Anza, CA Noise Ordinances: Industrial Noise (2026)

Industrial and stationary noise is regulated on two tracks in unincorporated Riverside County. First, the enforceable Ordinance No. 847 sets maximum exterior sound levels at the receiving property line: Light Industrial is 75 dBA (day) / 55 dBA (night), and Heavy Industrial is 75 dBA day and night, while a sound received at a residence is still capped at the residential limit (typically 55 dBA day / 45 dBA night). Power tools and equipment are a special source under Section 6(b): they may not be audible inside any inhabited dwelling between 10:00 p.m. and 8:00 a.m., or audible more than 100 feet from the source at other times. Second, the General Plan Noise Element (GPA No. 960) provides planning-level stationary-source standards used when reviewing new projects. Table N-2 lists exterior standards for noise received at residential uses of 45 Leq (10-minute) from 10:00 p.m. to 7:00 a.m. and 65 Leq (10-minute) from 7:00 a.m. to 10:00 p.m., with interior standards of 40 and 55 Leq; Policy N 4.1 likewise prohibits facility-related noise at any sensitive use from exceeding 45 dBA (10-min Leq) at night and 65 dBA (10-min Leq) by day. The Noise Element notes special producers such as the area's natural-gas valve stations near Cabazon, where venting can exceed 140 dB Leq at 50 feet. New or expanding industrial projects are routinely required to submit acoustical studies and mitigation.