Why St. George and Southwest Utah Are Turning to Wastewater Reuse

Water in Southwest Utah is no longer easy to come by.

Local leaders say the region must now rely on wastewater reuse to meet future demand because traditional water sources are already stretched thin. In simple terms, the cheap water is gone.

A New Approach to Water in Washington County

At the Confluence Park Water Reclamation Facility near St. George, wastewater is being transformed into a reusable resource.

This facility uses a biological treatment process where bacteria remove pollutants from sewage. The method, originally developed overseas, is being used in Utah for the first time.

Once fully operational, the plant will clean wastewater and send reclaimed water to lawns, parks, and public spaces in nearby communities like Hurricane and Toquerville. Eventually, some of that water will be stored to support the county’s broader water supply.

Why Reuse Is Becoming Essential

Washington County faces several challenges at once.

The Virgin River is essentially maxed out, droughts are more common, and the region is projected to add tens of thousands of new residents over the next two decades.

Because of that, recycling wastewater has become a core part of the county’s long-term water plan. Officials say reuse could provide more than half of the additional water needed through the early 2040s.

“We live in the desert,” local water managers explain. “Water is too scarce to use just once.”

Unlike snowpack or river flows, wastewater is reliable. As long as people live and work here, there will be water to recycle.

Built for Growth

The Confluence Park facility is designed with the future in mind.

Right now, nearby homes and businesses use about 500,000 gallons of water per day. The plant can handle three times that amount, allowing it to support growth for decades.

The first phase of the county’s reuse system focuses on outdoor use, freeing up higher-quality water for drinking. Later phases could treat wastewater to even higher standards, allowing it to return directly to the drinking supply.

The Cost of Securing Water

While wastewater reuse offers long-term benefits, it is not cheap.

The Confluence Park project alone cost about $50 million. Altogether, Washington County’s regional reuse system is expected to cost around $1.6 billion.

Funding comes from a mix of state loans, federal grants, and impact fees on new development. Federal support has played a key role, although delays and administrative pauses slowed some funding in recent years.

Despite the cost, officials say reuse may actually save money long term by reducing the need to import water from distant sources.

What This Means for the Region

Wastewater reuse gives Washington County more control over its water future.

It supports growth, protects against drought, and helps ensure that homes, businesses, and recreation areas have water even as the region expands.

For Southwest Utah, this shift is not optional.
It is the next chapter in living responsibly in a desert.

Connect With STG Direct

More local stories and updates here