Decibel Limits: Downey vs Glendale
How do decibel limits rules compare between Downey, CA and Glendale, CA?
Downey has fewer restrictions than Glendale.
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 →Glendale, CA
Los Angeles County
Glendale enforces presumed ambient noise standards under GMC 8.36.040. Residential (single-family/duplex) zones are limited to 55 dBA daytime and 45 dBA nighttime exterior. Multifamily residential allows 60 dBA. Commercial zones are set at 65 dBA. Any noise exceeding the presumed ambient plus 5 dBA is a violation.
View full Glendale rules →Key Facts Comparison
| Fact | Downey | Glendale |
|---|---|---|
| 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 | - | 55 dBA (single-family) |
| Residential Night | - | 45 dBA |
| Multifamily | - | 60 dBA anytime |
| Commercial | - | 65 dBA anytime |
| Code | - | GMC 8.36.040 |
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.
Glendale FAQ
What is the noise limit in Glendale residential areas?
Single-family and duplex zones: 55 dBA daytime, 45 dBA nighttime. Multifamily zones: 60 dBA anytime. Any noise exceeding the presumed ambient plus 5 dBA is a violation under GMC 8.36.040.
How does Glendale measure noise violations?
Using the A-weighted scale with slow response at the property line. If noise contains a pure tone or impulsive sound, the standard is reduced by 5 dBA.
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