Kailua vs Kaneohe
How do rainwater harvesting rules compare between Kailua, HI and Kaneohe, HI?
Kailua and Kaneohe have similar restriction levels.
Kailua, HI
Honolulu County
Kailua residents can collect rainwater for outdoor irrigation without a permit; the Board of Water Supply offers rebates for rain barrels on windward lots.
View full Kailua 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 | Kailua | Kaneohe |
|---|---|---|
| Permit threshold | 360 gallons storage | 360 gallons storage |
| Code reference | Hawaii Plumbing Code Ch. 16 | Hawaii Plumbing Code Ch. 16 |
| Rebates | BWS rain barrel program | BWS rain barrel program |
| Indoor use | Requires plumbing permit | Requires plumbing permit |
Highlighted rows indicate differences between cities.
Kailua FAQ
Can I install rain barrels on my Kailua home?
Yes. Exterior barrels up to 360 gallons for outdoor irrigation are allowed without a permit. BWS offers rebates to offset purchase costs.
Can I plumb harvested water into my Kailua kitchen?
Only with a plumbing permit and proper backflow protection. Indoor use is treated as a non-potable supply under the Hawaii Plumbing Code.
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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