Land records · Parcel maps · October 7, 2026
Prior Appropriation Water Rights Explained
How prior appropriation water rights work: first in time, first in right. Western states allocate water by priority date and beneficial use.
Prior appropriation water rights are water rights based on the principle of first in time, first in right, used in most western U.S. states. Under this system, the right to use water from a stream or aquifer comes from putting it to beneficial use, such as irrigation, municipal supply, or industry, rather than from owning land next to the water. Each right has a priority date, a source, an amount, a place of use, and a purpose. In shortages, senior rights with older priority dates are satisfied before junior rights. This page is general land-records background, not legal advice.
Key elements of a water right
| Element | Meaning |
|---|---|
| Priority date | When the right was established |
| Source | Stream, spring, or aquifer |
| Amount | Flow rate or volume |
| Point of diversion | Where water is taken |
| Place of use | Where water is used |
| Purpose | Irrigation, domestic, municipal, industrial |
Beneficial use and use it or lose it
Rights must be used for a beneficial purpose. Long periods of nonuse can lead to abandonment or forfeiture under state law.
Prior appropriation vs riparian
Riparian rights, common in eastern states, give owners of land next to water a right to reasonable use. Prior appropriation separates water rights from land ownership and ranks users by date. Some states use hybrid systems.
Water rights and land sales
Water rights may transfer with land or be sold separately, depending on state law and the deed. Buyers of irrigated land should confirm which rights are included. Deeds may expressly convey or reserve water rights, much like a mineral deed separates minerals from the surface estate.
Where records are kept
State water agencies, such as the state engineer or department of water resources, keep records of permits, decrees, and adjudications. County land records may hold deeds conveying water rights. Shares in irrigation companies may be separate from land titles.
Adjudications
Many western states have court proceedings to determine all water rights in a basin, producing decrees listing each right and priority.
Changes in use
Changing the place, purpose, or point of diversion usually requires approval to protect other users from injury.
Example
A ranch in Colorado holds an irrigation right with an 1885 priority date. In a dry year, the ranch’s senior right is satisfied before a subdivision’s 1990 right. When the ranch is sold, the deed conveys the water right, and the buyer files ownership changes with the state.
Domestic wells
Many western states allow small domestic wells under simplified permits, but limits on use, such as household only, may apply.
Due diligence
Check state water records, the deed for water language, irrigation company shares, and use history before buying land where water matters. See how to find deed restrictions.
Bottom line
Prior appropriation water rights allocate water by priority date and beneficial use, separate from land ownership, in most western states. Rights can transfer with land or separately. Check state water agency records and deeds before buying irrigated or rural western land. Explore western counties via the Platbookmapper map.
Prior appropriation water rights FAQ
What is prior appropriation?
A water rights system based on first in time, first in right.
What is a priority date?
The date a water right was established.
Do water rights come with land?
Sometimes; they can also be sold separately.
Can I lose a water right?
Long nonuse can lead to abandonment or forfeiture.
Where are water rights recorded?
With state water agencies and sometimes in county land records.