Decibel Limits: Ontario vs Rialto
How do decibel limits rules compare between Ontario, CA and Rialto, CA?
Ontario and Rialto have similar restriction levels.
Ontario, CA
San Bernardino County
Ontario applies exterior decibel standards set in zoning and noise rules. Residential limits are about 55 dBA daytime and 50 dBA nighttime at the property line, with higher limits in commercial and industrial zones.
View full Ontario rules →Rialto, CA
San Bernardino County
Rialto Municipal Code Title 9, Chapter 9.50 (Noise Control) establishes exterior noise limits measured at the property line of the impacted receiving land use. Limits vary by zoning of the receptor (residential strictest) and time of day (7am-10pm daytime vs 10pm-7am nighttime). Construction activity is separately regulated under the same chapter.
View full Rialto rules →Key Facts Comparison
| Fact | Ontario | Rialto |
|---|---|---|
| Daytime Residential | about 55 dBA | - |
| Nighttime Residential | about 50 dBA | - |
| Measurement | At receiving property line | Receiving property line (not source) |
| Adjustments | Impulsive or tonal reductions | - |
| Enforcement | Code Enforcement meter readings | - |
| Code section | - | Rialto MC Ch. 9.50 |
| Day vs night | - | 7:00 am-10:00 pm daytime; 10:00 pm-7:00 am nighttime |
| State interior standard | - | 45 dB CNEL (CCR Title 24 Pt 2 §1207) |
Highlighted rows indicate differences between cities.
Ontario FAQ
What is the legal noise level in Ontario residential zones?
Typically about 55 dBA during the day and 50 dBA at night measured at the receiving property line, with stricter limits for impulsive or tonal sound.
How does the city prove a decibel violation?
Code Enforcement uses a calibrated meter at the property line, averages readings, and considers any tonal or impulsive adjustments before issuing a citation.
Rialto FAQ
Do I need a decibel meter to file a complaint?
No. Report to Community Compliance; code officers use calibrated Type 2 sound level meters.
Are these limits the same in every zone?
No. The limit depends on the zoning of the property hearing the noise, not the noise source's zoning.
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