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Data Centers & Crypto Mining

Data Centers & Crypto Mining in Pasadena, CA: What Residents Actually Need to Know

By CityRuleLookup Editorial Team

If you live in Pasadena or are thinking about moving there, data centers & crypto mining are one of those things you probably won't think about until they affect you directly. Pasadena has 2 specific rules on the books covering different aspects of data centers & crypto mining, and some of them might surprise you.

Data Center Noise Limits

Pasadena sets no fixed decibel ceiling. Its noise ordinance, Municipal Code Chapter 9.36, makes it unlawful for any machinery, fan, or air-conditioning device to raise noise at a property line more than 5 decibels above the ambient level - and adds 5 decibels for a steady audible tone.

Key details: Code: Muni Code Ch. 9.36. Standard: Ambient + 5 dB(A). Machinery/fans: Sec. 9.36.090. Steady tone penalty: Plus 5 dB(A). Measured at: Property line.

Noise over the ambient-plus-5-decibel limit is a misdemeanor and public nuisance under Chapter 9.36, enforced by the environmental health division through citations, abatement, and civil action.

Data Center Zoning & Siting

Pasadena's zoning code has no data-center use category. A proposal is classified case-by-case into the closest existing use - Research and Development, Industry, or Communications facilities - and directed to the IG General Industrial zone. On March 11, 2026, a City committee ordered staff to draft dedicated rules.

Key details: Dedicated ordinance: None; study underway. Industrial zone: IG Industrial, General. Data center use: Not listed in code. Permit path: Case-by-case classification. Study directed: March 11, 2026.

Building or operating a data center outside the IG industrial zone, or without a required Conditional Use Permit for a major utility use, is a Zoning Code violation enforced by Planning through stop-work orders and abatement.

The Bottom Line

Pasadena's data centers & crypto mining rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Pasadena is broadly strict or permissive.

All of the above reflects Pasadena's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.