Magna, Utah Water Hardness & Water Softener Guide
Magna’s water utility publishes a hardness of 96.8 mg/L as calcium carbonate (about 5.7 gpg). Here is what that means for your plumbing and what it costs to treat.
Where Magna’s water comes from
Ten wells in two well fields plus supplemental JVWCD. Source: magnawater.myruralwater.com · 2025
Is Magna hard water?
At 96.8 mg/L as calcium carbonate (about 5.7 gpg), Magna sits in the moderately 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.
What Magna’s hardness means in practice
Sizing is arithmetic once you have a number. At 5.7 grains per gallon — the published figure — a household using the EPA average of more than 300 gallons a day sends roughly 1,710 grains of hardness through its plumbing every day. Over a year that is about 89 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 18.7 days and a 48,000-grain unit about every 28.1 days. Those are first estimates off the figure Magna 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. And at this end of the scale a softener may not be the right answer at all — under about 7 grains per gallon the USGS calls the water moderately hard or softer, and filtration for taste may be all that is worth doing. We will say so if that is what the reading shows.
What CASA recommends in Magna
A softener sized to Magna’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
Magna water hardness FAQ
How hard is the water in Magna, Utah? Magna is published at 96.8 mg/L as calcium carbonate (about 5.7 gpg). Source: magnawater.myruralwater.com · 2025
Where does Magna get its drinking water? Ten wells in two well fields plus supplemental JVWCD.
Do I need a water softener in Magna? 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 Magna water test
We measure your exact hardness and recommend the right system — no pressure, flat written quote.
