What is the cleanest lake in Buena Vista County, Iowa?

Storm Lake Max Depth in Buena Vista County is the highest-rated lake in Buena Vista County, Iowa with an EPA water quality grade of B and 1.7 feet of water clarity.

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 Buena Vista County, Iowa

Storm Lake Max Depth in Buena Vista County leads the rankings with a water quality grade of B and 1.7 ft of clarity. Below are the top 4 cleanest monitored lakes in Buena Vista County, Iowa, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Storm Lake Max Depth	Buena Vista	B	1.7 ft	123.5 µg/L	11 µg/L
2	Newell Pit Lake	Buena Vista	B	4.1 ft	37 µg/L	11.9 µg/L
3	Gustafson Lake	Buena Vista	D	2.3 ft	48.2 µg/L	27 µg/L
4	Pickerel Lake	Buena Vista	NR	-	-	-

Ranked List

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