Anza, CA Noise Ordinances: Quiet Hours (2026)

Riverside County regulates noise in its unincorporated communities (such as Mead Valley, Thousand Palms, Idyllwild, Anza and Mecca) through Ordinance No. 847, adopted by the Board of Supervisors. Rather than a flat 'curfew,' the ordinance sets numeric sound-level standards that tighten at night. Section 4 prohibits creating sound on one property that causes the exterior sound level on any other occupied property to exceed the limits in Table 1. Those limits are split into a daytime window of 7:00 a.m. to 10:00 p.m. and a nighttime window of 10:00 p.m. to 7:00 a.m. For most residential General Plan designations (Estate, Very Low, Low, Medium and High Density Residential), the maximum is 55 dBA (Lmax) by day and 45 dBA at night. Rural Residential, Rural Mountainous and Rural Desert designations are held to 45 dBA day and night. Several special sound sources carry their own nighttime cutoff of 10:00 p.m. to 8:00 a.m., including audio equipment, power tools, motor-vehicle sound systems and amplified or live music. Enforcement falls to the Riverside County Sheriff and Code Enforcement, who may use a calibrated sound level meter measured anywhere within the complaining property. Several state, governmental, school and agricultural activities are exempt under Section 2.