10 rules for unincorporated St. Clair County, Illinois.
Verified from official government sources
Unincorporated St. Clair County sets no fixed clock quiet hours. Nighttime noise is handled through the county nuisance/zoning code and Illinois disorderly-conduct law. Belleville, O'Fallon and other cities set their own night rules, so check your municipality.
35 Ill. Adm. Code 901.105
Nighttime hours means the 8 hours between 10:00 p.m. and 7:00 a.m. that are not part of the 16 continuous daytime hours.
Unincorporated St. Clair County's Zoning Ordinance sets no specific construction-hour window; loud work is limited only as a nuisance beyond the property line. Cities such as Belleville and O'Fallon set their own construction-hour limits, so verify with your municipality.
St. Clair County Zoning Ordinance Sec. 40-8-2
No use of land, building or structure shall be permitted which creates a nuisance or detrimental or hazardous condition.
A habitually barking, howling or whining dog is a nuisance under the Illinois Animal Control Act, enforced by St. Clair County Animal Services. There is no county decibel meter; complaints are handled as a disturbance of the neighborhood's peace.
St. Clair County has no ordinance specifically limiting leaf blowers. Their noise is governed only as a general nuisance and by the Illinois Pollution Control Board's sound limits. Some cities set hours for power yard equipment, so check your municipality.
Unincorporated St. Clair County has no decibel cap on amplified music; loud stereos or bands are cited under Illinois disorderly-conduct law and the county nuisance code. Cities such as Belleville set their own amplified-sound limits and permits.
Aircraft noise is regulated by the FAA, not St. Clair County. The county cannot set flight or engine noise limits; the Illinois Pollution Control Board's noise rules expressly exclude aircraft in flight, so complaints go to the airport or FAA.
Industrial and commercial noise in St. Clair County is regulated mainly by the Illinois Pollution Control Board's property-line sound limits and the county Zoning Ordinance's nuisance provisions barring disturbances beyond the property line.
St. Clair County Zoning Ordinance Sec. 40-8-2
No use of land, building or structure shall be permitted which creates a nuisance or detrimental or hazardous condition.
St. Clair County sets no local decibel ordinance. Measurable noise is judged against the Illinois Pollution Control Board's octave-band sound limits (35 Ill. Adm. Code 901), which are lower at night between 10:00 p.m. and 7:00 a.m.
35 Ill. Adm. Code 901.102(b)
No person shall cause or allow the emission of sound during nighttime hours from any property-line noise source located on any Class A, B or C land to any receiving Class A land that exceeds any allowable octave band sound pressure level specified in the following table.
Unincorporated St. Clair County has no dedicated outdoor-music ordinance. Live or amplified outdoor sound is handled through the county nuisance code and Illinois disorderly-conduct law. Cities often require event permits and set sound limits.
St. Clair County Zoning Ordinance Sec. 40-2-2
Creation or maintenance of any unreasonably distracting or objectionable vibration and/or electrical disturbances discernible at or beyond the property line of the premises on which the aforesaid vibration or electrical disturbance is created or maintained.
Illinois law requires every vehicle to have a working muffler that prevents excessive or unusual noise and bans exhaust cutouts and loud modifications, enforced statewide including throughout St. Clair County by the sheriff and local police.
625 ILCS 5/12-602
Every motor vehicle driven or operated upon the highways of this State shall at all times be equipped with an adequate muffler or exhaust system in constant operation and properly maintained to prevent any excessive or unusual noise.
See every category we cover for St. Clair County — parking, noise, fences, fires, animals, pools, and more.
St. Clair County Ordinance Hub →