Kapolei vs Pearl City
How do stormwater management rules compare between Kapolei, HI and Pearl City, HI?
Kapolei and Pearl City have similar restriction levels.
Kapolei, HI
Honolulu County
Kapolei properties tied to the city's separate storm sewer system are regulated by ROH Chapter 43, Article 11, which bars non-stormwater discharges and enforces MS4 water quality standards.
View full Kapolei rules →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 →Key Facts Comparison
| Fact | Kapolei | Pearl City |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
Kapolei FAQ
Can I pressure-wash my Kapolei driveway into the gutter?
If the runoff carries soaps, oils, or other pollutants to a storm drain, it is a prohibited non-stormwater discharge under Sec. 43-11.22.
What is the MS4 system?
The MS4 is the city's municipal separate storm sewer system, which carries untreated stormwater to coastal and stream outfalls under federal and local water quality rules.
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.
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