Is Rainwater Collection Legal in Hawaii? (2026)
Yes. In Hawaii, rainwater collection is legal. Hawaii DOH states that rainwater catchment systems on individual homes are not regulated by DOH and recommends design, maintenance, treatment and testing precautions for domestic use..
Key facts
- Status
- Legal
- Permit required
- No
- Jurisdiction
- Hawaii
- Last reviewed
- 2026-05-19
Rainwater Collection laws in Hawaii
Hawaii DOH’s Safe Drinking Water Branch states that rainwater catchment systems on individual homes are not regulated by the department. Its guidance addresses household rooftop catchment and recommends careful design, regular cleaning and maintenance, and periodic testing to reduce contamination risks. It recommends considering a certified filtration or treatment system for contaminants of concern and cautions that a certification covers only the contaminants listed. This agency statement concerns individual-home catchments; it does not establish that every public, commercial or other system is unregulated, or that untreated catchment water is safe to drink.
Frequently asked questions
Is rainwater collection legal in Hawaii for travelers?
For travelers visiting Hawaii, rainwater collection is currently legal. Hawaii DOH’s Safe Drinking Water Branch states that rainwater catchment systems on individual homes are not regulated by the department. Its guidance addresses household rooftop catchment and recommends careful design, regular cleaning and maintenance, and periodic testing to reduce contamination risks. It recommends considering a certified filtration or treatment system for contaminants of concern and cautions that a certification covers only the contaminants listed. This agency statement concerns individual-home catchments; it does not establish that every public, commercial or other system is unregulated, or that untreated catchment water is safe to drink.
Do I need a permit for rainwater collection in Hawaii?
Hawaii does not specifically require a permit for rainwater collection, though general regulations apply.
Can I transport rainwater collection through Hawaii?
Transport laws for rainwater collection in Hawaii depend on the specific item and your route. Generally, transport is allowed if you comply with state regulations. Always check states you pass through.
What are the penalties for rainwater collection violations in Hawaii?
Penalties for rainwater collection violations in Hawaii vary based on the specific offense. Always verify current laws before traveling.