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 PPM2
Very hard · 181+ PPM61
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 regional evidence
348PPM
Very Hard
Indexed range 164–552 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 61 of 63 profiles with hardness data. The state median is 348 PPM, but the full indexed range is 164–552 PPM.
Evidence coverage
What the current records support
- Hardness estimate
- 95%
- Lead 90th percentile
- 100%
- Copper 90th percentile
- 2%
6
Low-confidence hardness profiles
43
Research-comparison eligible profiles
Reported source water
Utility source mix
- Groundwater
- 29
- Surface water
- 23
- Groundwater influenced by surface water
- 3
Highest medians
Highest eligible city medians
Lowest medians
Lowest eligible city medians
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
448PPM regional
Single regional valueNo active flag
Beaver
Beaver County · 1 ZIP
215PPM regional
Single regional valueNo active flag
Bluffdale
Salt Lake County · 1 ZIP
379PPM regional
Single regional valueNo active flag
Bountiful
Davis County · 1 ZIP
307PPM regional
Single regional valueNo active flag
Coalville
Summit County · 1 ZIP
—
No regional sampleNo active flag
Delta
Millard County · 1 ZIP
385PPM regional
Single regional valueNo active flag
Duchesne
Duchesne County · 1 ZIP
—
No regional sampleNo active flag
Eagle Mountain
Utah County · 1 ZIP
494PPM regional
Single regional valueNo active flag
East Carbon
Carbon County · 2 ZIPs
546PPM regional
Single regional valueNo active flag
Ephraim
Sanpete County · 1 ZIP
377PPM regional
Single regional valueNo active flag
Fairview
Sanpete County · 1 ZIP
284PPM regional
Single regional valueNo active flag
Fillmore
Millard County · 1 ZIP
405PPM regional
Single regional valueNo active flag
Fountain Green
Sanpete County · 1 ZIP
377PPM regional
Single regional valueNo active flag
Genola
Utah County · 1 ZIP
321PPM regional
Single regional valueNo active flag
Grantsville
Tooele County · 1 ZIP
287PPM regional
Single regional valueNo active flag
Gunnison
Sanpete County · 1 ZIP
364PPM regional
Single regional valueNo active flag
Herriman
Salt Lake County · 1 ZIP
477PPM regional
Single regional valueNo active flag
Hurricane
Washington County · 1 ZIP
266PPM regional
Single regional valueNo active flag
Ivins
Washington County · 1 ZIP
266PPM regional
Single regional valueNo active flag
Kanab
Kane County · 1 ZIP
367PPM regional
Single regional valueNo active flag
Kaysville
Davis County · 1 ZIP
423PPM regional
Single regional valueNo active flag
La Verkin
Washington County · 1 ZIP
334PPM regional
Single regional valueNo active flag
Layton
Davis County · 2 ZIPs
488PPM regional
Regional range 423–552No active flag
Lehi
Utah County · 1 ZIP
406PPM regional
Single regional valueNo active flag
County comparison
Highest regional-evidence county medians
| County | Median | Range | ZIP profiles |
|---|---|---|---|
| Utah County | 477 PPM | 286–496 | 15 |
| Juab County | 477 PPM | 477–477 | 1 |
| Davis County | 423 PPM | 307–552 | 6 |
| Sevier County | 395 PPM | 287–471 | 4 |
| Millard County | 395 PPM | 385–404.5 | 2 |
| Kane County | 367 PPM | 367–367 | 1 |
| Sanpete County | 356 PPM | 284–377 | 6 |
| Carbon County | 355 PPM | 164–546 | 4 |
| Salt Lake County | 336 PPM | 307–477 | 8 |
| Tooele County | 327 PPM | 287–366.5 | 3 |
| San Juan County | 304 PPM | 303.5–303.5 | 1 |
| Cache County | 290 PPM | 254.5–290 | 3 |