What are mesotrophic lakes in Wyoming?

21 mesotrophic lakes in Wyoming. Moderate nutrients, good water quality.

What does mesotrophic mean?

Moderate nutrients, good water quality.

Mesotrophic Lakes in Wyoming

Most well-managed working lakes register as mesotrophic — the band that balances productivity with clarity. 21 lakes in Wyoming 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 sit in the middle of the phosphorus and chlorophyll-a range: productive but still clear, with readings that rarely reach the EPA's poorest condition class.

#	Lake	County	Clarity	Depth	TSI
1	Alcova Reservoir Transitional Pelagic	Natrona	11.3 ft	-	45
2	Alcova Reservoir Lacustrine Pelagic	Natrona	12.8 ft	-	44
3	Seminoe Reservoir Transitional Pelagic	Carbon	11.4 ft	-	45
4	Wheatland Reservoir	Platte	8.9 ft	-	46
5	Keyhole Reservoir	Crook	7.7 ft	-	48
6	Lake Owen	Albany	8.1 ft	-	42
7	Sibley Lake	Sheridan	9.2 ft	-	41
8	Park Reservoir	Sheridan	10.8 ft	-	40
9	Lake Hattie	Albany	8.4 ft	-	42
10	Upper New Fork Lake	Sublette	10.5 ft	-	40
11	Healy Reservoir	Johnson	15.3 ft	-	43
12	Bell Reservoir	Albany	10.3 ft	-	40
13	Jordan Reservoir	Platte	5 ft	-	46
14	Lower North Crow Reservoir	Laramie	9.4 ft	-	46
15	Lower Sunshine Reservoir	Park	10.6 ft	-	40
16	Frye Lake	Fremont	8.4 ft	-	42
17	Lake Absarraca	Laramie	3.4 ft	-	48
18	Deaver Reservoir -D	Park	-	-	47
19	Sawmill Reservoir D	Sheridan	-	-	47
20	Upper North Crow Reservoir	Laramie	-	-	47
21	Rawlins Peaking Reservoir	Carbon	-	-	47

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 →Utah version →Washington version →Georgia version →Massachusetts version →Ontario version →Québec version →Nova Scotia version →British Columbia version →Newfoundland and Labrador version →All Wyoming lakes →

Source: EPA National Aquatic Resource Surveys, 2026.