Industrial and commercial noise in unincorporated Solano County is controlled through the zoning ordinance (Chapter 28, Art. III), which requires all land uses to prevent offensive noise and specifically noise exceeding 65 dBA at any property line. Confined-animal, agricultural-processing, and similar facilities must take adequate measures to control noise so as not to constitute a nuisance. Sec. 21-10 adds an overnight 65 dBA disturbance rule.
Solano County regulates industrial, manufacturing, processing, and agricultural-operation noise primarily through the performance standards in its zoning ordinance (Chapter 28, Article III). Those standards require that all uses of land and structures be conducted in a manner, with adequate controls and operational management, to prevent offensive noise, dust, glare, vibration, or odor, and specifically to prevent noise that exceeds 65 dBA at any property line. Additional use-specific conditions require facilities such as confined animal facilities, agricultural processing facilities, livestock auction yards, public stables, and similar operations to take adequate measures to control odor, dust, noise, and waste disposal so as not to constitute a nuisance, often with minimum setbacks to reduce noise impacts. No land or building may be used so as to create dangerous or objectionable noise or vibration that adversely affects the surrounding area or adjoining premises. The overnight rule in Solano County Code Sec. 21-10 (65 dBA at the property line after 10:00 p.m. or before 6:00 a.m.) applies to non-agricultural facility noise as well. New industrial development is also reviewed against the noise criteria in the General Plan Health and Safety Element.
Noise exceeding the 65 dBA zoning performance standard makes the use a public nuisance subject to abatement under Chapter 10, with administrative penalties for ordinary violations of $100 first, $200 second within a year, and $500 third and subsequent (Sec. 10-24). Overnight breaches of Sec. 21-10 are misdemeanors (up to six months jail and/or $1,000 under Sec. 1-21). Permit conditions may be revoked for chronic violations.
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