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🌍 Environmental Rules/Stormwater Management

Ewa Gentry vs Mililani Town

How do stormwater management rules compare between Ewa Gentry, HI and Mililani Town, HI?

Ewa Gentry and Mililani Town have similar restriction levels.

Ewa Gentry, HI

Honolulu County

Heavy Restrictions

Ewa Gentry properties connecting to the city's separate storm sewer system are regulated by ROH Chapter 43, Article 11, which prohibits non-stormwater discharges and implements MS4 water quality standards.

View full Ewa Gentry rules β†’

Mililani Town, HI

Honolulu County

Heavy Restrictions

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 β†’

Key Facts Comparison

FactEwa GentryMililani Town
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Ewa Gentry FAQ

Can I drain my pool into the street in Ewa Gentry?

No. Chlorinated pool water is a prohibited non-stormwater discharge under Sec. 43-11.22 and must be dechlorinated and disposed of properly.

Is washing my car in the driveway allowed?

Residential car washing is generally tolerated, but soapy runoff to the storm drain can still violate water quality standards if it carries pollutants.

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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