Murrieta Municipal Code Chapter 9.02 sets receiving-zone decibel limits of 55 dBA day and 45 dBA night for residential, 65/60 dBA for commercial, and 70/65 dBA for industrial zones. Readings are taken with a Type 2 sound-level meter at the receiving property line.
Murrieta applies a dual-metric noise standard: a quantitative receiving-zone dBA chart and a qualitative plainly-audible test. Under Chapter 9.02 the measured dBA caps are: residential zones 55 dBA day (7 a.m.-10 p.m.) and 45 dBA night; commercial zones 65 dBA day and 60 dBA night; and industrial zones 70 dBA day and 65 dBA night. When noise crosses between zones, the more restrictive receiving-zone limit governs. Standard enforcement uses a Type 2 integrating sound-level meter calibrated before and after measurement, with the microphone placed 4-5 feet above grade and at least 4 feet from any reflective surface, at the receiving property line or at the nearest dwelling. A 5 dBA penalty is typically added for impulsive noise (bangs, pops) or for pure-tone content. Short-duration events may be averaged over a 15-minute Leq window. Complaints requiring meter readings usually come after warning and administrative citation and are performed by a contracted acoustical consultant or by Riverside County Environmental Health at the city's request.
Specific penalty amounts for this ordinance are not published in a publicly accessible fine schedule. Contact Murrieta code enforcement directly for current fines, enforcement procedures, and hearing options.
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