Is Rainwater Collection Legal in Colorado? (2026)
It depends. In Colorado, rainwater collection is restricted. CSU Extension’s August 2025 review describes the limited residential two-barrel collection pathway..
Key facts
- Status
- Restricted
- Permit required
- No
- Jurisdiction
- Colorado
- Last reviewed
- 2026-05-19
Rainwater Collection laws in Colorado
Colorado State University Extension’s guide, published May 2025 and reviewed August 2025, describes the HB16-1005 residential pathway: eligible single-family households and multifamily households with four or fewer units may use at most two barrels with combined storage no greater than 110 gallons, collecting rooftop-downspout water for outdoor use on the same property. The guide states that barrel water cannot be used for drinking or other indoor uses and that this pathway does not create a water right. It separately describes permitted collection for qualifying exempt-well users. These are attributed public-university explanations; confirm the applicable pathway with Colorado DWR before using a larger system or claiming a different exemption.
Frequently asked questions
Is rainwater collection legal in Colorado for travelers?
For travelers visiting Colorado, rainwater collection is currently restricted. Colorado State University Extension’s guide, published May 2025 and reviewed August 2025, describes the HB16-1005 residential pathway: eligible single-family households and multifamily households with four or fewer units may use at most two barrels with combined storage no greater than 110 gallons, collecting rooftop-downspout water for outdoor use on the same property. The guide states that barrel water cannot be used for drinking or other indoor uses and that this pathway does not create a water right. It separately describes permitted collection for qualifying exempt-well users. These are attributed public-university explanations; confirm the applicable pathway with Colorado DWR before using a larger system or claiming a different exemption.
Do I need a permit for rainwater collection in Colorado?
Colorado does not specifically require a permit for rainwater collection, though general regulations apply.
Can I transport rainwater collection through Colorado?
Transport laws for rainwater collection in Colorado 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 Colorado?
Penalties for rainwater collection violations in Colorado vary based on the specific offense. Always verify current laws before traveling.