Water Treatment & Softeners in St. George, Utah

What is actually in St. George water

Start with the primary source rather than a sales brochure. The City of St. George publishes an annual Drinking Water Quality Report, and the 2025 edition gives the real numbers.

The city's water comes from two kinds of source: its own springs and wells drawing on the Navajo Sandstone and Kayenta Formation aquifers, and surface water purchased from the Washington County Water Conservancy District — Virgin River water stored in the Quail Creek and Sand Hollow reservoirs and treated at the Quail Creek Water Treatment Plant. With some exceptions, most customers in the city receive a mixture of the two during part of the year.

Both are mineral-heavy. The 2025 report puts total dissolved solids between 118 and 936 ppm across city groundwater sources, and at 552 to 580 ppm for the district's sources, against the Utah Division of Water Quality's 1,000 ppm threshold. Calcium is reported between 18 and 95 ppm.

Arsenic is worth understanding rather than fearing. It occurs naturally in the local geology, and the report is explicit that some individual sources can exceed 10 ppb while the city blends and treats water so that what reaches customers meets the EPA standard on a running annual average. The report also notes that the city does not add fluoride, and that its service line inventory determined all service lines to be non-lead.

A note on hardness numbers

You will find specific hardness figures for St. George quoted in grains per gallon on water-softener vendors' websites. The city's own 2025 report does not publish a hardness figure in those terms. Treat vendor numbers accordingly — and if you want a figure for your own address, have it tested at your tap, because the source blend varies by location and by season.

Choosing a system

• Get a test first, ideally one you commissioned rather than one bundled with a sales visit.
• Be clear what problem you are solving. Softening addresses hardness. Reverse osmosis addresses dissolved contaminants at a single tap. They are different jobs, and a quote covering both should say so.
• Ask about salt and wastewater volume, which matter in a water-scarce region.
• Ask what servicing costs over five years, not just what installation costs today.