State distribution
Hardness across indexed ZIPs
Counts describe published ZIP profiles, not a population-weighted statewide sample.
Soft · 0–60 PPM0
Moderately hard · 61–120 PPM0
Hard · 121–180 PPM0
Very hard · 181+ PPM66
State water index
Utah water hardness
Search 55 indexed communities and 66 ZIP profiles, then compare the underlying utility, source, distance, and reporting context.
Median indexed hardness
364PPM
Very Hard
Indexed range 257–686.5 PPM
- ZIP profiles
- 66
- Cities
- 55
- Matched utilities
- 55
- Counties
- 19
Understanding Utah
Why local comparisons matter here
Utah communities use mountain snowmelt and reservoirs as well as groundwater from valleys and arid basins across the Wasatch Front and beyond.
In this index, very hard is the largest category, covering 66 of 66 profiles with hardness data. The state median is 364 PPM, but the full indexed range is 257–686.5 PPM.
Evidence coverage
What the current records support
- Hardness estimate
- 100%
- Lead 90th percentile
- 100%
- Copper 90th percentile
- 2%
4
Low-confidence hardness profiles
4
Nearest site more than 25 miles away
Reported source water
Utility source mix
- Groundwater
- 29
- Surface water
- 23
- Groundwater influenced by surface water
- 3
Highest medians
Hardest indexed cities
- 1. Monroe687 PPM
- 2. East Carbon546 PPM
- 3. Manti546 PPM
- 4. Wellington500 PPM
- 5. Price499 PPM
Lowest medians
Softest indexed cities
- 1. Milford257 PPM
- 2. Lewiston264 PPM
- 3. Ivins266 PPM
- 4. Parowan274 PPM
- 5. Wendover283 PPM
City directory
Explore Utah by city
Search by city or county, then sort by name, hardness, or ZIP coverage.
55 cities · 66 ZIP profiles
55 cities found
Page 1 of 3
Aurora
Sevier County · 1 ZIP
359PPM
Single indexed valueNo active flag
Beaver
Beaver County · 1 ZIP
284PPM
Single indexed valueNo active flag
Bluffdale
Salt Lake County · 1 ZIP
450PPM
Single indexed valueNo active flag
Bountiful
Davis County · 1 ZIP
477PPM
Single indexed valueNo active flag
Coalville
Summit County · 1 ZIP
296PPM
Single indexed valueNo active flag
Delta
Millard County · 1 ZIP
342PPM
Single indexed valueNo active flag
Duchesne
Duchesne County · 1 ZIP
391PPM
Single indexed valueNo active flag
Eagle Mountain
Utah County · 1 ZIP
496PPM
Single indexed valueNo active flag
East Carbon
Carbon County · 2 ZIPs
546PPM
Single indexed valueNo active flag
Ephraim
Sanpete County · 1 ZIP
344PPM
Single indexed valueNo active flag
Fairview
Sanpete County · 1 ZIP
357PPM
Single indexed valueNo active flag
Fillmore
Millard County · 1 ZIP
342PPM
Single indexed valueNo active flag
Fountain Green
Sanpete County · 1 ZIP
358PPM
Single indexed valueNo active flag
Genola
Utah County · 1 ZIP
337PPM
Single indexed valueNo active flag
Grantsville
Tooele County · 1 ZIP
334PPM
Single indexed valueNo active flag
Gunnison
Sanpete County · 1 ZIP
357PPM
Single indexed valueNo active flag
Herriman
Salt Lake County · 1 ZIP
450PPM
Single indexed valueNo active flag
Hurricane
Washington County · 1 ZIP
293PPM
Single indexed valueNo active flag
Ivins
Washington County · 1 ZIP
266PPM
Single indexed valueNo active flag
Kanab
Kane County · 1 ZIP
311PPM
Single indexed valueNo active flag
Kaysville
Davis County · 1 ZIP
477PPM
Single indexed valueNo active flag
La Verkin
Washington County · 1 ZIP
294PPM
Single indexed valueNo active flag
Layton
Davis County · 2 ZIPs
477PPM
Single indexed valueNo active flag
Lehi
Utah County · 1 ZIP
494PPM
Single indexed valueNo active flag
County comparison
Highest indexed county medians
| County | Median | Range | ZIP profiles |
|---|---|---|---|
| Carbon County | 523 PPM | 499–546 | 4 |
| Salt Lake County | 481 PPM | 450–494 | 8 |
| Davis County | 477 PPM | 477–477 | 6 |
| Weber County | 401 PPM | 325–477 | 2 |
| Duchesne County | 391 PPM | 391–391 | 1 |
| Utah County | 379 PPM | 326–496 | 15 |
| Sevier County | 363 PPM | 330–686.5 | 4 |
| Sanpete County | 358 PPM | 344–546 | 6 |
| Juab County | 356 PPM | 356–356 | 1 |
| Millard County | 342 PPM | 342–342 | 2 |
| Cache County | 335 PPM | 264–361 | 3 |
| Tooele County | 327 PPM | 283–334 | 3 |