Kapolei vs Mililani Town
How do stormwater management rules compare between Kapolei, HI and Mililani Town, HI?
Kapolei and Mililani Town 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 →Mililani Town, HI
Honolulu County
Mililani stormwater is regulated under ROH Chapter 43 Article 11, which prohibits most non-stormwater discharges to the city's separate storm sewer flowing to Waikele Stream.
View full Mililani Town rules →Key Facts Comparison
| Fact | Kapolei | Mililani Town |
|---|---|---|
| - | - |
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.
Mililani Town FAQ
Can I wash my car in my Mililani driveway?
Occasional washing on grass is generally fine, but detergent-laden runoff flowing into the street drain is a prohibited discharge.
Is yard fertilizer regulated?
Over-applying fertilizer so runoff reaches the storm drain can be cited; follow label rates and sweep granules off hard surfaces.
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