Quiet Hours: Ontario vs Rialto
How do quiet hours rules compare between Ontario, CA and Rialto, CA?
Ontario and Rialto have similar restriction levels.
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 →Rialto, CA
San Bernardino County
Rialto Municipal Code Chapter 9.50 (Noise Control) prohibits unreasonably loud, unnecessary or unusual noise that disturbs the peace at any hour, and sets two nighttime thresholds for amplified sound: 'plainly audible' at 50 ft between 8 a.m.–10 p.m. and at 25 ft between 10 p.m.–8 a.m.
View full Rialto rules →Key Facts Comparison
| Fact | Ontario | Rialto |
|---|---|---|
| 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 | Police Department and Code Enforcement Division jointly (§9.50.080) |
| City Hall | (909) 395-2000 | - |
| Daytime amplified-sound limit | - | Plainly audible at 50 ft, 8 a.m.–10 p.m. (RMC §9.50.030(A)(4)(c)) |
| Nighttime amplified-sound limit | - | Plainly audible at 25 ft, 10 p.m.–8 a.m. (RMC §9.50.030(A)(4)(d)) |
| Across property line | - | Plainly audible across any property boundary is prohibited at all hours (§9.50.030(A)(4)(a)) |
| Maximum fine | - | $1,000 per offense for 4th violation in 12 months (§9.50.130) |
Highlighted rows indicate differences between cities.
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.
Rialto FAQ
What are Rialto's official quiet hours?
Rialto does not use a single 'quiet hours' label, but RMC §9.50.030(A)(4) draws the line at 10 p.m.–8 a.m., when amplified music or sound may not be 'plainly audible' beyond 25 feet from the source. During daytime hours (8 a.m.–10 p.m.) the threshold relaxes to 50 feet.
Can my neighbor be cited at 11 p.m. if I can hear their TV through the wall?
Yes. RMC §9.50.030(A)(4)(b) prohibits amplified sound that is plainly audible through partitions common to two residences within a building, at any hour. Detecting the bass vibration is enough to meet the 'plainly audible' standard under §9.50.020.
What is the fine for a first noise violation?
Up to $250 for a first conviction (RMC §9.50.130). The officer may instead issue a written warning first under §9.50.030(D); however a second violation within 72 hours can escalate to a criminal citation plus the actual cost of each police response (§9.50.090).
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