What are mesotrophic lakes in Utah?

40 mesotrophic lakes in Utah. Moderate nutrients, good water quality.

What does mesotrophic mean?

Moderate nutrients, good water quality.

Mesotrophic Lakes in Utah

Mesotrophic lakes are the productive middle of the trophic scale — TSI between 40 and 50. Clear enough to be inviting, productive enough to support a strong fishery, with moderate phosphorus and a modest algal community that does not dominate the optical signal. 40 lakes in Utah sit in the mesotrophic band. About 0% are deep (50+ ft); the rest are shallower basins where watershed management keeps nutrients from pushing the system into eutrophy.

Mesotrophic lakes tend to grade B or C on our A–F scale — the productive-but-clear band lines up with the middle of the letter grades.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Wide Hollow Reservoir	Garfield	A	13.8 ft	-	46
2	Salem Pond	Utah	A	5.9 ft	-	47
3	Grantsville Reservoir	Tooele	A	5.9 ft	-	47
4	Gunlock Reservoir	Washington	A	4.6 ft	-	48
5	Dmad Reservoir N of Cut	Millard	A	0.7 ft	-	62
6	Gunnison Bend Reservoir	Millard	A	1.5 ft	-	57
7	Hyrum Reservoir	Cache	A	6.9 ft	-	44
8	Big Sand Wash Reservoir	Duchesne	A	10.7 ft	-	41
9	Brough Reservoir	Uintah	A	6.2 ft	-	46
10	Moon Lake	Duchesne	A	9.5 ft	-	41
11	Red Creek Reservoir	Duchesne	A	14.4 ft	-	44
12	Nine Mile Reservoir	Sanpete	A	9.3 ft	-	42
13	Steinaker Reservoir	Uintah	A	8.9 ft	-	45
14	Lake Powell Halls Xing	Kane	B	12.3 ft	-	42
15	Paradise Park Reservoir	Uintah	B	7.9 ft	-	42
16	Tibble Fork Reservoir	Utah	C	5.2 ft	-	49
17	Strawberry Lake	Wasatch	C	20 ft	-	39
18	Calder Reservoir	Uintah	C	8.9 ft	-	58
19	Mona Reservoir	Juab	C	2 ft	-	58
20	Upper Enterprise Reservoir	Washington	C	5.2 ft	-	52
21	East Canyon Reservoir	Morgan	C	13.8 ft	-	42
22	Lower Gooseberry Reservoir	Sanpete	C	7.4 ft	-	49
23	Navajo Lake	Kane	C	9.5 ft	-	41
24	Strawberry Reservoir Strawberry Bay T	Wasatch	C	16.4 ft	-	42
25	Minersville Reservoir	Beaver	C	2.6 ft	-	60
26	Porcupine Reservoir	Cache	C	8.5 ft	-	44
27	Smith And Morehouse Reservoir	Summit	C	7.5 ft	-	42
28	Oaks Park Reservoir	Uintah	C	3.3 ft	-	49
29	Upper Stillwater Reservoir	Duchesne	C	8.7 ft	-	42
30	Joes Valley Reservoir	Emery	C	11.2 ft	-	38
31	Sheep Creek Lake	Daggett	C	10.3 ft	-	44
32	Cleveland Lake	Emery	C	17.4 ft	-	38
33	Kolob Reservoir	Washington	C	10.5 ft	-	41
34	Dark Canyon Lake	San Juan	C	7.2 ft	-	47
35	Three Creeks Reservoir	Beaver	C	6.6 ft	-	49
36	Electric Lake	Emery	D	10.8 ft	-	41
37	Strawberry Reservoir Indian Creek Bay T	Wasatch	D	16.4 ft	-	45
38	Browne Lake	Daggett	D	6.6 ft	-	51
39	Miller Flat Reservoir	Emery	D	10.2 ft	-	44
40	Anderson Meadow Reservoir	Beaver	D	10.2 ft	-	49

All mesotrophic lakes →Minnesota version →Wisconsin version →Illinois version →Michigan version →Iowa version →Ohio version →Pennsylvania version →New York version →Missouri version →Indiana version →North Dakota version →South Dakota version →Florida version →Colorado version →North Carolina version →Vermont version →Texas version →Oregon version →Arkansas version →Oklahoma version →Kansas version →Nebraska version →Nevada version →Arizona version →Idaho version →Montana version →New Mexico version →Tennessee version →Alabama version →Virginia version →Kentucky version →Washington version →Wyoming version →Georgia version →Massachusetts version →Ontario version →Québec version →Nova Scotia version →British Columbia version →Newfoundland and Labrador version →All Utah lakes →

Source: EPA National Aquatic Resource Surveys, 2026.