Uintah County Lake Quality
Utah, 15 lakes, average grade B (Good)
Uintah County's 15 monitored lakes fall in the moderate-density bracket for Utah. The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. 7 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. With an average grade of B, Uintah County sits comfortably above the Utah median.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Red Fleet Reservoir (A); the most-stressed is Matt Warner Reservoir E (D).
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Quick Answers for Uintah County
Planning a trip? Check special fishing regulations for Red Fleet Reservoir — or check the official Utah fishing regulations.
All Lakes in Uintah County
15 lakes · 7 graded, 8 not rated7 graded lakes · 8 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | ARed Fleet ReservoirUintah | A | 5.9 ft | 20 µg/L | 1.8 µg/L | No recent samples | ✓ Public |
| 2 | ABrough ReservoirUintah | A | 6.2 ft | 15.7 µg/L | 3.4 µg/L | No recent samples | Not recorded |
| 3 | ASteinaker ReservoirUintah | A | 8.9 ft | 18.3 µg/L | 3.8 µg/L | No recent samples | ✓ Public |
| 4 | BParadise Park ReservoirUintah | B | 7.9 ft | 13.3 µg/L | 2.2 µg/L | No recent samples | Not recorded |
| 5 | CCalder ReservoirUintah | C | 8.9 ft | 256 µg/L | 3.7 µg/L | No recent samples | ✓ Public |
| 6 | COaks Park ReservoirUintah | C | 3.3 ft | 20.5 µg/L | 2.5 µg/L | No recent samples | Not recorded |
| 7 | DMatt Warner Reservoir EUintah | D | 6.2 ft | 72 µg/L | 15.2 µg/L | No recent samples | Not recorded |
| NREast Park ReservoirUintah | NR | 4.6 ft | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRBottle Hallow ReservoirUintah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRTowave ReservoirUintah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRPariette East Dike ReservoirUintah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRBullock Draw ReservoirUintah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLong Park ReservoirUintah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRGull LakeUintah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRWhiterocks LakeUintah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
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Other Counties in Utah
See how Uintah County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: EPA National Aquatic Resource Surveys, 2026.