What is the cleanest lake in St. Louis County, Minnesota?

Burntside Lake in St. Louis County has the cleanest nutrient and algae readings in St. Louis County, Minnesota, with 16 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 St. Louis County, Minnesota

Burntside Lake in St. Louis County leads the rankings on measured clarity and nutrients and 16 ft of clarity. Below are the top 50 cleanest monitored lakes in St. Louis County, Minnesota, ranked on EPA nutrient and algae measurements.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Burntside Lake	St. Louis	16 ft	7 µg/L	2 µg/L
2	Bear Head Lake	St. Louis	11 ft	19.5 µg/L	3.6 µg/L
3	West Twin Lake	St. Louis	6.2 ft	18.5 µg/L	7.1 µg/L
4	Peary Lake	St. Louis	6.7 ft	20.2 µg/L	-
5	Sandy Lake	St. Louis	-	20.5 µg/L	-
6	Shoepack Lake	St. Louis	4.6 ft	19.8 µg/L	-
7	Little Sandy Lake	St. Louis	-	19 µg/L	-
8	Birch Lake	St. Louis	3.9 ft	21.5 µg/L	7.5 µg/L
9	Lost Lake	St. Louis	5.8 ft	110 µg/L	6.7 µg/L
10	Simian Lake	St. Louis	3.9 ft	33 µg/L	5.5 µg/L
11	Joe Martin Lake	St. Louis	14.5 ft	35.5 µg/L	2.3 µg/L
12	Heikkilla Lake	St. Louis	5 ft	24 µg/L	13.6 µg/L
13	Strand Lake	St. Louis	3.5 ft	44 µg/L	10.9 µg/L
14	Fishmouth Lake	St. Louis	-	-	-
15	McDivitt Lake	St. Louis	-	-	-
16	Weir Lake	St. Louis	-	-	-
17	Wiyapka Lake	St. Louis	-	-	-
18	Tooth Lake	St. Louis	-	-	-
19	Lucille Lake	St. Louis	-	-	-
20	Johnson Lake	St. Louis	-	-	-
21	Spring Lake	St. Louis	-	-	-
22	Franklin Lake	St. Louis	-	-	-
23	Marion Lake	St. Louis	-	-	-
24	Long Lake	St. Louis	-	-	-
25	Gannon Lake	St. Louis	-	-	-
26	Bluebird Lake	St. Louis	-	-	-
27	Moose Lake	St. Louis	-	-	-
28	Little Johnson Lake	St. Louis	-	-	-
29	Amundsen Lake	St. Louis	-	-	-
30	Corner Lake	St. Louis	-	-	-
31	Namakan Lake	St. Louis	-	-	-
32	Pearl Lake	St. Louis	-	-	-
33	Moose Lake	St. Louis	-	-	-
34	Bell Lake	St. Louis	-	-	-
35	Swan Lake	St. Louis	-	-	-
36	Chub Lake	St. Louis	-	-	-
37	South Bog Lake	St. Louis	-	-	-
38	Elephant Lake	St. Louis	-	-	-
39	Silver Lake	St. Louis	-	-	-
40	Bug Lake	St. Louis	-	-	-
41	Kjostad Lake	St. Louis	-	-	-
42	Clear Lake	St. Louis	-	-	-
43	Myrtle Lake	St. Louis	-	-	-
44	Carlson Lake	St. Louis	-	-	-
45	Olive Lake	St. Louis	-	-	-
46	Maude Lake	St. Louis	-	-	-
47	Picket Lake	St. Louis	-	-	-
48	Finstad Lake	St. Louis	-	-	-
49	Gustafson Lake	St. Louis	-	-	-
50	Bootleg Lake	St. Louis	-	-	-

Ranked List

More Answers for St. Louis County, Minnesota