Unincorporated Maricopa County has no crypto-mining-specific ordinance. Blockchain and cryptocurrency mining operations are treated as data centers or industrial uses, allowed only in IND-2 and IND-3 districts and bound by the same rezoning and noise rules.
Maricopa County's zoning ordinance does not single out cryptocurrency or blockchain mining. Because these operations are computing facilities, the county regulates them under the same framework as data centers: a permitted use in the IND-2 general industrial and IND-3 heavy industrial districts, with rezoning required for other parcels. Arizona is broadly a property-rights, business-friendly state and has enacted no local crypto-mining ban. Mining sites face the same constraints as any data center — industrial siting away from homes, building permits, and Noise Ordinance P-23's 500-foot audibility limit on cooling fans and equipment. There is no county energy-use cap specific to mining.
A crypto mine on non-industrial land is a zoning violation subject to permit denial and code enforcement. Excessive noise from mining rigs and cooling fans is prosecuted under Noise Ordinance P-23, with fines up to $750 per offense.
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