The City of Sonora has no cryptocurrency-mining ordinance. A commercial mining operation is treated as manufacturing in the ML Limited Manufacturing zone under Chapter 17.28 and is bound by the Chapter 8.20 nuisance and construction-noise rules, with no energy or dBA cap.
Sonora's Municipal Code names no crypto-mining, bitcoin, or blockchain use and sets no energy cap. A warehouse of mining rigs draws power and produces heat and noise like any data center, so the city classifies it as limited manufacturing and locates it in the ML zone (Chapter 17.28), permitted by right if it produces no air or water pollution and does not endanger public health or safety. Its noise is controlled through Chapter 8.20's nuisance rule and General Plan compatibility standards, not a decibel cap. Home-based mining is ordinary residential use, still subject to the nuisance rule.
There are no crypto-specific penalties. A commercial mining operation outside the ML zone, or without required Site Plan or use-permit approval, is a zoning violation, and its noise is enforced as a nuisance under Chapter 8.20.
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