Pinal County, AZ Noise Ordinances: Decibel Limits (2026)

Section 10-24 of the Pinal County Code sets Table 1, the Limiting Sound Levels for Land Use Districts, which applies only in the unincorporated county under Section 10-19; incorporated cities such as Florence, Casa Grande, Maricopa, Apache Junction, Coolidge and Eloy, plus Indian reservations, are excluded. Residential-classified parcels, including CR-1A, CR-1 through CR-5, OS, MH, RV, MHP, PM/RVP and TR, may not exceed 60 dBA between 7:00 a.m. and 8:00 p.m., dropping to 55 dBA overnight. Rural zones, CAR, SR, SR-1, SH, GR, GR-5 and GR-10, run higher at 65 dBA daytime (7:00 a.m. to 9:00 p.m.) and 60 dBA at night.

Commercial zones CB-1 and CB-2 allow 65 dBA until 10:00 p.m. and 60 dBA after, while industrial zones CI-B, CI-1 and CI-2 top out at 70 dBA daytime and 65 dBA overnight. The limits are measured as the ambient sound pressure level, LEQ, averaged over a two-minute interval at the property line where the sound is generated, using an ANSI S1.4-1971 Type 2 sound level meter set to slow response under Section 10-23. Section 10-24(2) adds a cross-boundary rule: sound projected from one zoning district into an adjoining district with a lower limit cannot exceed that lower limit, so a commercial lot next to a residential subdivision must still hold to the 60/55 dBA residential ceiling at the shared line. The chapter was adopted under the board of supervisors' police power in A.R.S. Section 11-251(31) and its general ordinance authority in A.R.S. Section 11-251.05.