Industrial Noise: Ontario vs San Bernardino
How do industrial noise rules compare between Ontario, CA and San Bernardino, CA?
Ontario and San Bernardino have similar restriction levels.
Ontario, CA
San Bernardino County
Ontario controls industrial and warehouse noise through zoning-based exterior sound limits and the nuisance ordinance. Noise crossing into residential zones faces daytime limits and stricter nighttime limits.
View full Ontario rules →San Bernardino, CA
San Bernardino County
Industrial noise limits in San Bernardino follow Development Code 19.20.030 standards, with exterior caps of 70 to 75 dBA depending on zone. SCAQMD Rules 444 and 445 regulate stationary sources.
View full San Bernardino rules →Key Facts Comparison
| Fact | Ontario | San Bernardino |
|---|---|---|
| Code | OMC 5-29.07 and Development Code | Development Code 19.20.030(15) |
| Night Limits | Stricter 10 PM to 7 AM | - |
| Measurement | At residential property line | - |
| Truck Idling | 5-minute state limit | - |
| Regulator | City plus SCAQMD coordination | - |
| Industrial Cap | - | 70 to 75 dBA exterior |
| Abutting Residential | - | 55 dBA at shared boundary |
| Regional Rules | - | SCAQMD Rules 444 and 445 |
Highlighted rows indicate differences between cities.
Ontario FAQ
Who enforces warehouse noise in Ontario?
Ontario Code Enforcement and Planning staff handle land-use-based complaints. SCAQMD handles idling and diesel emission rules that often overlap with noise complaints.
Are there truck idling rules?
Yes. California limits truck idling to 5 minutes and SCAQMD Rule 2305 adds warehouse indirect-source requirements that push operators toward low-idle yard operations.
San Bernardino FAQ
Who regulates train noise?
Rail operations are largely federally preempted under the ICCTA; local limits apply to stationary yard activity but not through-trains.
What limit applies where industry meets homes?
At a shared industrial-to-residential boundary, the lower residential limit of about 55 dBA day applies.
Compare other topics
See how Ontario and San Bernardino 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