What are eutrophic lakes in Nevada?

9 eutrophic lakes in Nevada. High nutrients, frequent algae, reduced clarity.

What does eutrophic mean?

High nutrients, frequent algae, reduced clarity.

Eutrophic Lakes in Nevada

Eutrophic lakes — TSI 50 to 70 — are nutrient-rich and productive, with persistent summer algal communities that drive visible reductions in clarity. These conditions are not failures; they reflect a lake doing what nutrient-loaded waters do. 9 Nevada lakes register as eutrophic. Only 0% are deep — eutrophy correlates with shallowness, agricultural watersheds, and the kind of nutrient-input history that takes decades to shift.

Eutrophic lakes typically grade C or D on our A–F scale. The same nutrient richness that defines the trophic class drives the lower grade.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Boulder Reservoir	Washoe	C	-	-	61
2	Onion Valley Reservoir @ Dam	Humboldt	C	-	-	53
3	Squaw Creek Reservoir	Washoe	C	-	-	63
4	Spooner Lake	Douglas	C	-	-	62
5	Walker Lake	Mineral	D	4.7 ft	-	69
6	Sheep Creek Lake	Elko	D	6.2 ft	-	59
7	Billy Shaw Lake	Elko	D	-	-	56
8	Mountain View Lake	Elko	D	-	-	58
9	Bilk Creek Reservoir	Humboldt	D	-	-	51

All eutrophic 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 →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 Nevada lakes →

Source: EPA National Aquatic Resource Surveys, 2026.