Stormwater Management: Kailua vs Kapolei
How do stormwater management rules compare between Kailua, HI and Kapolei, HI?
Kailua and Kapolei have similar restriction levels.
Kailua, HI
Honolulu County
Kailua's beach-adjacent watersheds are protected by ROH Chapter 43, Article 11 and Chapter 14, Article 12, which restrict non-stormwater discharges to the city's separate storm sewer system.
View full Kailua rules →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 →Key Facts Comparison
| Fact | Kailua | Kapolei |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
Kailua FAQ
Can I wash my car in the driveway?
Occasional home car washing is tolerated, but detergent-laden runoff into the storm drain can violate the discharge rules, especially near the beach.
What about pressure-washing the house?
Rinse water should be contained on landscaping where possible, not allowed to flow into the storm drain carrying paint or chemicals.
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.
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