Can an Illinois municipality allow louder industrial noise than state rules?

No. The Environmental Protection Act sets a floor; cities may impose stricter local limits but cannot authorize emissions exceeding IPCB octave-band standards at residential or commercial property lines.

How do I file an industrial noise complaint in Illinois?

Submit a complaint to the Illinois EPA Bureau of Air, which investigates noise under 35 IAC 900. Citizens may also file enforcement petitions directly with the Pollution Control Board under 415 ILCS 5/31.

Illinois Industrial Noise Law: Statewide Noise Ordinances Rules (2026)

Key Facts

Statute: 415 ILCS 5/24
Rules: 35 Ill. Adm. Code 900-901
Regulator: Illinois Pollution Control Board
Max penalty: $50,000 plus $10,000/day
Land classes: Class A, B, and C

Full Breakdown

The Illinois Environmental Protection Act (415 ILCS 5/24 and 5/25) prohibits emission of noise beyond the boundary of a person's property that unreasonably interferes with life or property. The Illinois Pollution Control Board (IPCB) implements this through 35 Ill. Adm. Code Parts 900 and 901, which set octave-band sound pressure limits at receiving Class A (residential), B (commercial), and C (industrial) land. Daytime limits at residential property lines roughly correspond to 55-61 dBA and nighttime limits to 47-51 dBA depending on frequency. These statewide standards apply regardless of municipal noise ordinances, which can supplement but not authorize emissions the state prohibits.

Violations & Penalties

Violations may result in IPCB enforcement actions, civil penalties up to $50,000 per violation plus $10,000 per day of continued violation under 415 ILCS 5/42, and injunctive relief sought by the Illinois Attorney General.

Illinois Industrial Noise Limits Set by Pollution Control Board

Key Facts

Full Breakdown

Violations & Penalties

Frequently Asked Questions

Sources

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