Washington County, UT Noise Ordinances: Decibel Limits (2026)

Washington County Code § 10-13-23(M) sets the county's only codified decibel standard and applies specifically to properties operating under a Short Term Rental (STR) License. , where the threshold rises to 75 dB. The code carves out one exception: noise from landscape maintenance equipment or personnel during daytime hours if reasonable and necessary to maintain the grounds. STR owners, owner-occupants, and local property managers must monitor for excessive noise using devices such as Party Squasher or Noise Aware, retain the resulting data for 90 days, and turn it over to the county within five business days of a request; failing to produce the data is itself a violation.

The same section bars events, parties, and open-invitation gatherings exceeding 40 people or the STR's licensed occupancy limit, whichever is lower. For comparison, the county's separate industrial performance standards at Washington County Code § 10-11-4 cap noise at the property line at 60 dB for Manufacturing-zoned uses and 70 dB for Industrial-zoned uses, muffled so that intermittence, beat frequency, or shrillness does not exceed normal street traffic noise. Outside of STR licensing and the Manufacturing/Industrial performance table, the code does not set a general residential decibel ceiling; ordinary neighbor-to-neighbor noise disputes fall to the county's nuisance and enforcement provisions at § 10-1-11 and § 10-1-12 rather than a numeric limit.