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Ventura County, CA Data Centers & Crypto Mining: Data Center Noise Limits (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified July 2026

Key Facts

Daytime Limit
55 dBA Leq (6am-7pm)
Evening Limit
50 dBA Leq (7pm-10pm)
Nighttime Limit
45 dBA Leq (10pm-6am)
Alternative
Ambient plus 3 dBA if higher
Governing Policy
General Plan HAZ-9.2.4

Summary

Ventura County caps stationary-source noise at a noise-sensitive use at 55 dBA Leq daytime, 50 dBA evening, and 45 dBA at night, or ambient plus 3 dBA if higher. Data-center cooling and generators are held to these General Plan limits through permit conditions.

City-specific rules exist: Thousand Oaks, Moorpark, Ventura, Fillmore, Port Hueneme, Oxnard, and Camarillo have their own data center noise limits rules that differ from Ventura County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Leq1H of 55dB(A) or ambient noise level plus 3dB(A), whichever is greater, during any hour from 6:00 a.m. to 7:00 p.m.

Source: Ventura County Non-Coastal Zoning Ordinance (Division 8, Chapter 1)View official code

Full Breakdown

Unincorporated Ventura County regulates continuous, non-transportation noise through Policy HAZ-9.2.4 of the 2040 General Plan Hazards and Safety Element, applied to projects during permit and CEQA review. The exterior standard at a noise-sensitive receptor, homes, schools, hospitals, places of worship, is an hourly Leq of 55 dBA from 6 a.m. to 7 p.m., 50 dBA from 7 p.m. to 10 p.m., and 45 dBA from 10 p.m. to 6 a.m., or the ambient level plus 3 dBA, whichever is greater, measured at the exterior wall of the affected building. A data center's chillers, cooling fans, and backup-generator testing are engineered and conditioned to stay within these figures. A separate Construction Noise Control Plan governs the build phase.

Violations & Fines

Noise exceeding a project's HAZ-9.2.4 permit conditions is a permit violation. The county can require additional mitigation, issue notices of violation through code compliance, and, for continued noncompliance, move to revoke the discretionary permit.

Frequently Asked Questions

What is the noise limit for data-center equipment in Ventura County?
At a nearby home or other sensitive use: 55 dBA Leq during the day, 50 dBA in the evening, and 45 dBA at night, or ambient plus 3 dBA if that is higher, under General Plan Policy HAZ-9.2.4.
Where is the data-center noise measured?
At the exterior wall of the affected noise-sensitive building, a residence, school, hospital, or place of worship, not at the data center's own property line. The stricter of the fixed limit or ambient-plus-3 dBA applies.

Sources & Official References

Other rules in Ventura County

Noise Ordinances: Quiet HoursSome RestrictionsData Center Zoning & SitingSome RestrictionsNoise Ordinances: Leaf Blower RulesSome RestrictionsNoise Ordinances: Aircraft NoiseHeavy RestrictionsParking Rules: Curb Color RulesSome RestrictionsFence Regulations: Material RestrictionsSignificant RestrictionsAnimal Ordinances: Veterinary Clinic ZoningSome Restrictions

All Ventura County rules

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Data Center Noise Limits in Cities Across Ventura County

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