Is Utah tap water hard or soft?
Yes, mostly. 93 % of the 14 cities with published data in Utah have hard or very hard water (over 120 mg/L). The median is 10.9 gpg, from 6.9 gpg in South Salt Lake to 37.5 gpg in Herriman.
We have published hardness data for 14 cities in Utah. The median is 10.9 gpg; the hardest water is in Herriman (37.5 gpg), the softest in South Salt Lake (6.9 gpg).
93 % of these cities have hard or very hard water (over 120 mg/L).
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Cities in Utah, hardest first
| gpg | mg/L | ||
|---|---|---|---|
| Herriman | 37.5 | 642 | very hard |
| St. George | 18.6 | 319 | very hard |
| Orem | 16 | 274 | very hard |
| Kaysville | 13.5 | 231 | very hard |
| Hyrum | 12.7 | 217 | very hard |
| Murray | 11.3 | 194 | very hard |
| Bluffdale | 11.1 | 189 | very hard |
| West Jordan | 10.7 | 183 | very hard |
| West Valley City | 10.3 | 176 | hard |
| Millcreek | 10.2 | 175 | hard |
| Salt Lake City | 10.2 | 175 | hard |
| South Jordan | 8.5 | 146 | hard |
| Saratoga Springs | 8.3 | 142 | hard |
| South Salt Lake | 6.9 | 118 | moderately hard |
FAQ
Is Utah water hard or soft?
Yes, mostly. 93 % of the 14 cities we cover have hard or very hard water; the median is 10.9 gpg.
Which city in Utah has the hardest water?
Herriman, at 37.5 gpg, has the hardest water of the 14 cities with published data.
Which city in Utah has the softest water?
South Salt Lake, at 6.9 gpg, has the softest water of the 14 cities with published data.
Do I need a water softener in Utah?
Above about 120 mg/L (7 gpg) scale builds up in water heaters, kettles and dishwashers, and a softener or at least regular descaling pays off. Look up your own city in the table: in Utah the values range from 6.9 gpg to 37.5 gpg.