Quiet hours in Fort Collins, CO — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Fort Collins residential noise limits per Sec. 20-23(a): 55 dBA from 7 AM to 8 PM, 50 dBA from 8 PM to 7 AM. Pure tones reduce limits by 5 dBA per Sec. 20-23(b). Measured at the receiving property line.
Fort Collins municipal code establishes quiet hours and residential noise limits. Colorado Revised Statutes §18-9-106 provides statewide enforcement for unreasonable noise as a Class 1 petty offense. Most Colorado cities set residential limits around 55 dBA daytime, 50 dBA nighttime at the property line. Exemptions for emergency vehicles and city operations. CDPHE handles industrial noise complaints at the state level.
First offense: warning or citation $150 to $500. Repeat violations may escalate. Class 1 petty offense under CRS §18-9-106: up to $500 fine.
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