Decibel Limits: Downey vs Santa Clarita
How do decibel limits rules compare between Downey, CA and Santa Clarita, CA?
Downey and Santa Clarita have similar restriction levels.
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 →Santa Clarita, CA
Los Angeles County
Santa Clarita enforces noise limits under SCMC Chapter 11.44. The city prohibits noise that exceeds established levels for each land use zone. At the boundary between residential and commercial/manufacturing properties, the quieter zone's standard applies. Measurements use the A-weighted scale with slow response.
View full Santa Clarita rules →Key Facts Comparison
| Fact | Downey | Santa Clarita |
|---|---|---|
| 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 | - |
| Standard | - | Zone-based dB limits (SCMC 11.44.040) |
| Boundary Rule | - | Quieter zone applies |
| Pure Tone | - | -5 dB correction |
| Construction Weekday | - | 7 AM-7 PM (Mon-Fri) |
| Code | - | SCMC Ch. 11.44 |
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.
Santa Clarita FAQ
What are the noise limits in Santa Clarita?
SCMC Section 11.44.040 sets noise limits by land use zone. At boundaries between residential and commercial areas, the quieter zone's limit applies. Noise with a pure tone is penalized by 5 dB.
When is construction allowed in Santa Clarita?
7 AM to 7 PM Monday through Friday, and 8 AM to 6 PM Saturday, within 300 feet of residentially zoned property. No construction on Sundays or holidays.
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