Ewa Gentry vs Kaneohe
How do rainwater harvesting rules compare between Ewa Gentry, HI and Kaneohe, HI?
Ewa Gentry and Kaneohe 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 →Kaneohe, HI
Honolulu County
Kaneohe's high rainfall makes rainwater collection practical; exterior systems up to 360 gallons need no permit, and BWS offers rain barrel rebates.
View full Kaneohe rules →Key Facts Comparison
| Fact | Ewa Gentry | Kaneohe |
|---|---|---|
| City code | No specific ordinance | - |
| Plumbing code | Up to 360 gallons exempt | - |
| Incentive | BWS rain barrel rebates | - |
| HOA layer | Gentry aesthetic rules apply | - |
| Permit threshold | - | 360 gallons storage |
| Code reference | - | Hawaii Plumbing Code Ch. 16 |
| Rebates | - | BWS rain barrel program |
| Indoor use | - | Requires plumbing permit |
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.
Kaneohe FAQ
Should Kaneohe homeowners size rain barrels larger than 360 gallons?
Often yes, given local rainfall. Tanks over 360 gallons or plumbed indoors need permits and backflow devices, but the extra storage pays off quickly.
Can I water my Hoomaluhia-adjacent yard from catchment?
Yes. Outdoor irrigation from rainwater is unregulated by ROH, and BWS encourages it as a drought-resilient source for windward gardens.
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