Industrial Noise: Honolulu vs Pearl City
How do industrial noise rules compare between Honolulu, HI and Pearl City, HI?
Honolulu and Pearl City have similar restriction levels.
Honolulu, HI
Honolulu County
Stationary-source industrial noise on Oahu is capped primarily by state rule HAR 11-46 with local backup from Honolulu's noise control article.
View full Honolulu rules →Pearl City, HI
Honolulu County
Pearl City industrial and commercial noise sources follow ROH Chapter 41 Article 6 and state HAR 11-46 dBA limits, protecting adjacent residential neighborhoods.
View full Pearl City rules →Key Facts Comparison
| Fact | Honolulu | Pearl City |
|---|---|---|
| City Code | ROH §§41-6.1–41-6.5 | - |
| State dBA Limits | HAR 11-46 | - |
| Enforcers | HPD, DOH | - |
| Coverage | All Oahu zones | - |
| Code Section | - | ROH Section 41-6 |
| State Rule | - | HAR 11-46 |
| Residential Class | - | Class A strictest |
| Dual Enforcement | - | DOH and HPD |
Highlighted rows indicate differences between cities.
Honolulu FAQ
Where are the decibel numbers for factories?
Zoning-based maximum permissible sound levels for stationary sources appear in state rule HAR 11-46, not directly in the Revised Ordinances of Honolulu.
Can the City cite an industrial facility?
Yes. Honolulu police and inspectors can cite under ROH Chapter 41 Article 6 in addition to state enforcement under HAR 11-46.
Pearl City FAQ
What about Pearlridge rooftop HVAC noise?
Rooftop equipment near Pearl City homes must meet HAR 11-46 dBA limits at the residential property line. DOH can require abatement like acoustic shielding or equipment upgrades.
Are small shops on Kamehameha Highway covered?
Yes. Any commercial operation whose noise reaches adjoining Pearl City residential zones must meet the applicable HAR 11-46 dBA limits and can be cited if exceeded.
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