Santa Ana, CA Data Centers & Crypto Mining: Data Center Noise Limits (2026)
Key Facts
- Code
- Sec. 18-312 (Noise Zone 1)
- Day Limit
- 55 dB(A) at residence (7am-10pm)
- Night Limit
- 50 dB(A) at residence (10pm-7am)
- Pure-Tone/Impact
- Limits drop 5 dB(A)
- Coverage
- Entire city (Noise Zone 1)
Summary
Santa Ana has no data-center-specific noise rule, but Municipal Code Sec. 18-312 caps exterior noise reaching any residential property at 55 dB(A) daytime (7 a.m.–10 p.m.) and 50 dB(A) at night (10 p.m.–7 a.m.). A data center's cooling equipment and generators must meet these limits.
Noise Zone 1: 55 dB(A) 7:00 a.m.—10:00 p.m.; 50 dB(A) 10:00 p.m.—7:00 a.m. In the event the alleged offensive noise consists entirely of impact noise, simple tone noise, speech, music, or any combination thereof, each of the above noise levels shall be reduced by five (5) dB(A).
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 32).
Full Breakdown
The entire city is Noise Zone 1 (Sec. 18-311). Section 18-312 sets exterior noise standards measured on residential property: 55 dB(A) between 7 a.m. and 10 p.m. and 50 dB(A) overnight, though brief bursts are allowed on a sliding scale up to 20 dB(A) over the limit. If the noise is pure-tone, impact, speech, or music, each limit drops 5 dB(A). A data center's chillers, cooling towers, and backup generators must meet these caps at the nearest home. The M1 operational standard in Sec. 41-473(a) separately bars any use from a detrimental noise, light, or vibration effect on adjacent uses. These numbers match unincorporated Orange County's standard, but the City sets and enforces them under its own code.
Violations & Fines
Exceeding the Sec. 18-312 limits is a violation of the Municipal Code, enforced on a complaint basis and measured at the affected residential property. Each day a violation continues can be treated as a separate offense.
Frequently Asked Questions
How loud can a data center be in Santa Ana?
Does Santa Ana have a special data-center noise rule?
Sources & Official References
Other rules in Santa Ana
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