Is Rainwater Collection Legal in California? (2026)
Yes. In California, rainwater collection is legal. California Water Board guidance states that rooftop rainwater harvesting does not require a water-right permit under Water Code section 10574.. A permit or license is required.
Key facts
- Status
- Legal
- Permit required
- Yes
- Jurisdiction
- California
- Last reviewed
- 2026-05-19
Rainwater Collection laws in California
The State Water Resources Control Board’s water-rights FAQ states that Water Code section 10574 exempts rooftop rainwater harvesting from the water-right permit requirement. The Board encourages rooftop collection that reduces demand on streams and water-quality problems associated with stormwater runoff. This is a water-right permit statement for rooftop harvesting; it does not establish exemptions for diversion from streams or underground water, or approve a drinking-water or plumbing system.
Frequently asked questions
Is rainwater collection legal in California for travelers?
For travelers visiting California, rainwater collection is currently legal. The State Water Resources Control Board’s water-rights FAQ states that Water Code section 10574 exempts rooftop rainwater harvesting from the water-right permit requirement. The Board encourages rooftop collection that reduces demand on streams and water-quality problems associated with stormwater runoff. This is a water-right permit statement for rooftop harvesting; it does not establish exemptions for diversion from streams or underground water, or approve a drinking-water or plumbing system.
Do I need a permit for rainwater collection in California?
Yes, California requires a permit or license for rainwater collection. Contact the relevant state agency for application details.
Can I transport rainwater collection through California?
Transport laws for rainwater collection in California 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 California?
Penalties for rainwater collection violations in California vary based on the specific offense. Always verify current laws before traveling.