Naperville, IL Noise from Specific Sources: Generator Noise (2026)
Key Facts
- Generators
- exempt from noise decibel limits
- Also exempt
- valves, warning devices, railroads
- Governing chapter
- Title 6, Chapter 14
- Standard limits
- 55-80 dBA by land use
Summary
Naperville's noise code exempts emergency generators from its decibel limits, along with valves, warning devices, and other emergency equipment.
Valves, warning devices, aircraft and railroads, emergency generators, snowplowing, mosquito abatement, and emergency equipment/vehicles used only during times of emergency.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 101).
Full Breakdown
The City's performance standards chapter sets exterior noise decibel limits by land use and time of day, but Section 6-14-4 lists exemptions from those limits. Emergency generators are named alongside valves, warning devices, aircraft, railroads, snowplowing, mosquito abatement, and emergency equipment or vehicles used only during emergencies. That means a standby or portable generator running during a power outage is not measured against the chapter's residential, commercial, or industrial decibel caps.
Violations & Fines
Because emergency generators are listed as exempt, there is no separate decibel violation for generator noise under this chapter; other performance-standard violations remain enforceable by the City.
Frequently Asked Questions
Is a backup generator exempt from Naperville's noise limits?
What decibel limits would apply if generators weren't exempt?
Sources & Official References
Other rules in Naperville
Compare Naperville to another location·View the Illinois noise from specific sources overview
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