What are hypereutrophic lakes in Nebraska?

22 hypereutrophic lakes in Nebraska. Very high nutrients, dense algae, poor clarity.

What does hypereutrophic mean?

Very high nutrients, dense algae, poor clarity.

Hypereutrophic Lakes in Nebraska

Hypereutrophic lakes (TSI above 70) are at the upper end of the productivity scale: visible algal blooms most weeks of summer, clarity often under 3 feet, and meaningful risk of harmful-algal-bloom toxin events. 22 hypereutrophic lakes are on the Nebraska books. Almost none of them are deep — 0% break 50 feet. Shallow basin plus heavy nutrient input is the consistent recipe.

Hypereutrophic lakes overwhelmingly grade D or F — the trophic class and the grade are measuring closely-related dimensions of the same underlying nutrient regime.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Merritt Reservoir	Cherry	B	2 ft	-	73
2	Pelican Lake	Cherry	B	1.2 ft	-	77
3	Smith Lake	Sheridan	B	1.7 ft	-	75
4	Crescent Lake	Garden	B	0.8 ft	-	77
5	Goose Lake	Holt	B	1 ft	-	73
6	Swan Lake	Holt	B	1.8 ft	-	71
7	Pibel Lake	Wheeler	C	2 ft	-	80
8	Maskenthine Reservoir	Stanton	F	2.1 ft	-	71
9	Lone Star Reservoir	Fillmore	F	2.1 ft	-	77
10	Willow Creek Reservoir	Sarpy	F	1.5 ft	-	71
11	Swan Creek Lake	Saline	F	1.5 ft	-	80
12	Summit Lake	Burt	F	2.6 ft	-	67
13	Rockford Lake	Gage	F	1.7 ft	-	74
14	Liberty Cove Lake	Webster	F	2.2 ft	-	74
15	Big Indian Lake	Gage	F	1.5 ft	-	74
16	Grove Lake	Antelope	F	2.1 ft	-	70
17	Hedgefield Lake	Lancaster	F	1.6 ft	-	79
18	Meadowlark Lake	Seward	F	1.8 ft	-	73
19	Burchard Lake	Pawnee	F	1.9 ft	-	71
20	Buckskin Hills Lake	Dixon	F	2.4 ft	-	65
21	Wildwood Lake	Lancaster	F	1.7 ft	-	75
22	Ravenna Lake E of Ravenna	Buffalo	F	-	-	66

All hypereutrophic 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 →Nevada version →Arizona version →Idaho version →Montana version →New Mexico version →Tennessee version →Alabama version →Virginia version →Kentucky version →Utah version →Washington version →Wyoming version →Georgia version →Massachusetts version →Ontario version →Québec version →Nova Scotia version →British Columbia version →Newfoundland and Labrador version →All Nebraska lakes →

Source: EPA National Aquatic Resource Surveys, 2026.