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Data Centers & Crypto Mining

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

By CityRuleLookup Editorial Team

If you live in Folsom 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. Folsom 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

Folsom caps exterior noise at any affected residence, not the source's own property line. Under Municipal Code Section 8.42.040 the residential standard is 50 dBA daytime and 45 dBA at night, never to exceed 70/65 dBA. Data-center cooling, generators, and substations must comply.

Key details: Code: Muni Code Sec. 8.42.040. Residential limit: 50 dBA day / 45 night. Absolute cap: 70 dBA day / 65 night. Measured at: Affected residence, within 50 feet. Substation & AC cap: 50 dBA.

Noise over the Chapter 8.42 limits is an infraction: written notice first, then $100, $200, and $500 fines, and the city may seek a court-ordered injunction and abate it as a public nuisance.

Data Center Zoning & Siting

The City of Folsom has no data-center use category and no dedicated ordinance. Data centers locate in the M-1, M-2, and M-L industrial districts, permitted by right as assembly or manufacturing inside an enclosed building, or by Planning Commission use permit if classed as a C-3 use.

Key details: Dedicated ordinance: None. Zones: M-1, M-2, M-L industrial. By-right: Manufacturing / assembly use. Use permit: C-3-classed uses. Discretionary review: CEQA + hearing.

Building or operating a data center outside an industrial district, or without the Planning Commission use permit when the use requires one, is a zoning violation enforced by Community Development through stop-work orders, penalties, and abatement.

This is one of the stricter rules in Folsom's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

The Bottom Line

Folsom'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 Folsom is broadly strict or permissive.

This guide is based on Folsom's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.