Unincorporated Orange County has no cryptocurrency-mining ordinance. A commercial crypto-mining or blockchain facility is treated as a data center: an unlisted M1 industrial use needing a Planning Commission Use Permit, and its noise must meet the countywide residential limits.
The County's zoning and noise codes contain no crypto-mining, bitcoin, or blockchain provisions. Because a mining operation is a room full of servers generating heat and noise, it is reviewed as a data center or unlisted industrial use under Zoning Code Table 7-9-34.2, allowed in the M1 "Light Industrial" district only with a discretionary Planning Commission Use Permit and CEQA review. Continuous noise from mining rigs and cooling must stay within the Sec. 4-6-5 limits of 55 dB(A) day and 50 dB(A) night at any nearby residence. Home hobby mining is treated as ordinary residential use but must still meet those noise limits and any HOA rules.
There are no crypto-specific penalties. A commercial mining facility built without the required Use Permit is a zoning violation, and noise over the Sec. 4-6-5 limits is a misdemeanor enforced by the County.
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