Bonneville County, ID Noise Ordinances: Decibel Limits (2026)

350, titled Other Standards, sets the numeric ceiling for any property operating in the LNC Zone: no noise allowed above 70 dBa, and no offensive dust or odors are permitted either. 5 foot-candles) and requires that building heights and setbacks in the LNC Zone track whatever the adjacent zone allows, so a noisy or bright use cannot hide behind looser LNC standards. The LNC Zone itself is capped at two acres per parcel, must sit at the intersection of an arterial and a collector street in a residentially zoned or planned area, and is limited to one per intersection, which keeps the zone's uses, and their noise output, concentrated rather than scattered through the unincorporated county.

Because the 70 dBa figure lives inside the zone's performance standards rather than a countywide noise chapter, it governs commercial and neighborhood-service uses sited in an LNC Zone specifically; it does not by its terms extend to the county's residential, agricultural or industrial zones, which are governed by their own chapters of Title 156. Enforcement runs through the County Zoning Administrator, who reviews compliance as part of ordinary zoning administration for the district.