Pearl City vs Waipahu
How do stormwater management rules compare between Pearl City, HI and Waipahu, HI?
Pearl City and Waipahu have similar restriction levels.
Pearl City, HI
Honolulu County
Pearl City's drainages into Pearl Harbor estuary fall under strict ROH Chapter 43, Article 11 stormwater rules prohibiting non-stormwater discharges to the city's MS4 system.
View full Pearl City rules →Waipahu, HI
Honolulu County
Waipahu's dense neighborhoods discharge stormwater toward Pearl Harbor and must comply with ROH Chapter 43, Article 11, which prohibits non-stormwater discharges to the city's MS4 system.
View full Waipahu rules →Key Facts Comparison
| Fact | Pearl City | Waipahu |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
Pearl City FAQ
Where can I wash my car in Pearl City without violating stormwater rules?
Use a commercial car wash that routes to sanitary sewer, or wash on a lawn where runoff infiltrates. Wash water running to a storm drain violates Sec. 43-11.22.
Does the rule cover rainwater from my roof?
Uncontaminated stormwater from roofs is allowed to enter the MS4. Only non-stormwater discharges like soapy water, chemicals, or wastewater are prohibited.
Waipahu FAQ
What is an illicit stormwater discharge in Waipahu?
Any non-stormwater flow into the city storm drain, such as soapy water, chemicals, paint, or wastewater, is classified as an illicit discharge prohibited under Sec. 43-11.22.
What if my business rinses equipment outside?
Outdoor rinsing that drains to a storm inlet violates Sec. 43-11.22. Rinse water must be captured, directed to sanitary sewer with permission, or contained to prevent storm drain entry.
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