Is Collecting Rainwater Legal in Idaho? (2026)
Partially — Collecting Rainwater is legal with restrictions in Idaho as of 2026.
Quick Answer
Idaho allows rainwater collection but regulates water rights under the prior appropriation doctrine. According to Idaho Code §42-111, all water, including rainwater, is subject to state water rights, and collection may require a water right permit if it impacts other users.
What the Law Says
According to Idaho Code §42-111, all water, including rainwater, is subject to state water rights, and collection may require a water right permit if it impacts other users.
— Idaho Department of Water Resources
| Category | Details |
|---|---|
| Collection Rules | Permits may be required for significant rainwater collection impacting water rights. |
| Volume Limits & Permits | Sale of collected rainwater without a water right is prohibited. |
| Violation Penalties | Penalties include fines and possible forfeiture of water rights under Idaho Code §42-351. |
| Pending Legislation | None known |
Enforcement Reality
Local Exceptions
None identified. State law applies uniformly across Idaho. 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 Idaho. 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.
Idaho vs. the Rest of the US
Across the US, collecting rainwater is fully legal in 29 states, restricted in 21, and illegal in 0. Idaho falls in the RESTRICTED category.
View the full 50-state map →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.
Comprehensive Idaho Legal Guides
Explore all related legal topics in Idaho — statutes, penalties, and enforcement in one place.