Caldwell, ID Noise Ordinances: Industrial Noise (2026)

Caldwell's noise ordinance is written to accommodate, not single out, industrial activity. Section 07-13-05 (Exceptions) provides that sound created by or resulting from regular business activities in areas appropriately zoned for such activities is exempt from the public noise prohibition—language that expressly includes regular industrial and flight operations at the Caldwell Executive Airport. As a result, there is no separate decibel cap or special set of hours for factories, warehouses, or industrial sites operating in their proper zones; their routine operations are treated as permitted. The general Public Noise Disturbance rule (Section 07-13-03) still applies where the activity is not 'regular business' in an appropriate zone—for example, an industrial-type noise source intruding on a residential area between 11:00 p.m. and 7:00 a.m. and plainly audible 150 feet away. Industrial land uses are also shaped by Caldwell's zoning code, which determines where such uses may locate. For nuisance-type complaints that fall outside the zoning exemption, the City's nuisance abatement procedures (Section 07-11-05) provide the enforcement mechanism, and persistent unreasonable noise could be evaluated under the disorderly conduct standard (Section 08-01-27).