What is the cleanest lake in Arkansas?

Beaver Lake in Carroll County is the highest-rated lake in Arkansas with an EPA water quality grade of A and 20.3 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 Arkansas

Beaver Lake in Carroll County leads the rankings with a water quality grade of A and 20.3 ft of clarity. Below are the top 16 cleanest monitored lakes in Arkansas, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Beaver Lake	Carroll	A	20.3 ft	5 µg/L	1.2 µg/L
2	Lake Winona	Saline	A	7.2 ft	11 µg/L	2.1 µg/L
3	Beaver Lake	Benton	C	4.6 ft	23 µg/L	9.1 µg/L
4	Crown Lake	Izard	C	-	20 µg/L	2.3 µg/L
5	Driver Creek Lake	Van Buren	C	-	27 µg/L	13 µg/L
6	Lake Leatherwood	Carroll	C	-	26 µg/L	2.9 µg/L
7	Bobb Kidd Lake	Washington	D	-	42.5 µg/L	22.8 µg/L
8	Lake Wilson	Washington	D	-	20 µg/L	7.4 µg/L
9	Horsehead Lake	Johnson	D	-	30 µg/L	13.5 µg/L
10	Lee Creek Lake	Crawford	D	-	29.5 µg/L	10 µg/L
11	Lake Beulah	Desha	F	1 ft	300 µg/L	69.4 µg/L
12	Desoto Lake	Phillips	F	1.6 ft	75 µg/L	44.1 µg/L
13	Tunica Cutoff Lake	Lee	F	1.6 ft	150 µg/L	56.2 µg/L
14	Lake Charles	Lawrence	F	-	69.5 µg/L	40.9 µg/L
15	Lake Erling	Lafayette	F	-	50 µg/L	49.2 µg/L
16	Bois D Arc Lake	Hempstead	F	-	200 µg/L	137 µg/L

Ranked List

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