Ewa Gentry homeowners may install residential rain barrels and catchment without a Honolulu ordinance permit; state plumbing code allows small systems under 360 gallons.
The City and County of Honolulu has no specific ordinance regulating residential rainwater harvesting in Ewa Gentry or elsewhere on Oahu. Hawaii does not restrict rainwater collection, and neither the Board of Water Supply nor the Department of Health regulates individual residential catchment. Under the Hawaii Plumbing Code based on the 2018 UPC Chapter 16, exterior catchment systems for outdoor irrigation with storage up to 360 gallons do not require a permit. Because Ewa is a leeward dry zone, rain barrels help offset irrigation during wet months. BWS offers periodic rain barrel rebates, and Gentry HOAs may have aesthetic rules on barrel placement and screening.
No ordinance penalties apply for compliant backyard catchment. HOA rules can still require screening or limit front-yard placement in Gentry subdivisions.
Ewa Gentry, HI
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Ewa Gentry, HI
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Ewa Gentry, HI
Honolulu uses a minimum-stay rule rather than an annual night cap. Under ROH §21-5.730 (Ord. 22-7), every reservation under 30 consecutive days at a resident...
Ewa Gentry, HI
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Ewa Gentry, HI
Ewa Gentry residents may not enter or remain in public parks during posted closure hours under ROH Sec. 10-1.2, though direct traverse of beach parks to reac...
Ewa Gentry, HI
Honolulu has no separate juvenile curfew ordinance, so Ewa Gentry follows HRS Sec. 577-16: children under 16 are prohibited from public places between 10 p.m...
Side-by-side rule comparisons with other cities in Honolulu County.
See how other cities in Honolulu County handle rainwater harvesting.
See how Ewa Gentry's rainwater harvesting rules stack up against other locations.
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