Decibel Limits: Downey vs Long Beach
How do decibel limits rules compare between Downey, CA and Long Beach, CA?
Downey has fewer restrictions than Long Beach.
Downey, CA
Los Angeles County
Downey Municipal Code Section 4600 establishes noise standards. Any noise exceeding 100 decibels at 25 feet or more from the source is a prima facie violation. Power tools and equipment in residential zones are restricted between 10 PM and 7 AM.
View full Downey 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 | Downey | Long Beach |
|---|---|---|
| Code Section | DMC §4600 | - |
| Prima Facie Limit | 100 dBA at 25 ft | - |
| Restricted Hours | 10 PM–7 AM (residential zones) | - |
| Applies To | R-1, R-2, R-3 zones | - |
| Enforcement | Downey PD: (562) 861-0771 | - |
| Residential Day | - | 50 dBA (7 AM-10 PM) |
| Residential Night | - | 45 dBA (10 PM-7 AM) |
| Commercial Day | - | 60 dBA |
| Commercial Night | - | 55 dBA |
| Code | - | LBMC 8.80.150-160 |
Highlighted rows indicate differences between cities.
Downey FAQ
What are Downey's noise limits?
Any noise exceeding 100 decibels at 25 feet from the source is a prima facie violation under Section 4600. Power equipment in residential zones is restricted between 10 PM and 7 AM.
Can I use power tools at night in Downey?
No. Power tools, machines, and equipment may not be used in residential zones (R-1, R-2, R-3) between 10 PM and 7 AM if the noise disturbs neighbors.
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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