Rialto, CA Data Centers & Crypto Mining: Data Center Noise Limits (2026)
Key Facts
- Code
- Muni Code Chapter 9.50
- Decibel limit
- None adopted
- Standard
- Plainly audible; unreasonably loud
- Equipment hours
- 7 a.m. to 8 p.m.
- Industrial exemption
- Section 9.50.060(O)
Summary
Rialto's noise ordinance, Municipal Code Chapter 9.50, sets no decibel limits. It bans plainly audible and unreasonably loud noise, and Section 9.50.060(O) exempts sounds in industrial zones incidental to permitted uses. San Bernardino County, by contrast, caps 55 dBA day and 45 dBA night.
The following activities and noise sources shall be exempt from the provisions of this chapter: ... O. Sounds generated in commercial and industrial zones that are necessary and incidental to the uses permitted therein;
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 39).
Full Breakdown
Chapter 9.50 contains no dBA table and no day/night decibel standard. Section 9.50.030(A)(7) prohibits unreasonably loud, unnecessary or unusual noise, judged on factors including level, duration, time of day, and whether the noise is recurrent, intermittent or constant. Section 9.50.050 restricts operating electrically powered compressors and fans to the hours of 7:00 a.m. to 8:00 p.m. in all zones. Section 9.50.060(O) exempts industrial-zone sounds incidental to permitted uses, and 9.50.060(N)(4) defers to Title 18 performance standards. Section 18.38.060 requires M-1 uses not be obnoxious or offensive by reason of noise or vibrations. Rialto has no steady-tone penalty.
Violations & Fines
A noise violation under Section 9.50.030 is an infraction and a public nuisance, drawing citations, criminal and civil penalties, and abatement orders from Rialto code enforcement officers or police.
Frequently Asked Questions
How loud can a data center be in Rialto?
Does Rialto limit chiller or generator noise at night?
Sources & Official References
Other rules in Rialto
California rules heatmap·Compare Rialto to another location·View the California data centers & crypto mining overview
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Data Center Noise Limits in Nearby Cities
How other cities in San Bernardino County handle data center noise limits.