Farmington, Utah Water Hardness & Water Softener Guide
Farmington’s water utility publishes a hardness of 8 to 10 grains per gallon depending on which side of 600 North you are on. Here is what that means for your plumbing and what it costs to treat.
Where Farmington’s water comes from
About 90% city wells, 10% Weber Basin. Source: farmington.utah.gov · live 2026
Is Farmington hard water?
At 8 to 10 grains per gallon depending on which side of 600 North you are on, Farmington sits in the hard band — above about 10.5 grains per gallon is very hard on the USGS scale. Scale shows up first inside the water heater, then on fixtures and glass. See the hardness scale.
Worth knowing: Farmington publishes two figures split at 600 North, and runs about 90 per cent city wells to 10 per cent Weber Basin water.
Scale builds inside the heater before it is visible anywhere else.
What Farmington’s hardness means in practice
Sizing is arithmetic once you have a number. At 10.0 grains per gallon — the top of that range, because a softener sized for the soft months lets hardness through in the hard ones — a household using the EPA average of more than 300 gallons a day sends roughly 3,000 grains of hardness through its plumbing every day. Over a year that is about 156 pounds of scale-forming calcium and magnesium passing through the water heater and the fixtures.
Against that load a 32,000-grain softener would regenerate roughly every 10.7 days and a 48,000-grain unit about every 16.0 days. Those are first estimates off the figure Farmington publishes, not a quote: your own use, any iron in the water, and whether you want softened water at the kitchen tap all move the answer, which is why we measure at your tap before sizing anything.
What CASA recommends in Farmington
A softener sized to Farmington’s published hardness is the first thing worth doing here. Add reverse osmosis at the sink for drinking water and whole-home carbon for chlorine.
Water hardness in nearby cities
Farmington water hardness FAQ
How hard is the water in Farmington, Utah? Farmington is published at 8 to 10 grains per gallon depending on which side of 600 North you are on. Source: farmington.utah.gov · live 2026
Where does Farmington get its drinking water? About 90% city wells, 10% Weber Basin.
Do I need a water softener in Farmington? Only your own reading answers that. We measure at the tap and size to what we find.
How do I find my exact hardness? A free water test at your own tap. We write the number down and size from it. What the bands mean.
Free Farmington water test
We measure your exact hardness and recommend the right system — no pressure, flat written quote.
