Kailua vs Pearl City
How do rainwater harvesting rules compare between Kailua, HI and Pearl City, HI?
Kailua and Pearl City 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 →Pearl City, HI
Honolulu County
Pearl City allows residential rainwater harvesting with no ordinance restriction. Rain barrels are practical for yards in Pacific Palisades and Manana, with BWS rebates available.
View full Pearl City rules →Key Facts Comparison
| Fact | Kailua | Pearl City |
|---|---|---|
| Permit threshold | 360 gallons storage | - |
| Code reference | Hawaii Plumbing Code Ch. 16 | - |
| Rebates | BWS rain barrel program | Board of Water Supply offers |
| Indoor use | Requires plumbing permit | - |
| Ordinance | - | None specific to harvesting |
| Permit-free limit | - | Up to 360 gallons outdoor |
| Guidance | - | UH CTAHR catchment program |
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.
Pearl City FAQ
Do Pearl City HOAs allow rain barrels?
Rules vary by association. Many allow screened rain barrels; check your specific condo or townhouse association's architectural guidelines before installing.
Is BWS rebate available for Pearl City rentals?
Rebates are typically issued to the account holder; renters should coordinate with landlords since the BWS account holder receives the rebate.
Compare other topics
See how Kailua and Pearl City compare on other ordinance categories.
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