Decibel Limits: Altadena vs Torrance
How do decibel limits rules compare between Altadena, CA and Torrance, CA?
Altadena has fewer restrictions than Torrance.
Altadena, CA
Los Angeles County
Exterior noise in Altadena's residential zones is capped at 50 dBA daytime / 45 dBA nighttime (single-family); 55/50 dBA (multi-family); 60/55 dBA commercial; 70 dBA all hours industrial.
View full Altadena rules →Torrance, CA
Los Angeles County
Torrance establishes zone-based noise limits under TMC Chapter 46. Region 2 (residential): 65 dBA day / 55 dBA night. Region 1 (near refineries): 70 dBA day / 65 dBA night. Construction limited to 50 dB at property line during permitted hours. Train whistles prohibited above 96 dBA.
View full Torrance rules →Key Facts Comparison
| Fact | Altadena | Torrance |
|---|---|---|
| Code Section | LA County 12.08.390 | - |
| R-1 Day Limit | 50 dBA | - |
| R-1 Night Limit | 45 dBA | - |
| Multi-family Day/Night | 55 / 50 dBA | - |
| Commercial Day/Night | 60 / 55 dBA | - |
| Residential Day | - | 65 dBA (Region 2) |
| Residential Night | - | 55 dBA (Region 2) |
| Refinery Area Day | - | 70 dBA (Region 1) |
| Train Whistles | - | 96 dBA max |
Highlighted rows indicate differences between cities.
Altadena FAQ
What's the legal decibel limit at my Altadena property line?
50 dBA day / 45 dBA night for single-family residential under LA County Code 12.08.390.
Torrance FAQ
What are Torrance's noise limits?
Most residential areas: 65 dB(A) daytime and 55 dB(A) nighttime. Near refineries: 70/65 dB(A). Plus, any noise exceeding ambient by 5+ dB at residential property lines is a prima facie violation.
How do I file a noise complaint in Torrance?
Contact Torrance Noise Abatement at (310) 784-7950 or email noiseabatement@torranceca.gov.
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