What is the cleanest lake in La Crosse County, Wisconsin?

Neshonoc Lake in La Crosse County is the highest-rated lake in La Crosse County, Wisconsin 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 La Crosse County, Wisconsin

Neshonoc Lake in La Crosse County leads the rankings with a water quality grade of NR. Below are the top 3 cleanest monitored lakes in La Crosse County, Wisconsin, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Neshonoc Lake	La Crosse	NR	-	-	-
2	Lake Onalaska	La Crosse	NR	-	-	-
3	Van Loon Lake	La Crosse	NR	-	-	-

Ranked List

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