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🌿 Landscaping Rules/Rainwater Harvesting

East Honolulu vs Pearl City

How do rainwater harvesting rules compare between East Honolulu, HI and Pearl City, HI?

East Honolulu and Pearl City have similar restriction levels.

East Honolulu, HI

Honolulu County

Few Restrictions

East Honolulu permits residential rainwater harvesting. No Honolulu ordinance restricts collection, and the Board of Water Supply offers rebates attractive for large Hawaii Kai and Aina Haina lots.

View full East Honolulu rules β†’

Pearl City, HI

Honolulu County

Few Restrictions

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 β†’

Key Facts Comparison

FactEast HonoluluPearl City
OrdinanceNone specific to harvestingNone specific to harvesting
Permit-free limitUp to 360 gallons outdoorUp to 360 gallons outdoor
RebatesBoard of Water Supply offersBoard of Water Supply offers
GuidanceUH CTAHR catchment programUH CTAHR catchment program

Highlighted rows indicate differences between cities.

East Honolulu FAQ

Do I need a permit for a rain barrel in Hawaii Kai?

No. Outdoor catchment for irrigation with storage up to 360 gallons is exempt from plumbing permits and no Honolulu ordinance restricts it.

Can I use collected rainwater for drinking?

Potable use systems must meet Hawaii Department of Health standards and typically require treatment. Most East Honolulu residents use catchment only for landscape irrigation.

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.

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