Colusa County, CA Noise Ordinances: Construction Hours (2026)

Under Section 13-8(b) of Chapter 13 (Noise Regulations, Ord. No. 730), construction, alteration, repair, or maintenance activities authorized by a valid county permit or business license, or private work not requiring a permit, are allowed between 7:00 a.m. and 7:00 p.m. on Mondays through Fridays, and between 8:00 a.m. and 8:00 p.m. on Saturdays and Sundays. To qualify, the work must meet at least one noise limit: no individual piece of equipment may exceed 83 dBA at 25 feet (or measured about 20 feet away if housed in a structure), or the noise at any point outside the project's property plane must not exceed 86 dBA. Impact tools and equipment (such as pavement breakers and jackhammers) are exempt from those dBA caps but must use manufacturer-recommended mufflers and acoustically attenuating shields approved by the director of public works. Section 13-8(b)(A) lets construction projects located more than 200 feet from existing homes apply for a special use permit to begin at 6:00 a.m. on weekdays from June 15 through September 1, but no percussion-type tools (ramsets, jackhammers) may run before 7 a.m., and the permit is revoked if the sheriff's department receives any noise complaint. These rules apply to unincorporated Colusa County.