What is the cleanest lake in Big Horn County, Wyoming?

Lovell Lakes in Big Horn County is the highest-rated lake in Big Horn County, Wyoming with an EPA water quality grade of NR.

How are these rankings calculated?

Lakes are graded A through F on nutrients and algae — total phosphorus, nitrogen, chlorophyll-a, and turbidity — against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown; it is not the letter. Lakes without enough recent samples are UNRATED, not given an F. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Big Horn County, Wyoming

Lovell Lakes in Big Horn County leads the rankings with a water quality grade of NR. Below are the top 20 cleanest monitored lakes in Big Horn County, Wyoming, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Lovell Lakes	Big Horn	NR	-	-	-
2	Lovell Lakes	Big Horn	NR	-	-	-
3	Adelaide Lake	Big Horn	NR	-	-	-
4	Shell Reservoir	Big Horn	NR	-	-	-
5	Emerald Lake	Big Horn	NR	-	-	-
6	Shell Lake	Big Horn	NR	-	-	-
7	Lake Elsa	Big Horn	NR	-	-	-
8	Mistymoon Lake	Big Horn	NR	-	-	-
9	Lake Helen	Big Horn	NR	-	-	-
10	Upper Crater Lake	Big Horn	NR	-	-	-
11	Crater Lake	Big Horn	NR	-	-	-
12	Upper Medicine Lodge Lake	Big Horn	NR	-	-	-
13	Lake Solitude	Big Horn	NR	-	-	-
14	West Tensleep Lake	Big Horn	NR	-	-	-
15	East Tensleep Lake	Big Horn	NR	-	-	-
16	Walters Reservoir	Big Horn	NR	-	-	-
17	Lower Medicine Lodge Lake	Big Horn	NR	-	-	-
18	Sandstone Reservoir	Big Horn	NR	-	-	-
19	Leavitt Reservoir	Big Horn	NR	-	-	-
20	Bethurem Reservoir	Big Horn	NR	-	-	-

Ranked List

More Answers for Big Horn County, Wyoming