois EPA Title 35, Part 901 sets statewide decibel limits: 61 dBA daytime and 51 dBA nighttime for residential areas (Class A land).
View full Chicago rules →Des Plaines, IL
Cook County
Des Plaines' noise ordinance under Title 6, Chapter 6 relies primarily on a plainly-audible and reasonableness standard rather than fixed dBA limits. Measured decibel enforcement between zoning districts follows Illinois Pollution Control Board rules (35 Ill. Adm. Code Parts 900–901).
View full Des Plaines rules →Key Facts Comparison
| Fact | Chicago | Des Plaines |
|---|---|---|
| Residential Day | 61 dBA (state) | - |
| Residential Night | 51 dBA (state) | - |
| County Standard | Reasonableness test | - |
| State Code | 35 IAC Part 901 | - |
| Local Standard | - | Plainly audible / reasonableness |
| IPCB Daytime Limit | - | 61 dBA (to residential) |
| IPCB Nighttime Limit | - | 55 dBA (to residential) |
| Vehicle Noise | - | 625 ILCS 5/12-602 |
| Fine Range | - | $75–$750 |
Highlighted rows indicate differences between cities.
Chicago FAQ
What are the decibel limits in Cook County?
Illinois EPA sets 61 dBA daytime and 51 dBA nighttime for residential areas statewide. Cook County's own Chapter 30 uses a reasonableness standard for enforcement.
How is noise measured for enforcement?
Measurements are taken at the property line of the receiving property. The state uses A-weighted decibel scale (dBA) as the standard measurement.
Des Plaines FAQ
Does Des Plaines have specific decibel limits?
Des Plaines' local ordinance uses a plainly-audible and reasonableness standard rather than fixed dBA limits. Measured enforcement follows IPCB rules: 55 dBA night and 61 dBA day at residential boundaries.
Do Des Plaines Police use sound meters?
Officers may use a calibrated sound-level meter for recurring industrial or commercial disputes, but most residential noise complaints are handled under the audibility standard.
What is the fine for exceeding noise limits in Des Plaines?
Local violations carry fines of $75 to $750 per occurrence. State IPCB violations face higher penalties enforced by the Illinois EPA.
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