Fontana, CA Data Centers & Crypto Mining: Data Center Noise Limits (2026)
Key Facts
- Code
- FMC Sec. 18-62 / 18-63
- Standard
- 50-foot nuisance test
- Numeric dBA limit
- None
- General Plan
- 65 dBA CNEL compatibility
- Enforcement
- Infraction or misdemeanor
Summary
Fontana sets no numeric dBA property-line limit. Its noise ordinance, FMC Sections 18-62 and 18-63, bans loud, excessive, impulsive or intrusive sound audible 50 feet from the source that disturbs persons of ordinary sensibilities - so data-center chillers and generators are judged by nuisance, not decibels.
The following acts, which create loud, excessive, impulsive or intrusive sound or noise that annoys or disturbs persons of ordinary sensibilities from a distance of 50 feet or more from the edge of the property, structure or unit in which the source is located, are declared to be in violation of this article.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 64 | Zoning and Development Code: Supplement 17).
Full Breakdown
Fontana's noise ordinance sits in Municipal Code Chapter 18, Article II. Section 18-62 makes it unlawful to make loud, excessive, impulsive or intrusive sound that annoys or disturbs persons of ordinary sensibilities, and Section 18-63 declares such noise a violation when it carries 50 feet or more from the source property. Unlike San Bernardino County, which caps steady-tone equipment at 50 dBA day and 40 dBA night, Fontana fixes no numeric dBA limit and no day/night table in its ordinance. The General Plan Noise Element uses 65 dBA CNEL for land-use compatibility and CEQA review. A data center's continuous cooling and backup generators are therefore judged by the 50-foot nuisance standard.
Violations & Fines
Noise carrying 50 feet or more that disturbs neighbors violates FMC Section 18-63 and is enforced by Fontana as an infraction or misdemeanor, with administrative fines and abatement.
Frequently Asked Questions
How loud can a data center be in Fontana?
Does Fontana limit data-center noise in decibels like the county?
How can residents get stricter data-center noise rules in Fontana?
Sources & Official References
Other rules in Fontana
California rules heatmap·Compare Fontana to another location·View the California data centers & crypto mining overview
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