Lehi, UT Noise from Specific Sources: Delivery Truck Noise (2026)

Lehi City Code section 5-3-1(A) places noises "necessarily made by commercial vehicles in process of transporting persons or goods" in the same category as construction and demolition noise and other sounds tied to ordinary business activity, the least offensive of the chapter's three noise classifications. Rather than banning that noise outright, the code authorizes city enforcement agencies to work with the businesses producing it to eliminate, modify or muffle the sound so commerce can continue while cutting its disturbing effects. If commerce-and-industry noise, including delivery truck operations, rises to a level that becomes harmful or disturbing, it is declared a public nuisance and must be abated, and a business's continued refusal to modify excessive noise after being asked is a class C misdemeanor under section 1-4-1.

Numeric limits for this category appear in section 5-3-6(A): continuous and intermittent sounds of commerce and industry may not exceed 85 dBA day or 55 dBA night as received in a residential/agricultural zone, 85 dBA day or 65 dBA night in a commercial zone, and 85 dBA day or 65 dBA night in a light industrial zone. Measurements are taken under section 5-3-5 by a peace officer or the city's code enforcement officer, using a calibrated sound level meter placed at the property line or fifty feet from the source, and a reading must exceed the limit for at least thirty seconds to count as a violation.

Section 5-3-7A assigns responsibility to whoever creates the noise, to the business, contractor or operator controlling the vehicle or equipment, and to the property owner or tenant who allows it to continue. Section 5-3-8 makes any violation a class C misdemeanor, with each day of continued violation a separate offense, subject to the fine and jail ceilings in section 1-4-1.