Ewa Gentry vs Kapolei
How do rainwater harvesting rules compare between Ewa Gentry, HI and Kapolei, HI?
Ewa Gentry and Kapolei have similar restriction levels.
Ewa Gentry, HI
Honolulu County
Ewa Gentry homeowners may install residential rain barrels and catchment without a Honolulu ordinance permit; state plumbing code allows small systems under 360 gallons.
View full Ewa Gentry rules →Kapolei, HI
Honolulu County
Kapolei residents may install residential rain barrels without a Honolulu ordinance permit; small catchment up to 360 gallons is exempt under state plumbing code.
View full Kapolei rules →Key Facts Comparison
| Fact | Ewa Gentry | Kapolei |
|---|---|---|
| City code | No specific ordinance | No specific ordinance |
| Plumbing code | Up to 360 gallons exempt | Up to 360 gallons exempt |
| Incentive | BWS rain barrel rebates | BWS rebate programs |
| HOA layer | Gentry aesthetic rules apply | - |
| Climate fit | - | Dry leeward offset |
Highlighted rows indicate differences between cities.
Ewa Gentry FAQ
Do I need a permit for a rain barrel in Ewa Gentry?
No. Small outdoor catchment under 360 gallons is exempt under Hawaii Plumbing Code, and Honolulu has no residential catchment ordinance for Ewa Gentry homes.
Will my Gentry HOA allow a rain barrel?
Most allow screened barrels in side or back yards. Check your Gentry subdivision design guidelines before placing barrels visible from the street.
Kapolei FAQ
Do I need a Kapolei permit for a rain barrel?
No. Residential outdoor catchment under 360 gallons is exempt under Hawaii Plumbing Code, and Honolulu has no specific ordinance for Kapolei residential catchment.
Can Kapolei businesses install large cisterns?
Yes, but larger commercial systems may require plumbing permit review if they exceed the 360-gallon exterior irrigation exemption under the Hawaii Plumbing Code.
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