Decibel Limits: Mountain View vs Santa Clara
How do decibel limits rules compare between Mountain View, CA and Santa Clara, CA?
Mountain View and Santa Clara have similar restriction levels.
Mountain View, CA
Santa Clara County
Mountain View Chapter 21 sets specific decibel thresholds varying by zoning district and time of day, measured at property lines with standardized equipment.
View full Mountain View rules →Santa Clara, CA
Santa Clara County
Santa Clara sets decibel limits by zone under City Code Chapter 9.10: 50/55 dBA residential, 60/65 dBA commercial, and 70 dBA industrial, measured at the receiving property line.
View full Santa Clara rules →Key Facts Comparison
| Fact | Mountain View | Santa Clara |
|---|---|---|
| Residential day | 55 dBA | - |
| Residential night | 45 dBA | - |
| Commercial day | 65 dBA | - |
| Industrial day | 70 dBA | - |
| Meter standard | ANSI Type 1 or 2 | - |
| Residential Day Limit | - | 55 dBA |
| Residential Night Limit | - | 50 dBA |
| Commercial Day/Night | - | 65 / 60 dBA |
| Industrial Zone Limit | - | 70 dBA |
| Measurement Method | - | Type 2 meter at property line |
Highlighted rows indicate differences between cities.
Mountain View FAQ
How do I know if something exceeds the limit?
Use a calibrated sound meter app for a rough estimate, then request a formal measurement from Code Enforcement for enforcement action.
Are short loud noises okay?
Short peaks are measured against an Lmax threshold about 10 to 15 dBA above the baseline limit.
Santa Clara FAQ
How does Santa Clara measure noise complaints?
Code Enforcement uses Type 2 A-weighted sound level meters at the complainants property line, typically for 15 minutes of Leq readings.
What if my neighbors music is plainly audible but not over 50 dBA?
The plainly audible standard for music after 10 PM is independent and can still be a violation even below 50 dBA.
Compare other topics
See how Mountain View and Santa Clara compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool