Stormwater Management: East Honolulu vs Waipahu
How do stormwater management rules compare between East Honolulu, HI and Waipahu, HI?
East Honolulu and Waipahu have similar restriction levels.
East Honolulu, HI
Honolulu County
East Honolulu's coastal drainages to Maunalua Bay and Hawaii Kai waterways fall under ROH Chapter 43, Article 11 stormwater rules prohibiting non-stormwater discharges to the city's MS4 system.
View full East Honolulu 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 | East Honolulu | Waipahu |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
East Honolulu FAQ
Is it okay to drain my Hawaii Kai pool into the street?
No. Pool water typically contains chlorine and other chemicals and is classified as a non-stormwater discharge prohibited under Sec. 43-11.22 without special handling.
What should I do with wash water from my driveway?
Direct wash water to landscaped areas or capture it, as soapy or chemical-laden wash water entering a storm drain is a prohibited discharge under city stormwater rules.
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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