8.0 at Big Cottonwood.
33.4 in the wells.
Salt Lake City publishes hardness by source, and the spread is the widest on this list. Big Cottonwood plant water is 8.0 grains per gallon, Parleys 10.2, City Creek 12.4 — while city wells and springs run 9.6 to 33.4. More than 60 percent is mountain stream water, but deep wells come online in summer and push well-served neighborhoods much harder.
- We measure your real grains-per-gallon on site
- Right-sized system tuned for Salt Lake City water
- Licensed install & lifetime workmanship warranty
What Salt Lake City actually publishes about its water
Taken from the water utility's own reporting — not from a competitor's service-area page, and not estimated.
- Published hardnessby source: Big Cottonwood plant 8.0, Parleys plant 10.2, City Creek plant 12.4; city wells and springs 9.6-33.4
- Where the water comes fromover 60% mountain stream water; deep wells added in summer, which raises hardness in well-served areas
- Who published itcity
- Source documentwww.slc.gov · 2025
- Hardness scaleThe USGS classifies water above 180 mg/L as calcium carbonate (about 10.5 grains per gallon) as very hard, 121 to 180 mg/L as hard, and 61 to 120 mg/L as moderately hard. USGS
We publish the utility's own figures and link them so you can check us. Your tap is still what counts — hardness moves with the source and the season — so we measure before we size anything.
Right-sized softening for Salt Lake City
We measure your actual Salt Lake City hardness and household use, then install a system tuned for Utah water — no guesswork, no upsell.
Metered Softener
Demand-initiated regeneration — it only cycles when you’ve actually used the capacity. Maximum salt and water efficiency for your Salt Lake City home.
See metered systems →Utah-Tough Resin
High-capacity, fouling-resistant resin built to take on Salt Lake City’s mineral-heavy, sediment-laden water for years.
Why resin matters →Pro Installation
Licensed, insured, code-compliant install with a bypass loop — backed by a lifetime workmanship warranty.
How install works →Summer wells change the answer
Over 60 percent of Salt Lake City's water is mountain stream water, but deep wells get added in summer and that raises hardness sharply in well-served neighborhoods. Same house, different number in August than in February.
End the hard-water war in Salt Lake City.
We come to your Salt Lake City home, test your water, and size the right softener. Then we install it right — once.
Proudly serving Salt Lake City and the Wasatch Front — Salt Lake City, Sandy, Draper, Lehi and beyond.
