Oregon Livestock Water Rights: What Every Producer Needs to Know

Water is as fundamental to a livestock operation as the land itself, and in Oregon, the rules governing who can use it — and when — are more complex than many producers realize. Under Oregon law, all water belongs to the public. That single principle shapes every decision you make about how you water your herd, fill your stock tanks, or build a pond on your property.

Whether you run a small cow-calf operation in the Wallowas or manage a dairy in the Willamette Valley, understanding Oregon’s water rights framework is not optional — it is a legal necessity. This guide walks through the state’s water rights system, the exemptions available to livestock producers, how to secure a permit, and what happens to your water access when drought hits.

Important Note: This article provides general educational information about Oregon water law as it applies to livestock producers. Water rights law is complex and fact-specific. Consult the Oregon Water Resources Department (OWRD) or a licensed water rights attorney before making decisions about your operation’s water use.

How Oregon’s Water Rights System Affects Livestock Producers

Oregon’s water laws are based on the principle of prior appropriation, which means the first person to obtain a water right on a stream is the last to be shut off in times of low streamflows. Producers often summarize this as “first in time, first in right” — a phrase that carries real consequences when summer flows drop across eastern Oregon’s river systems.

With some exceptions, cities, irrigators, businesses, and other water users must obtain a permit or license from the Water Resources Department to use water from any source — whether it is underground, or from lakes or streams. Generally speaking, landowners with water flowing past, through, or under their property do not automatically have the right to use that water without authorization from the Department. Many ranchers assume that a stream crossing their pasture is theirs to use freely. It is not.

The water right, once developed, is a type of property right and is attached to the land where it was established. Land with an attached water right may be several miles from the actual source of water. This means that when you buy a ranch, you need to verify exactly what water rights — if any — transfer with the deed. If the land is sold, the water right goes with the land to the new owner.

Stock water rights are a separate category and among the oldest-priority rights in many basins. For ranchers in Harney, Malheur, or Grant counties, where some water rights date to the 1800s, that seniority can be the difference between a full trough and a dry one in a drought year. Many water rights in the state have priority dates in the mid- to late-1800s, and they remain valid today.

You can check existing water rights on your property or a parcel you are considering purchasing using the Oregon Water Resources Department’s water rights information portal. Doing this due diligence before you buy or expand protects you from costly surprises down the road. You may also find it useful to review Oregon’s livestock biosecurity requirements alongside your water planning, since both affect how you manage animal health infrastructure.

Stock Water Exemptions and What They Cover in Oregon

Not every drop of water your livestock drinks requires a formal water right permit. Oregon law carves out specific exemptions for stock watering, but those exemptions are narrower than many producers believe — and recent legislation has tightened them further for large operations.

The stock watering exemption covers use of water for stock watering from a permitted reservoir to a tank or trough, and, under certain conditions, use of water piped from a surface source to an off-stream livestock watering tank or trough. The key phrase is “under certain conditions” — the setup of your diversion system matters legally.

For groundwater, the exemption is broader on its face. Exemptions for domestic exempt well use include the stockwater exemption (unlimited water for livestock drinking water needs), domestic use of 15,000 gallons per day, noncommercial gardening on a half acre, and an exemption for a single commercial or industrial use of 5,000 gallons per day. However, that “unlimited” language for stock watering from exempt wells has become a flashpoint in Oregon water policy.

Oregon Senate Bill 85 aims to impose tighter water regulations for new confined animal feeding operations (CAFOs) — a term usually applied to large meat, dairy, and egg farms. Under the bill, new and expanding CAFOs will no longer have unlimited access to water to support their livestock operations and will need to submit detailed water supply plans to regulators as part of their permit applications. New CAFOs will also need to secure appropriate water rights to support their operations.

Senate Bill 85 puts new requirements on operations with more than 700 dairy cattle or 1,000 beef cattle. If your operation falls below those thresholds, the traditional stock water exemption still applies for drinking water, but you should confirm your specific situation with your local watermaster before assuming you are covered.

Pro Tip: The stock water exemption covers drinking water for livestock — it does not cover irrigating pastures or feed crops. Those uses require a separate water right permit regardless of operation size.

There is also a geographic limitation worth noting. If the diversion system is located within or above a scenic waterway, the amount of water that may be used without a water right is limited to one-tenth of one cubic foot per second per 1,000 head of livestock. Producers grazing near designated scenic waterways — including stretches of the Owyhee, Deschutes, and John Day rivers — face stricter limits than those on non-designated streams. You can find more about Oregon’s broader agricultural landscape and how water intersects with wildlife habitat in our guide to Oregon’s native wildlife.

