Water Rights for Land Buyers: Riparian vs. Prior Appropriation
Water law is one of the biggest differences between buying land in the East and the West. In some states owning land that touches a stream gives you rights to use it; in others, a water right is a separate property interest that may or may not come with the land. Know which system applies before you pay for a parcel that depends on water.
Riparian rights
Most eastern states follow riparian law: owners of land that borders a stream, river or lake generally have a right to make reasonable use of the water. Many of those states also layer permit requirements on larger withdrawals, so reasonable use still has limits.
Prior appropriation
Most western states follow prior appropriation, often summarized as "first in time, first in right". A water right is a separate legal interest tied to a priority date, a source, a place of use and an amount. It may be sold or lost separately from the land, and owning land next to a stream does not by itself give you the right to use that water.
States that mix both
Some states, including California, Oklahoma and Texas, combine elements of both systems depending on the water source, so the answer can differ for surface water and groundwater.
What to confirm before you buy
- Whether the parcel has a legal water right, and if so, its source, priority and the amount that conveys with the land.
- Whether a domestic well is allowed, what permit it needs, and whether a well on the parcel (or neighboring wells) has produced adequately.
- Whether irrigation water, a ditch or canal share, or a stock-water right is included, and what dues or assessments apply.
- Whether the water rights have been used recently; in some systems unused rights can be forfeited.
A well or a creek is not the same as a right
A producing well or a creek on the property is useful, but it does not prove you have a legal right to use that water for your purpose. Confirm with the state water agency or the county, and ask your title company or a local water attorney to review the documents.
Frequently asked questions
What is the difference between riparian and appropriation water law?
Riparian law ties water use to owning land next to the water, subject to reasonable use. Prior appropriation treats a water right as a separate interest with a priority date, so the right can be bought, sold or lost separately from the land.
Does buying land in the West include water rights?
Not automatically. Water rights are often separate from the land and have to be confirmed and conveyed in the deed or a separate document.
Can I drill a well on any parcel?
Not always. Wells usually require a permit, and some areas restrict new wells or require a minimum lot size. Check with the county and the state water agency before you buy.