Water Quality · Utah
Best Water Quality Counties in Utah 2026
Ranked by EPA drinking water health violations.
Top 10 — Water Quality in Utah
Score reflects water quality only — not overall county quality.
All Utah Counties — Water Quality Rankings
29 counties ranked by water quality score. Overall Score shown for context.
| # | County | Water Quality Score | Overall Score |
|---|---|---|---|
| 1 | Beaver County, UT | 86 | 57.5 |
| 2 | Daggett County, UT | 86 | 74.2 |
| 3 | Juab County, UT | 86 | 56.5 |
| 4 | Sevier County, UT | 86 | 47.4 |
| 5 | Tooele County, UT | 86 | 41.5 |
| 6 | Uintah County, UT | 86 | 45.5 |
| 7 | Salt Lake County, UT | 70.4 | 35.3 |
| 8 | Davis County, UT | 68.2 | 49.1 |
| 9 | Utah County, UT | 64.4 | 49.6 |
| 10 | Box Elder County, UT | 55.4 | 44.6 |
| 11 | Carbon County, UT | 55.4 | 49.2 |
| 12 | Cache County, UT | 55.2 | 51.3 |
| 13 | Duchesne County, UT | 50.7 | 40.1 |
| 14 | Weber County, UT | 49.3 | 38.9 |
| 15 | Morgan County, UT | 42.4 | 57.5 |
| 16 | Sanpete County, UT | 42.2 | 54.6 |
| 17 | Emery County, UT | 35.1 | 70.1 |
| 18 | Washington County, UT | 35.1 | 46.8 |
| 19 | Summit County, UT | 34.2 | 52.6 |
| 20 | Kane County, UT | 31.6 | 58.8 |
| 21 | Iron County, UT | 30.2 | 46.9 |
| 22 | Grand County, UT | 26.8 | 48.5 |
| 23 | Wayne County, UT | 25.9 | 71.8 |
| 24 | San Juan County, UT | 22.8 | 58.3 |
| 25 | Wasatch County, UT | 20.9 | 55.9 |
| 26 | Piute County, UT | 18.8 | 68.1 |
| 27 | Garfield County, UT | 18.5 | 66.8 |
| 28 | Millard County, UT | 7.7 | 53.5 |
| 29 | Rich County, UT | 7 | 73.3 |