There is no county outdoor-music ordinance. Outdoor and backyard music must stay within Colorado's residential noise limits (CRS 25-12-103): 55 dB(A) daytime / 50 dB(A) night, measured 25 feet beyond the property line.
Outdoor live or recorded music at a home in the unincorporated county is regulated only by the state decibel caps, not by a county permit or curfew. Above 55 dB(A) daytime or 50 dB(A) after 7pm at the 25-foot measuring point, the music is prima facie evidence of a public nuisance. Non-profit and government-sponsored outdoor cultural and entertainment events (festivals, concerts) are statutorily exempt from these limits. Incorporated cities within Adams County may impose their own outdoor-event or amplified-sound permits.
Outdoor music above the residential caps is prima facie evidence of a public nuisance under CRS 25-12-103; enforced by the Sheriff.
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