Lodi uses the California Community Noise Equivalent Level (CNEL) framework in its General Plan Noise Element. Residential outdoor activity areas are designed to 60 CNEL, with 65 dBA being the threshold the State considers undesirable for new housing.
Lodi's General Plan Noise Element (Chapter 9) adopts the California Office of Planning and Research community noise compatibility matrix. Residential land uses are 'Normally Acceptable' up to 60 dBA CNEL exterior, 'Conditionally Acceptable' from 60 to 70 dBA, 'Normally Unacceptable' from 70 to 75 dBA, and 'Clearly Unacceptable' above 75 dBA. The Noise Element flags 65 dBA as the level at which siting new housing is undesirable absent mitigation. A 3 dB change is the threshold treated as perceptible. CNEL applies a 5 dB penalty to evening (7–10 p.m.) and a 10 dB penalty to nighttime (10 p.m.–7 a.m.) sound events, so nighttime noise carries far more weight in compliance calculations. Lodi Municipal Code Chapter 9.24 backs up these planning standards with nuisance-based enforcement against noise plainly audible across property lines.
Land-use projects that exceed the Noise Element thresholds must include acoustical analyses and mitigation (e.g., sound walls, building setbacks, window upgrades) to be approved. Ongoing operational noise that violates Chapter 9.24 is enforced as a nuisance, with penalties under LMC Title 1.
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Lodi, CA
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