San Jose, CA Data Centers & Crypto Mining: Data Center Noise Limits (2026)
Key Facts
- Stationary-Noise Cap
- 55 dBA DNL at property line
- Governing Policy
- General Plan EC-1.3
- Single-Family Outdoor
- 60 dBA DNL (EC-1.1)
- Applied Through
- Special Use Permit + CEQA
- Code Noise Rule
- Ch. 10.16 (qualitative)
Summary
San Jose caps a new data center's noise at 55 dBA DNL at the property line where it sits next to homes or public uses, under General Plan Policy EC-1.3. This is a General Plan and CEQA standard, applied at permit review, not a codified property-line dBA ordinance.
Mitigate noise generation of new nonresidential land uses to 55 dBA DNL at the property line when located adjacent to existing or planned noise sensitive residential and public/quasi-public land uses.
Full Breakdown
San Jose does not run a numeric property-line noise code like Santa Clara County's. Its Municipal Code Chapter 10.16 bars only "disturbing or unreasonably loud" noise, with no decibel figures. The hard number lives in the Envision San José 2040 General Plan: Policy EC-1.3 limits a new nonresidential use, a data center's chillers, cooling towers, and backup generators included, to 55 dBA DNL at the property line when adjacent to residential or public/quasi-public land. The limit is enforced through the Special Use Permit and CEQA review: applicants submit an acoustical study and add enclosures, barriers, or setbacks to meet 55 dBA. Policy EC-1.2 separately flags a significant impact where a project raises noise 5 dBA DNL.
Violations & Fines
A project that cannot show 55 dBA DNL at an adjacent residential property line fails CEQA noise review and permit conditions; exceedances after occupancy are enforced as permit-condition and public-nuisance violations by the City.
Frequently Asked Questions
How loud can a data center be in San Jose?
Does San Jose have decibel limits in its noise ordinance?
Sources & Official References
Other rules in San Jose
California rules heatmap·Compare San Jose 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 Santa Clara County handle data center noise limits.