What is the cleanest lake in Bear Lake County, Idaho?

Montpelier Reservoir in Bear Lake County is the highest-rated lake in Bear Lake County, Idaho 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 Bear Lake County, Idaho

Montpelier Reservoir in Bear Lake County leads the rankings with a water quality grade of NR. Below are the top 2 cleanest monitored lakes in Bear Lake County, Idaho, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Montpelier Reservoir	Bear Lake	NR	-	-	-
2	Merkley Lake	Bear Lake	NR	-	-	-

Ranked List

More Answers for Bear Lake County, Idaho