When people move to the St. George area, they come for the red rock scenery, the 300 days of sunshine, and the relatively affordable land — often in rural areas outside the city limits where private wells are the only water option. What many do not fully consider is that Southern Utah is one of the most water-stressed regions in the United States, and Washington County is at the center of a growing tension between population growth and finite groundwater resources.

Understanding this context is not meant to discourage rural well ownership. It is essential background for making smart decisions about where you buy, what permits you need, and how to protect your water access for the long term.

The Growth Numbers Are Staggering

Washington County's population growth has been among the highest of any county in the United States for much of the past decade. The St. George metropolitan area grew by over 30% between 2010 and 2020, making it one of the nation’s fastest-growing metros. Utah's Governor's Office of Planning and Budget projects the county's population to more than double by 2060, from roughly 200,000 today to potentially 400,000–500,000 people.

Every person who moves to Washington County adds to the demand on a water system that was already operating close to its sustainable limits. The primary municipal water supply — the Virgin River and its groundwater-fed tributaries — is a fully allocated resource. The Washington County Water Conservancy District (WCWCD) has been working for decades on the Lake Powell Pipeline project as a future supply solution, but that project remains in regulatory and political limbo.

In the meantime, private well owners in the rural areas of the county are drawing from the same groundwater system that supports all this growth, and the data shows it is responding.

The Virgin River Basin Aquifer

The primary groundwater resource for the St. George area and surrounding Washington County communities is the Virgin River Basin aquifer system. This is not a single uniform aquifer but a complex of connected formations, principally:

  • The Navajo Sandstone — a deep, regionally extensive sandstone aquifer that provides most of the reliable groundwater in the area. Most residential wells in Washington County draw from this formation.
  • Alluvial aquifer — a shallower, more productive aquifer in the Virgin River valley bottom and some tributary valleys. More susceptible to surface contamination and seasonal fluctuation.
  • Fractured volcanic and limestone formations — minor local aquifers in various parts of the county with limited lateral extent.

UDWR monitoring data documents a long-term trend of declining water table levels in portions of the Virgin River Basin, particularly in the areas with the heaviest pumping near St. George, Washington City, and Hurricane. Some monitoring wells have shown static water level declines of 50–150 feet over the past 30 years — a significant change that has real consequences for well owners.

What Declining Aquifer Levels Mean for Well Owners

When a regional aquifer's water table declines, existing wells are affected in several ways:

Pump Depth May Become Inadequate

A well drilled in 1990 to 500 feet may have had the pump set at 450 feet with excellent water. If the static water level in that area has since dropped 100 feet, that pump may now be sitting very close to the current water table — or even above it. The result: air pulls, intermittent service, and potential pump damage. We see this situation increasingly in older Washington County wells in areas with heavy pumping nearby.

Arsenic Concentrations Can Increase

As water tables decline and remaining water must travel further through arsenic-bearing Navajo Sandstone before reaching a well intake, arsenic concentrations in affected wells can increase. This is not universal, but it has been observed in some areas of Washington County and is a reason to test arsenic more frequently — at least every two years — rather than just once at well completion.

New Well Depths Must Be Greater

A new well drilled in an area of documented aquifer decline must be drilled deeper than a well drilled at the same location 20 years ago. This directly increases drilling costs and is one reason why Washington County well costs have risen faster than inflation over the past decade.

The Role of WCWCD

The Washington County Water Conservancy District is the primary regional water planning authority for Washington County. Their mandate includes both managing existing water resources and planning for future supply. Key WCWCD activities that affect private well owners:

  • Aquifer monitoring network — WCWCD maintains monitoring wells that track water table levels throughout the county. This data is public and should be consulted before purchasing rural property.
  • Water right administration coordination — while UDWR is the actual regulatory authority, WCWCD provides significant input on groundwater appropriations in the county.
  • Conservation programs — WCWCD offers water conservation incentives and education programs for residential users, including well owners.
  • Future supply planning — WCWCD's long-term plans for supplemental water supply will ultimately affect the regional balance between supply and demand.

Getting a Well Permit Is Getting Harder

New full water right applications in the Virgin River Basin — covering most of Washington County — face increasing scrutiny from UDWR. Applications for new water rights in this basin can take years to process and may face objections from existing water rights holders. The basin is administratively over-appropriated in many areas, meaning paper water rights already exceed the sustainable yield of the aquifer.

This does not mean new wells are impossible — it means the path to authorization matters more than ever. The most important distinction:

  • Domestic well exemptions (under 0.5 acre-feet per year for a single-family home) remain generally available throughout Washington County, even in restricted areas. UDWR has not closed the domestic exemption for residential well owners.
  • Full water rights applications for larger quantities are subject to much more rigorous review in over-appropriated areas, and approval is not guaranteed even with a complete application.

For the typical rural Washington County homeowner, the domestic exemption continues to provide a viable path to a legal well. But the competitive landscape for larger water rights — for agricultural operations, subdivisions, or commercial uses — has become genuinely difficult.

Buying Rural Land in Washington County: What to Verify

⚠️ Critical Warning for Rural Property Buyers: Every year, people purchase rural Washington County property with the assumption that they will be able to drill a well, only to discover that the specific parcel has complications — a depth to water far exceeding estimates, a prior owner's water right that didn't transfer, or a location in an area where new appropriations face serious challenges. Verify water independently before you close. It is not the seller's agent's job to advise you on water law.

If you are purchasing rural property in Washington County that will depend on a private well, complete these steps before closing:

  1. Pull well completion reports for all wells within one mile of the property from UDWR's online database. Look at depths, yields, and static water levels. Are the data points trending in the right direction?
  2. Check whether a domestic exemption or water right is already associated with the parcel. UDWR's searchable database lets you look up water rights by parcel. An existing approved exemption is transferable with the land; an unapproved one is not.
  3. Consult with a licensed well driller who has recent drilling experience in that specific area of the county. A driller who has recently worked within a mile of the property can give you a realistic depth estimate and flag any known drilling challenges.
  4. Budget conservatively. A Washington County well that a seller estimates at "$20,000" based on a neighbor's well five years ago may actually cost $35,000–50,000+ today based on current depths, drilling conditions, and pump requirements.
  5. Consider a well yield test if an existing well is already on the property. A yield test establishes the well's sustainable production rate and can reveal problems not apparent from a casual inspection.

The Long-Term Outlook

The long-term water picture for Washington County is genuinely complex. Without a new major surface water import (like the contested Lake Powell Pipeline), the county faces a future of increasingly careful groundwater management, higher water costs, and potentially more restrictions on new appropriations.

For private well owners, this translates to several practical recommendations:

  • If you are planning to drill a new well, do it sooner rather than later — the regulatory environment for new water rights is unlikely to become more permissive over time
  • Invest in water efficiency: VFD pump systems, drip irrigation, and xeriscaping reduce your draw on the aquifer and lower operating costs
  • Monitor your static water level annually to detect aquifer decline in your local area early
  • Test for arsenic every two years rather than waiting for obvious signs of change
  • Maintain your well documentation meticulously — a documented, legally established water use is far easier to protect than an informal one

Buying Rural Property or Planning a New Well?

Utah Water Well Alliance helps Southern Utah homeowners navigate the permitting process, understand local geology, and get accurate cost estimates before committing to a project.