Outdoor music in unincorporated Solano County is limited by Solano County Code Sec. 21-10 (overnight non-agricultural noise above 65 dBA at the property line is a disturbance of the peace) and, for permitted special events, wineries, and agritourism, by the zoning ordinance (Chapter 28, Art. III), which caps outdoor amplified sound at 65 dB at the property lines and requires events to end by 10:00 p.m.
Solano County has no dedicated outdoor-music ordinance. Casual outdoor music at homes is governed by the general noise rule in Solano County Code Sec. 21-10: non-agricultural noise exceeding 65 dBA at the property line after 10:00 p.m. or before 6:00 a.m. is a per se disturbance of the peace, and music that maliciously disturbs neighbors at any hour can be cited under Sec. 21-10 or California Penal Code Sec. 415. For commercial and event-based outdoor music, the county zoning ordinance (Chapter 28, Article III) is more specific: at special-events facilities, outdoor amplified sound shall not exceed 65 dB measured at the property lines; at agritourism uses, outdoor amplified sound may only occur where an acoustical analysis demonstrates event noise will not exceed 65 dB at the property lines. Those uses carry hours-of-operation conditions, with events generally starting no sooner than 10:00 a.m. and ending by 10:00 p.m., and setup/cleanup allowed within a wider 8:00 a.m. to 11:00 p.m. window. Vacation house rentals may have no outdoor amplified sound and may not host events. Festivals and concerts inside incorporated cities are permitted by those cities.
Outdoor music violating Sec. 21-10 is a misdemeanor disturbance of the peace (up to six months jail and/or $1,000 under Sec. 1-21). Exceeding the 65 dB outdoor-amplified limit on a permitted event or agritourism site, or running music past the permitted end time, breaches zoning conditions and triggers event-permit penalties of $150/$700/$2,500 under Sec. 10-24, plus possible abatement under Chapter 10.
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