Hemet, CA Noise Ordinances: Industrial Noise (2026)

The City of Hemet sets enforceable numeric limits specifically for industrial and manufacturing noise. Municipal Code Chapter 30, Article II, Section 30-32(32) restricts the production of any electrical or mechanical sound or noise from any property zoned C-M (commercial-manufacturing) or M (manufacturing/industrial) and projected onto residential property to a table of limiting noise levels: 65 dB below 75 cycles per second, 60 dB for 75-150, 55 dB for 151-600, 45 dB for 601-2,400, and 40 dB above 2,400 cycles per second (sound-pressure level re .002 microbar). Separately, the zoning code performance standards in Chapter 90, Article XXX, Section 90-1046 require uses placed into operation to comply with octave-band noise levels measured at the zone boundary, with two columns - M-1 and M-2: for example 72 dB (M-1) and 79 dB (M-2) below 75 cycles, decreasing across bands to 32 dB (M-1) and 39 dB (M-2) at 4,800 cycles and above. Chapter 90, Sec. 90-214(p) further requires permanent mechanical equipment that the building section finds to be a source of vibration or noise to be shock-mounted or isolated to lessen transmission. Together these provisions give Hemet a real, frequency-based industrial noise framework rather than a single dBA cap, with the strictest protection where industrial sound reaches residential property.