Quiet Hours: Chino vs Ontario
How do quiet hours rules compare between Chino, CA and Ontario, CA?
Chino and Ontario have similar restriction levels.
Chino, CA
San Bernardino County
Chino does not impose a strict bedtime curfew on residents, but Chino Municipal Code Chapter 9.40 (Noise) sets enforceable A-weighted decibel limits at the receiving residential property line that drop 5 dB between 10:00 p.m. and 7:00 a.m. Section 9.40.040 (Exterior Noise Standards) caps continuous noise (L50) at 55 dBA daytime / 50 dBA nighttime, with maximum (Lmax) of 75 dBA daytime / 70 dBA nighttime.
View full Chino rules →Ontario, CA
San Bernardino County
Ontario enforces nighttime quiet under OMC Title 5 Chapter 29. Loud or intrusive noise that disturbs the peace between 10 PM and 7 AM is stricter enforced, coordinated by Ontario Police and Code Enforcement.
View full Ontario rules →Key Facts Comparison
| Fact | Chino | Ontario |
|---|---|---|
| Code section | Chino Municipal Code § 9.40.040 (Exterior Noise Standards) | - |
| Nighttime window | 10:00 p.m. to 7:00 a.m. | - |
| Continuous noise cap (L50) | 55 dBA day / 50 dBA night at the property line | - |
| Absolute max (Lmax) | 75 dBA day / 70 dBA night | - |
| Loud-party fines | $250 / $500 / $750 per response (CMC Ch. 9.36, Ord. 2019-005) | - |
| Code | - | OMC Title 5 Chapter 29 |
| Night Hours | - | 10 PM to 7 AM |
| Standard | - | Disturbing peace after officer request |
| Enforcement | - | Ontario PD and Code Enforcement |
| City Hall | - | (909) 395-2000 |
Highlighted rows indicate differences between cities.
Chino FAQ
What time do quiet hours start in Chino?
The exterior noise limits drop 5 dB at 10:00 p.m. and return to daytime levels at 7:00 a.m. (CMC § 9.40.040). At night, anything louder than 50 dBA L50 or 70 dBA Lmax at your property line is a violation.
How loud can a neighbor be during the day?
Up to 55 dBA L50 / 70 dBA L02 / 75 dBA Lmax measured at your residential property line between 7 a.m. and 10 p.m. Short loud peaks above 75 dBA are violations any time of day.
Are loud parties handled separately?
Yes. CMC Chapter 9.36 (rewritten by Ord. 2019-005) imposes flat administrative fines ($250 / $500 / $750) on the host for each police response inside a 72-hour window, regardless of decibel reading.
Ontario FAQ
What are Ontario quiet hours?
Generally 10 PM to 7 AM. Noise that disturbs neighbors during these hours is subject to stricter enforcement under OMC 5-29.07.
Who do I call for a late-night noise complaint?
Call the Ontario Police non-emergency line for active disturbances. For repeat daytime issues, contact Code Enforcement through the city portal.
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