Is Collecting Rainwater Legal in Hawaii? (2026)
Partially — Collecting Rainwater is legal with restrictions in Hawaii as of 2026.
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Quick Answer
In Hawaii, collecting rainwater is generally allowed but regulated under the state's water rights system. According to Hawaii Revised Statutes §174C-3, water rights are governed by the Commission on Water Resource Management, and rainwater collection may require permits if it affects surface or groundwater rights.
What the Law Says
Rainwater collection may require permits if it affects surface or groundwater rights under Hawaii Revised Statutes §174C-3.
— Hawaii Department of Land and Natural Resources - Commission on Water Resource Management
| Category | Details |
|---|---|
| Collection Rules | Allowed with potential permit requirements depending on volume and impact on water resources. |
| Volume Limits & Permits | Sale of collected rainwater is generally prohibited without proper authorization. |
| Violation Penalties | Violations may result in fines or enforcement actions under HRS §174C. |
| Pending Legislation | None known |
Enforcement Reality
Local Exceptions
None identified. State law applies uniformly across Hawaii. Local ordinances may still vary — check with your city or county government for any additional rules.
Bottom Line
Collecting Rainwater is legal with restrictions in Hawaii. This activity is permitted, but specific conditions apply. Violating those conditions can result in fines or criminal charges. Read the rules carefully and consult an attorney if unsure.
Hawaii vs. the Rest of the US
Across the US, collecting rainwater is fully legal in 30 states, restricted in 20, and illegal in 0. Hawaii falls in the RESTRICTED category.
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Frequently Asked Questions
Is collecting rainwater legal in Hawaii?
What are the restrictions on collecting rainwater in Hawaii?
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Reviewed by cross-referencing the cited state statute against current legislative databases and regulatory publications.
Sources & Verification
This page was reviewed by Ethan Harper by comparing the legal status against the cited state statute. AllowedHere is an informational resource and does not provide legal advice. Consult a licensed attorney for guidance specific to your situation.
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