Stormwater Management: Kapolei vs Mililani Mauka
How do stormwater management rules compare between Kapolei, HI and Mililani Mauka, HI?
Kapolei and Mililani Mauka 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 Mauka, HI
Honolulu County
Mililani Mauka properties connected to the city's separate storm sewer system fall under ROH Chapter 43, Article 11, which bars non-stormwater discharges and enforces MS4 water quality rules.
View full Mililani Mauka rules →Key Facts Comparison
| Fact | Kapolei | Mililani Mauka |
|---|---|---|
| - | - |
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 Mauka FAQ
Can I drain my Mililani Mauka pool into a storm drain?
No. Chlorinated pool water is a prohibited non-stormwater discharge under Sec. 43-11.22 and must be dechlorinated and discharged according to city guidance.
What about washing paint brushes in my driveway?
Paint and solvent residues that reach the storm drain are prohibited discharges; clean brushes in a sink connected to the sanitary sewer instead.
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