What is the cleanest lake in Winston County, Alabama?

Smiw Lake in Winston County is the highest-rated lake in Winston County, Alabama with an EPA water quality grade of A and 11.5 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 Winston County, Alabama

Smiw Lake in Winston County leads the rankings with a water quality grade of A and 11.5 ft of clarity. Below are the top 3 cleanest monitored lakes in Winston County, Alabama, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Smiw Lake	Winston	A	11.5 ft	8 µg/L	2.7 µg/L
2	Brushy Creek Lake	Winston	NR	-	-	-
3	Verlie Barton Lake One	Winston	NR	-	-	-

Ranked List

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