Decibel Limits: Castaic vs Long Beach
How do decibel limits rules compare between Castaic, CA and Long Beach, CA?
Castaic and Long Beach have similar restriction levels.
Castaic, CA
Los Angeles County
LA County Code Section 12.08.390 establishes tiered exterior noise standards by zone for unincorporated areas. Residential limits are 50 dBA day and 45 dBA night. Commercial zones allow 60/55 dBA and industrial zones allow 70 dBA at all times.
View full Castaic rules →Long Beach, CA
Los Angeles County
Long Beach enforces exterior noise limits by district under LBMC 8.80.150. Residential areas (District 1) are limited to 50 dBA daytime (7 AM-10 PM) and 45 dBA nighttime (10 PM-7 AM). Commercial (District 2) allows 60 dBA day / 55 dBA night. Industrial zones reach 65-70 dBA.
View full Long Beach rules →Key Facts Comparison
| Fact | Castaic | Long Beach |
|---|---|---|
| Code Section | §12.08.390 | - |
| Residential Day | 50 dBA | 50 dBA (7 AM-10 PM) |
| Residential Night | 45 dBA | 45 dBA (10 PM-7 AM) |
| Commercial Day | 60 dBA | 60 dBA |
| Industrial | 70 dBA always | - |
| Commercial Night | - | 55 dBA |
| Code | - | LBMC 8.80.150-160 |
Highlighted rows indicate differences between cities.
Castaic FAQ
What are the decibel limits in unincorporated LA County?
Residential areas are limited to 50 dBA during the day and 45 dBA at night. Commercial zones allow 60 dBA daytime and 55 dBA nighttime. Industrial zones permit 70 dBA at all times.
How are noise violations measured in LA County?
Noise is measured at the property line of the affected party using the A-weighted decibel scale. Duration matters too — exceeding limits for more than 30 minutes per hour triggers Standard No. 1.
Long Beach FAQ
What is the noise limit in residential areas of Long Beach?
50 dBA during daytime (7 AM-10 PM) and 45 dBA during nighttime (10 PM-7 AM) in District 1 (predominantly residential), as set by Table A in LBMC Section 8.80.160.
How are noise violations measured in Long Beach?
By cumulative duration per hour at the receiving property line. Noise exceeding the district standard for more than 30 minutes per hour is a violation, with stricter thresholds at higher dB levels.
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