How to Secure a Water Right for Livestock Use in Oregon

If your operation needs water beyond what the stock water exemption covers — or if you want a formal, senior right that protects your access during shortages — you will need to apply for a permit through the Oregon Water Resources Department.

Applying for and obtaining a water use permit is the first step of securing a water right. A water use permit generally requires the water user to develop the water use within four or five years. That development window matters: you must actually put the water to beneficial use within that timeframe or risk losing the permit.

The application you file depends on your water source:

• Surface water (rivers, streams, ditches): File a Surface Water Application with OWRD.
• Groundwater (wells): File a Groundwater Application. For wells drilled after July 22, 2009, landowners must notify OWRD and register the well, even if the water use is exempt.
• Reservoir storage: File a Reservoir Application under either the standard or alternate process, depending on pond size.

The date of application for a permit to use water usually becomes the priority date of the right. This is why timing matters so much in Oregon water law. Filing sooner gives your right an earlier priority date, which directly affects how long you keep water access during a shortage. The priority date of a water right is typically established when the application for a permit is submitted. This date determines the order in which users are given access to available water.

The process is not quick or cheap. Whether for surface or groundwater, applicants have reported wait times of a minimum of 18–24 months for application processing, and the cost starts at about $2,500 to apply. For the last 5–7 years, farmers have reported that the groundwater right application process is arduous, expensive, and uncertain. Many have reported a minimum of 18 months of wait time, and there is no guarantee the right will be approved.

Once you have a water right certificate, protect it. A water right is valid so long as it is used at least once every five years for its intended purpose. If the right is unused for five consecutive years, it is considered forfeited and subject to cancellation. For seasonal operations that may skip a dry year, this is a real risk — document your use carefully every year.

For a broader look at how Oregon regulates livestock operations beyond water, see our guide to livestock trailer requirements in Oregon and transporting livestock laws in Oregon.

Stock Ponds, Reservoirs, and Impoundment Rules in Oregon

Building a stock pond seems straightforward — but in Oregon, even a small earthen impoundment triggers water right requirements. The construction of a reservoir or pond of any size to store water requires a water right permit from OWRD. A permit for a reservoir with the sole purpose of storing water is considered the primary permit. Permittees intending to use stored water will need an additional water use permit, commonly referred to as a secondary permit.

Oregon offers two permitting tracks for stock ponds, and the one that applies to your project depends on size:

Permitting Track	Storage Capacity	Dam Height	Key Requirement
Alternate Reservoir Process	Less than 9.2 acre-feet	Less than 10 feet	Local watermaster and ODFW review
Standard Reservoir Process	9.2 acre-feet or greater	10 feet or greater	Engineered plans approved by OWRD dam safety section

In 1995, the Oregon Legislature created the Alternate Reservoir Process for small ponds. A permit issued under the Alternate Reservoir Process allows for the storage of water only. To use or appropriate the stored water requires a secondary permit for all out-of-reservoir uses, with few exceptions. For most livestock producers building a small stock pond, this two-permit structure is the path you will follow.

In the mid-1990s, owners were given a one-time opportunity to register certain types of pre-existing but unauthorized reservoirs with OWRD. If a registered reservoir met certain requirements, OWRD issued a letter confirming that the reservoir was exempt from permitting requirements, or issued an after-the-fact water right certificate. This was essentially an amnesty program intended to deal with the fact that there were literally thousands of existing ponds and reservoirs that had been constructed without proper water right permits.

Since then, the law has clearly required that any new reservoirs — or any pre-existing reservoirs that were not registered during the temporary amnesty program — must obtain a water right. If you have an old pond on your property that was never registered and you are uncertain of its status, contact your local watermaster before assuming it is covered. Construction or modification of a pond or reservoir may require adjustments to existing water rights, including changes to the place of use, point of diversion, or storage authorization. Before construction, landowners should consult OWRD, their local watermaster, or their irrigation district to confirm permitting requirements and ensure compliance.

Pro Tip: Modifying an existing stock pond — even just deepening it or raising the dam — can trigger a new permit requirement. Check with your watermaster before any excavation work begins.

Groundwater Access for Livestock Operations in Oregon

Many livestock producers in eastern Oregon rely on wells to water their herds, especially on rangeland far from surface streams. Oregon’s groundwater rules for stock watering are generally permissive for smaller operations, but they have grown more complex in recent years as aquifer levels have declined in key agricultural areas.

