Quiet Hours: Chino vs Rialto
How do quiet hours rules compare between Chino, CA and Rialto, CA?
Chino and Rialto 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 →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 | Chino | Rialto |
|---|---|---|
| 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) | - |
| 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) |
| Enforcement | - | Police Department and Code Enforcement Division jointly (§9.50.080) |
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.
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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