Utah Domestic Well Exemption: The Easiest Path to a Private Well

Utah is a prior appropriation state — in theory, all groundwater belongs to the public, and using it requires a legally established water right. For most large-scale water users, that means a formal water right application, a priority date, and years of potential administrative proceedings. But for the average Utah homeowner wanting water for their house and property, the state created a much simpler pathway: the domestic well exemption.

The domestic exemption is not a loophole or a workaround. It is a statutory provision under Utah Code §73-3-3.5 that explicitly authorizes single-family residential water use without requiring a formal water right, subject to defined limitations. Understanding exactly what it allows — and what it does not — is essential before you commit to a well project.

What the Domestic Well Exemption Is

The domestic well exemption allows the owner of a single-family residence to drill a well and use up to 0.5 acre-feet of groundwater per year (approximately 163,000 gallons) without obtaining a formal water right. The exemption is granted through the Utah Division of Water Rights (UDWR), which administers all water rights and well permitting in the state.

This 0.5 acre-foot annual limit sounds restrictive, but consider what it covers in practice: the average Utah household of four people uses roughly 50–80 gallons per person per day for indoor uses — drinking, cooking, bathing, laundry, and toilets. That adds up to about 73,000–117,000 gallons per year, comfortably within the exemption limit for the household itself. The remaining water is available for limited outdoor and agricultural uses specified in the law.

Who Qualifies for the Domestic Exemption

To use the domestic well exemption, you must meet all of the following criteria:

• Single-family residential use only — the well must serve one household (one dwelling unit). It cannot serve multiple houses, a subdivision, a business, or any commercial purpose.
• The property must be your residence or intended residence — vacation rentals and investment properties that you do not personally occupy may not qualify.
• Total annual use must not exceed 0.5 acre-feet (approximately 163,000 gallons) — summing all uses including household, irrigation, and livestock.
• No existing water right can already cover this use — if you already have a water right appurtenant to your property, the exemption may not apply to additional use.
• The use must be for the allowed purposes described below.

What the Exemption Allows

The domestic exemption authorizes three categories of use, all subject to the 0.5 acre-foot per year total limit:

1. Household Use

All typical indoor residential uses: drinking, cooking, bathing, laundry, dishwashing, toilets, and similar activities for the residents of the single-family dwelling.

2. Lawn and Garden Irrigation

Irrigation of up to one-half acre (approximately 21,780 square feet) of lawn, garden, or landscaping. This is the outdoor water use provision. For context, half an acre of lawn in the high-desert Southern Utah climate requires roughly 60,000–90,000 gallons per year to maintain, depending on soil type and season.

3. Livestock Watering

Watering a small number of livestock for personal, non-commercial use. The statute does not specify an exact head count; the limiting factor is that all uses combined must stay within 0.5 acre-feet per year. A handful of horses, cattle, or a small flock of poultry is generally fine. A commercial livestock operation is not.

How to Apply: Step by Step

Applying for a domestic well exemption is straightforward and is done entirely through UDWR's online system. Here is the complete process:

1. Go to waterrights.utah.gov — this is UDWR's official portal for all water rights and well permit applications. Create an account if you do not already have one.
2. Select "Domestic Exemption Application" — this is a separate form from a standard well permit. The domestic exemption form is simpler and has no filing fee.
3. Provide the required information:
   • Property owner name and contact information
   • Parcel number or legal description of the property
   • County and township/range/section location
   • Proposed well location (GPS coordinates or map-based entry in the portal)
   • Intended uses (household, irrigation, livestock — check all that apply)
   • Estimated annual water use
4. Submit the application — there is no application fee for the domestic exemption.
5. Await UDWR review — standard domestic exemption applications are typically approved in two to four weeks. Processing can take longer in high-growth areas like Washington County where staff workloads are heavier.
6. Receive your exemption certificate — UDWR will issue a domestic exemption certificate that authorizes your well. Keep this document; you will need it.

Domestic Exemption vs. Full Water Right: Key Differences

The domestic exemption is not the same as a formal water right, and understanding the difference matters for your long-term property value and water security:

• No priority date: A formal water right has a priority date that determines your standing in times of shortage ("first in time, first in right"). A domestic exemption has no such seniority protection — in a severe drought scenario, holders of senior water rights are served first.
• No marketability: A formal water right can be sold, transferred, or leased independently of the land. A domestic exemption cannot; it is tied to the residential use of that specific parcel.
• No acreage beyond 0.5 acre irrigation: If you want to irrigate more than half an acre, you will need a separate water right for that additional use.
• No commercial use: Any commercial water use — from a home-based business that uses significant water to an agricultural operation — requires a separate water right.

For most rural homeowners in Southern Utah, these limitations are completely acceptable. The domestic exemption covers everything a typical single-family residence needs. If your property has larger water ambitions — a farm, a subdivision, a business — you will need to pursue a formal water right application in parallel or in addition to the exemption.

The Start Card: What It Is and Why You Need It

After receiving your domestic exemption (or a water right approval for larger projects), you must still obtain a well construction permit — commonly called a Start Card — from UDWR before any drilling begins. This is a separate document from the domestic exemption. The Start Card specifies the authorized well location, depth, casing requirements, and construction standards.

Drilling without a Start Card is illegal in Utah regardless of your water right or exemption status. The Start Card is what authorizes the physical act of well construction. It remains valid for two years from the date of issuance. If drilling is delayed beyond two years, you will need to request a renewal.

Geographic Management Area Restrictions

Some areas of Southern Utah are designated Groundwater Management Areas (GMAs), where UDWR has imposed additional restrictions on new water appropriations due to over-appropriation or aquifer stress. Key areas affecting Southern Utah well owners include:

• Washington County (Virgin River Basin): Parts of Washington County have restricted new full water right applications, but domestic exemptions are generally still available. Check with UDWR for the most current status of your specific parcel.
• Cedar Valley GMA (Iron County): The Cedar Valley area near Cedar City has an active GMA designation. New water rights in this area face significant scrutiny. Domestic exemptions remain available for genuine single-family residential uses.
• Escalante Valley GMA (Garfield/Iron County): This GMA covers parts of the Escalante Valley. Domestic exemptions are still available but review times may be longer.

The domestic exemption was intentionally designed to remain available even in areas with GMA restrictions, recognizing that individual homeowners have legitimate residential water needs regardless of broader aquifer management concerns. However, you should always confirm the current status with UDWR before starting your project.