San Leandro, CA Data Centers & Crypto Mining: Data Center Noise Limits (2026)
Key Facts
- Code
- Muni Code 4-1-1100 to 4-1-1130
- dBA table
- None (nuisance-based)
- Standard
- Disturbing, excessive, offensive noise
- Night motor rule
- Enclosed 9 p.m.-8 a.m.
- Enforcement
- Nuisance abatement, Ch. 1-12
Summary
San Leandro's Noise Ordinance sets no numeric decibel table. Municipal Code Section 4-1-1110 bans "disturbing, excessive or offensive" noise, judged on factors including sound level, proximity to homes, zoning, and time of day. A data center's cooling and generators must not create a nuisance.
It is unlawful for any person ... to make, continue, or cause to be made or continued any disturbing, excessive or offensive noise which causes discomfort or annoyance to reasonable persons of normal sensitivity.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4967405; v8 updated 2026-07-06).
Full Breakdown
Unlike Alameda County's numeric limits, San Leandro's Noise Ordinance (Title 4, Chapter 4-1, Article 11, Sections 4-1-1100 through 4-1-1130) is nuisance-based. Section 4-1-1110 prohibits noise that disturbs reasonable persons of normal sensitivity, weighed against the ambient level, proximity to residential property, zoning, time of day, and duration. Section 4-1-1115 bars operating any motor or engine between 9 p.m. and 8 a.m. unless enclosed so it is not plainly audible at a residential property line. For discretionary permits, CEQA review imposes stricter numeric noise conditions, so a data center abutting homes is engineered to the General Plan noise standards.
Violations & Fines
Noise that violates Section 4-1-1110 is a public nuisance abated under Municipal Code Chapter 1-12, and can breach the noise conditions placed on a data center's discretionary permit.
Frequently Asked Questions
How loud can a data center be in San Leandro?
What noise rule protects homes near a San Leandro data center?
Sources & Official References
Other rules in San Leandro
California rules heatmap·Compare San Leandro 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 Alameda County handle data center noise limits.