What is the cleanest lake in Cook County, Minnesota?

Clearwater Lake in Cook County has the cleanest nutrient and algae readings in Cook County, Minnesota, with 29 feet of measured water clarity.

How are these rankings calculated?

Nutrients and algae, total phosphorus, nitrogen, chlorophyll-a and turbidity, are read against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown separately. Lakes without enough recent samples are listed without a condition class rather than ranked low. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Cook County, Minnesota

Clearwater Lake in Cook County leads the rankings on measured clarity and nutrients and 29 ft of clarity. Below are the top 50 cleanest monitored lakes in Cook County, Minnesota, ranked on EPA nutrient and algae measurements.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Clearwater Lake	Cook	29 ft	4 µg/L	1.3 µg/L
2	Pike Lake	Cook	17.4 ft	7 µg/L	2.6 µg/L
3	West Twin Lake	Cook	9.8 ft	9 µg/L	3.5 µg/L
4	Trout Lake	Cook	18.4 ft	9 µg/L	1.3 µg/L
5	Gull Lake	Cook	15.5 ft	8.5 µg/L	2.5 µg/L
6	Caribou Lake	Cook	6.9 ft	15 µg/L	6.2 µg/L
7	Devil Track Lake	Cook	7 ft	12 µg/L	5.3 µg/L
8	Poplar Lake	Cook	10.2 ft	9 µg/L	3.3 µg/L
9	Deer Yard Lake	Cook	7.2 ft	15 µg/L	5.3 µg/L
10	Elbow Lake	Cook	3.7 ft	18.5 µg/L	4.8 µg/L
11	Hungry Jack Lake	Cook	18 ft	7 µg/L	2 µg/L
12	Tom Lake	Cook	9 ft	8 µg/L	4.1 µg/L
13	Tait Lake	Cook	7 ft	13 µg/L	3.3 µg/L
14	Sea Gull Lake	Cook	14.3 ft	7 µg/L	2.7 µg/L
15	Mayhew Lake	Cook	20.6 ft	5 µg/L	1.5 µg/L
16	Loon Lake	Cook	17.4 ft	5 µg/L	1.6 µg/L
17	Bearskin Lake	Cook	21 ft	6 µg/L	1.3 µg/L
18	Saganaga Lake	Cook	13 ft	7 µg/L	2.9 µg/L
19	Greenwood Lake	Cook	15.1 ft	10 µg/L	2.6 µg/L
20	East Twin Lake	Cook	6.2 ft	17 µg/L	7.9 µg/L
21	Lost Lake	Cook	-	-	-
22	Moosehorn Lake	Cook	-	-	-
23	Prout Lake	Cook	-	-	-
24	Otter Lake	Cook	-	-	-
25	Powers Lake	Cook	-	-	-
26	Tom Lake	Cook	-	-	-
27	Triangle Lake	Cook	-	-	-
28	Devilfish Lake	Cook	-	-	-
29	Highlander Lake	Cook	-	-	-
30	Tittle Lake	Cook	-	-	-
31	North Shady Lake	Cook	-	-	-
32	Sunfish Lake	Cook	-	-	-
33	Carrot Lake	Cook	-	-	-
34	Bean Lake	Cook	-	-	-
35	Cucumber Lake	Cook	-	-	-
36	Onion Lake	Cook	-	-	-
37	Jim Lake	Cook	-	-	-
38	Section Ten Lake	Cook	-	-	-
39	Redcoat Lake	Cook	-	-	-
40	Northern Light Lake	Cook	-	-	-
41	Mink Lake	Cook	-	-	-
42	Kimball Lake	Cook	-	-	-
43	Benson Lake	Cook	-	-	-
44	Pickerel Lake	Cook	-	-	-
45	Pine Mountain Lake	Cook	-	-	-
46	Mush Lake	Cook	-	-	-
47	Muckwa Lake	Cook	-	-	-
48	Musquash Lake	Cook	-	-	-
49	Circle Lake	Cook	-	-	-
50	Moses Lake	Cook	-	-	-

Ranked List

More Answers for Cook County, Minnesota