St. George, Utah Water Hardness & Water Softener Guide
St. George has hard water at about 16 grains per gallon — here is what that means for your home and how to fix it.
Where St. George’s water comes from
St. George’s water comes primarily from Virgin River, Quail Creek & Sand Hollow reservoirs and wells. As that water moves through Utah’s mineral-rich geology it picks up calcium and magnesium — the minerals that make water hard and leave scale behind.
Is 16 grains per gallon hard?
Yes. Water above 7 gpg is considered hard, so St. George at 16 gpg is hard — well above the national average. Hard water shortens the life of water heaters and appliances, spots dishes and glass, clogs fixtures, and dries skin and hair.
What CASA recommends in St. George
A water softener is recommended to cut scale and protect your appliances. For drinking and cooking, pair it with a reverse-osmosis system, and add whole-home carbon filtration to remove chlorine taste and odor at every tap.
Water hardness in nearby cities
St. George water hardness FAQ
How hard is the water in St. George, Utah? About 16 grains per gallon, which is hard.
Do I need a water softener in St. George? A water softener is recommended to cut scale and protect your appliances.
Where does St. George get its drinking water? Virgin River, Quail Creek & Sand Hollow reservoirs and wells.
How do I find my exact hardness? Book a free CASA water test, or use our free water calculators and statewide hardness map.
Free St. George water test
We measure your exact hardness and recommend the right system — no pressure, flat written quote.