Noise from Specific Sources in Aurora, CO

Aurora maintains 156 local ordinances across all categories, and 3 of those deal specifically with noise from specific sources. Here is a breakdown of what the city actually requires, what is prohibited, and where Aurora falls on the strict-to-permissive spectrum compared to other cities.

Bar & Nightclub Noise

Aurora caps loudspeaker and amplified music from bars and nightclubs by decibel and bans PA/loudspeaker use near homes from 10 p.m. to 7 a.m. under the citywide UDO noise standard.

Key details: Residential boundary limit: 55 dBA day / 45 dBA night. Commercial/mixed-use limit: 60 dBA day / 55 dBA night. PA/loudspeaker curfew: banned 10pm-7am near homes. Governing instrument: UDO Art. 146-4, current Feb. 23, 2026. Also applies: City Code § 94-107, cumulative.

Sound measured over the Table 4.11-1 limit for the adjacent zone, or any loudspeaker/PA use between 10 p.m.-7 a.m. disturbing a residential lot line without a temporary permit; also enforceable as unreasonably loud noise under City Code § 94-107.

Generator Noise

Aurora has no generator-specific noise rule. Generator and other equipment noise is measured against the UDO's citywide decibel limits: 55 dBA daytime and 45 dBA nighttime at a neighboring residential property line.

Key details: Residential daytime limit: 55 dBA, 7am-9pm. Residential nighttime limit: 45 dBA, 9pm-7am. Measured at: neighboring property boundary. Oil/gas emergency generators: excluded from power mandate. UDO currency: through Ord. 2026-03, Feb 2026.

Aurora's Neighborhood Services Department enforces UDO noise violations; each day a generator exceeds the property-line decibel limit is a separate offense, punishable under City Code § 1-9 by a fine up to $2,650, up to 364 days in jail, or both.

Delivery Truck Noise

Aurora caps diesel truck idling at 15 minutes per hour citywide and sets decibel limits by adjacent zone, covering delivery truck noise at loading docks.

Key details: Idling limit: 15 min per hour, citywide. Residential noise cap: 55 dBA day / 45 dBA night. Commercial noise cap: 60 dBA day / 55 dBA night. Sleeper-cab exemption: 1/4 mile from residential. Governs: Aurora, Colorado only.

City enforcement (Neighborhood Services/code enforcement) can cite excess idling or a sound-level exceedance as a municipal violation under UDO § 146-4.11.2.E; fines follow the general UDO enforcement and penalty provisions.

The Bottom Line

Aurora's noise from specific sources rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Aurora is broadly strict or permissive.

This guide is based on Aurora's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.