Madera County Code Chapter 9.58 applies to all land uses, including industrial and commercial activity, and prohibits disturbing, excessive or offensive noise and over-threshold vibration at the property line. There is no separate industrial dBA table; the right-to-farm designation is weighed for agricultural sources.
Industrial and commercial noise in unincorporated Madera County is governed by the same general ordinance as residential noise. Section 9.58.012 (Applicability of noise ordinances to all land uses) states that the noise standards 'shall, unless otherwise specifically indicated, apply to all such property within a designated zone,' confirming the chapter reaches industrial sites. The core prohibition in Section 9.58.020(A) bars 'disturbing, excessive or offensive noise,' and Section 9.58.020(D) lists factors used to judge a violation, including whether the noise is produced by 'agricultural, commercial or noncommercial activity' and expressly notes that 'the county of Madera is a right-to-farm county.' Industrial vibration is specifically limited: Section 9.58.020(F) prohibits operating any device that creates vibration above the perception threshold (about 0.1 inches per second, 1-100 Hz per Section 9.58.011) 'at or beyond the property boundary of the source if on private property or one hundred fifty feet (forty-six meters) from the source if on a public right-of-way.' The County does not publish numeric industrial dBA limits in Chapter 9.58; instead, larger industrial uses are typically conditioned through Madera County's zoning and use-permit process (Title 18), which can impose project-specific noise mitigation. Agricultural operations receive added protection under the County's Right to Farm chapter (Chapter 6.28).
Industrial noise that is disturbing, excessive or offensive, or vibration exceeding the property-line threshold, is a misdemeanor and public nuisance under Section 9.58.040 and may also be enjoined by the superior court. Administrative penalties run up to $500, then $750, then $1,000 for repeat violations within one year, each day a separate offense.
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