Riparian and prior-appropriation doctrines
Learn why state-law approaches and historical claims differ.
A careful research sequence
Learn why state-law approaches and historical claims differ. For agricultural users, water law is not uniform nationally. Rights may arise from permits, historic appropriations, riparian rules, contracts or groundwater statutes, and the terminology and exceptions differ.
- Identify whether the intended withdrawal is groundwater, surface water, delivered irrigation water, rainwater or reclaimed water.
- Locate the property, well or diversion point on a map and determine whether a district or basin authority has jurisdiction.
- Ask the actual regulator about registration, permit exemptions, allocations, fees, measurement and reporting.
- Check whether drought notices, transfer rules or limitations apply to this source and planned use.
- Keep written permits, meter readings, maps, correspondence and expiration dates in one record.
Questions for an authority
- Does my parcel or diversion point fall within your jurisdiction?
- What is the exact citation and current effective date of the applicable rule?
- Do you distinguish an existing water right from authority to drill or pump?
- Are metering, beneficial-use reports, permit renewals or change applications required?
- Does the activity have a seasonal or emergency restriction?
More water topics
Water rights fundamentalsUnderstand the distinction between water ownership, access and permission to use.Groundwater wells and pumpingResearch groundwater regulation, registration, pumping limits and groundwater districts.Surface-water diversion permitsResearch streams, reservoirs, diversion points, priority dates and exemptions.Agricultural irrigation authorizationsMatch proposed withdrawal, crop, acreage and season to relevant approvals.Groundwater districts and local boardsFind basin authorities, conservation districts and local rulebooks.Water-use reporting and meteringTrack withdrawal volumes, measurement methods, records and deadlines.
Official sources to verify
Do not rely on this directory as a permit or legal determination. Confirm the actual rule, location, water source, service area, and effective date with the issuing agency.
Agriculture reading
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