Quiet Hours: Not specified as a general, universal range; specific activities have designated hours.
Residential Decibel Limit: Not specified (plainly audible at 100 feet is the standard) (Day) / Not specified (plainly audible at 100 feet is the standard) (Night)
Summary: Springfield, IL noise ordinances, primarily Chapter 259, prohibit unreasonable noise plainly audible at 100 feet, or 50 feet for amplified sound. Specific restrictions apply to construction (7 AM-7 PM weekdays) and domestic power tools (7 AM-9 PM weekdays; 9 AM-9:30 PM weekends/holidays). Animal disturbances lasting over 15 minutes are also prohibited. Violations incur fines from $100 to $500.