Oregon has established groundwater classified areas to manage water use in areas where groundwater resources are limited. These classified areas generally allow for new exempt groundwater uses but restrict new uses requiring a permit. These areas are primarily located in the northern Willamette Valley, with other classified areas across the state, including the South Coast, Fort Rock, Harney Valley, and Walla Walla. If your operation sits within a classified area, the rules governing new well permits are stricter than elsewhere in the state.

For stock watering specifically, groundwater from a domestic exempt well remains available without a permit under Oregon law. You may have access to a domestic well, but that is intended for home use and a few other exemptions, such as a personal home garden and livestock watering. The critical distinction is that this exemption covers drinking water for the animals — it does not authorize irrigating pasture or hay ground from the same well.

Oregon Senate Bill 85, signed by Governor Tina Kotek in 2023, changed the calculus for large operations. The new laws require large farming operations to have tougher water quality permitting and create a water supply plan. The laws also do not allow farms to use drinking water for livestock without a permit or water right. Smaller dairies may have to design water systems with flow meters to track drinking water usage for livestock.

If you need a new groundwater permit beyond what the stock water exemption covers, it is recommended that you review the OWRD Groundwater Permit Application Guidebook and check the list of restricted sources available on the Department’s website before applying. If the Department receives an application for a restricted source identified on that list, the application will be returned along with all or a portion of the fees submitted. Checking the restricted source list first saves you time and money.

You can also explore how water availability intersects with wildlife on your land. Oregon’s aquatic ecosystems support a wide range of species — from freshwater snails to waterfowl — and understanding those relationships can help you manage riparian areas in ways that satisfy both OWRD requirements and wildlife considerations. Our overview of waterfowl in Oregon covers some of the species you may encounter near stock ponds and streams.

Water Rights During Drought and Shortage in Oregon

Drought is not a hypothetical risk for Oregon livestock producers — it is a recurring operational reality. After experiencing the warmest winter in almost a century, Oregonians are bracing for drought conditions throughout many parts of the state in 2026. In late March of this year, Governor Tina Kotek signed an executive order declaring drought emergencies in three eastern Oregon counties: Baker, Deschutes, and Umatilla. Understanding how Oregon’s water priority system operates during declared emergencies is essential for protecting your herd.

The prior appropriation system does not soften during drought — it hardens. There is no proportional distribution during drought; the most senior rights are entitled to take all of the water authorized for their use before anyone else receives water. If your water right has a junior priority date and a senior right holder upstream calls for water, your access can be shut off entirely, even if your cattle are thirsty.

There is one important protection for livestock producers. If rights in conflict have the same date of priority, then the law indicates domestic use and livestock watering have preference over other uses. However, if a drought is declared by the Governor, the Commission can adopt rules that give preference to stock watering and human consumptive purposes, regardless of the priority dates. This means that during a declared drought, your livestock’s drinking water can be legally protected even against senior rights holders with earlier priority dates.

Oregon also provides an emergency permit pathway for drought situations. Eligible water rights holders can apply for Emergency Groundwater Use Permits for Drought, established under ORS 536.700 et seq. These sections codify the legal framework for Emergency Water Shortage Powers, authorizing temporary flexibility in the regulation of water use during declared drought conditions.

To qualify, you must meet specific thresholds. An applicant must satisfy the threshold criteria that (a) drought conditions have created an inability to obtain water under an existing water right, and (b) the technical and legal description of the proposed use is in a designated drought area. The proposed use may only function as a replacement for and not an enlargement of an existing water right.

There are also short-term tools available even before an emergency permit is needed. If the governor issues a drought declaration for a county, water users in that county can access emergency water-use tools, one of which is a drought transfer — a short-term transfer of a water right to change its type of use, place of use, or location of the point of diversion. This tool can allow you to move water from one part of your operation to another during a crisis without permanently altering your water right.

Pro Tip: Do not wait for a drought declaration to review your water right documents. Know your priority date, your authorized volume, and your point of diversion before a shortage hits. Contact your local watermaster at the first sign of a dry year — they can advise you on curtailment orders before they affect your herd.

Producers managing operations across multiple counties should also monitor drought declarations by county, since the Governor’s 2026 declaration came more than three months earlier than the first similar drought declaration in Baker County in 2025, and the last drought emergencies in Deschutes and Umatilla Counties occurred in 2023 and 2021, respectively. Drought declarations can be issued at different times in different counties, so your neighbor’s operation may face curtailment before yours does — or vice versa.

For additional guidance on managing your Oregon livestock operation within state regulatory frameworks, see our resources on livestock biosecurity requirements and livestock transport laws. For questions specific to your water district, contact the Oregon Water Resources Department or reach out to your local watermaster through the OWRD district directory.