Sioux Falls Code § 93.003 (Use district noise levels) sets the property-line decibel limits applicable to industrial sources. Residential receivers are protected at 60 dBA day / 55 dBA night; commercial receivers at 65 dBA. Construction equipment noise is capped at 75 dBA measured at 50 feet under § 93.002.
Industrial operations in Sioux Falls are regulated by the general use-district decibel framework in § 93.003, which evaluates noise at the boundary of the receiving (not the emitting) property. Where industrial noise crosses into an abutting residential district, the lower 60 dBA daytime / 55 dBA nighttime residential limits apply. Where it crosses into a commercial district, a 65 dBA limit applies 24 hours. Standard measurement is A-weighted (dBA), at least 25 feet from the source and at least 4 feet above the ground (the same methodology used for the motor-vehicle standards in § 93.008). Construction, repair, alteration, and demolition equipment is separately capped at 75 dBA measured at 50 feet under § 93.002. Sioux Falls is a home-rule city under SDCL Chapter 6-12 and uses its police powers (SDCL § 9-29-1) plus statewide nuisance authority (SDCL § 21-10-1) as the underlying basis. Persistent industrial noise exceeding the use-district limits is enforced by Sioux Falls Code Enforcement (Health Department) and may also be charged as disorderly conduct under SDCL § 22-18-35 if accompanied by intent to alarm.
Civil municipal infraction under Chapter 93. Complaints to Sioux Falls Code Enforcement (605-367-8255) or non-emergency police (605-367-7000). Persistent violations may be abated as a public nuisance under SDCL § 21-10-1 in addition to municipal penalties.
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