Utah County Lake Quality
Utah, 9 lakes, average grade C (Fair)
Utah County holds 9 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. 5 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. Utah County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
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 Silver Lake Flat Reservoir (A); the most-stressed is Utah Lake Sp @ Marina (F).
Where to stay near Utah County
Top-rated places to stay near Utah County
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Utah County?
Get lake water-quality report cards plus the best cabin & lodging deals near Utah County — straight to your inbox. No spam, unsubscribe anytime.
Quick Answers for Utah County
Planning a trip? Check special fishing regulations for Silver Lake Flat Reservoir — or check the official Utah fishing regulations.
All Lakes in Utah County
9 lakes · 5 graded, 4 not rated5 graded lakes · 4 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | ASilver Lake Flat ReservoirUtah | A | 10.5 ft | 9.9 µg/L | 1.1 µg/L | No recent samples | Not recorded |
| 2 | ASalem PondUtah | A | 5.9 ft | 16.2 µg/L | 3.9 µg/L | No recent samples | Not recorded |
| 3 | CTibble Fork ReservoirUtah | C | 5.2 ft | 23.6 µg/L | 3.5 µg/L | No recent samples | Not recorded |
| 4 | DBig East LakeUtah | D | 7.7 ft | 44 µg/L | 9 µg/L | No recent samples | Not recorded |
| 5 | FUtah Lake Sp @ MarinaUtah | F | 0.7 ft | 132 µg/L | 55.3 µg/L | No recent samples | ✓ Public |
| NRPondUtah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRWhite LakeUtah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRGoshen ReservoirUtah | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRSummit Creek Number Two ReservoirUtah | 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.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in Utah
See how Utah 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.