St. George is the one city on this list where the average tap water is above the EPA’s 500 mg/L secondary guideline for dissolved solids. It is also the farthest from the AMPAC factory, roughly 300 miles south of Woods Cross. AMPAC installs and services systems on site anywhere in Utah, so distance changes the scheduling, not the answer. This page covers what the city reports and what fits.
What is in St. George tap water?
| Provider | Hardness (grains/gal) | Hardness (mg/L) | TDS (mg/L) | Report |
|---|---|---|---|---|
| St. George City | not published | not published | 552 - 580 average, range 118 - 936 | 2025 |
An average of 552 to 580 mg/L is over the 500 mg/L line the EPA sets for taste and appearance. It is not a health limit. The practical effect is mineral or salty taste, spotting on glassware and faster scale on anything that heats water. The range, 118 to 936 mg/L, is the widest in our sources, so the reading at your address could be much lower or much higher than the average. St. George does not publish a hardness figure, which means the only way to size a softener is to test the tap.
These are system-wide figures from each utility’s own annual water quality report. A specific street can differ from the average, so test your tap before you size anything. Hardness is unregulated, so a utility that does not publish a number is not breaking a rule. 1 grain per gallon is 17.1 mg/L.
What this means for your equipment
- Drinking water and ice: reverse osmosis is the direct fix for high TDS. See residential RO systems for tap units.
- Hotels, restaurants and car washes: spotting and scale are the costs. Commercial RO systems supply low-TDS water for rinse, ice and cooking. See water treatment for restaurants.
- Brackish wells and process water: if a source tests above 1,000 mg/L, it is brackish by definition. See brackish water RO and brackish water desalination in Utah.
- Hardness: test it before you buy. RO vs water softener explains when you need one, the other or both.
Installation and service for St. George
AMPAC builds its reverse osmosis systems at 2262 S 1200 W, Suite #103, Woods Cross, UT 84087, roughly 300 miles away. AMPAC installs and services systems on site anywhere in Utah. The people who assemble a system are the ones you talk to about it. For a job this far south, ask about scheduling when you call. For parts and equipment you would rather collect, pick them up at the Woods Cross facility. Everything else ships.
- Call (385) 530-1026 to arrange an installation, a service visit or a pickup time
- Request a quote and include your address, daily water use and, if you have one, a recent water test
- Size a system first with the RO system calculators
Frequently asked questions
Is St. George tap water high in TDS?
Yes, relative to the EPA’s 500 mg/L secondary guideline. The city’s 2025 report gives an average of 552 to 580 mg/L, with readings from 118 to 936 mg/L. The guideline is about taste and appearance, not safety.
Does St. George publish its water hardness?
No. The 2025 report gives TDS but no hardness figure. Test your tap or call the city if you need one.
Do I need RO or a softener in St. George?
High TDS is what reverse osmosis treats, so RO is the stronger match for drinking and process water. A softener only addresses hardness, which you would need to measure first. Many sites end up with both.
Does AMPAC install this far south?
AMPAC installs and services systems on site anywhere in Utah, and St. George is about 300 miles from the Woods Cross facility. Call (385) 530-1026 to talk through scheduling for your site.
More on Utah water
- Water treatment in Utah: the statewide guide, with wells, drought and parts
- Utah water hardness and TDS by city: every provider with a source link
- How to test your home water quality