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LakeQuality
C

Aitkin County Lake Quality

Minnesota, 53 lakes, average grade C (Fair)

Aitkin County has 53 graded lakes, enough that within-county variation matters as much as the county average. Some are deep glacial basins, others are shallow agricultural-watershed waters, and the grade distribution reflects that mix. Aitkin County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.

Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Round Lake (A) is the cleanest in the county.

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DNR Reports (150)

Minnesota DNR LakeFinder resources for lakes in Aitkin County. Showing 12 most recent — browse all reports →

All Lakes in Aitkin County

RankLakeGradeClarityMax DepthPhosphorus
1Round LakeA15.3 ft59 ft-
2Clear LakeA16 ft24 ft-
3Big Pine LakeA16.5 ft78 ft15 µg/L
4Lone LakeA22.7 ft60 ft-
5Sugar LakeA15.5 ft45 ft9.5 µg/L
6Ml-Seventeen LakeA18.8 ft42 ft24.5 µg/L
7Round LakeA14.5 ft125 ft11 µg/L
8Cedar LakeA11 ft105 ft10 µg/L
9Nord LakeA10.5 ft29 ft19 µg/L
10Ml-Nw LakeB18.8 ft42 ft24 µg/L
11Ml-Ce LakeB25.6 ft42 ft25 µg/L
12Ml-Nshore LakeB21.5 ft42 ft24.5 µg/L
13Ml-Ne LakeB24.2 ft42 ft24 µg/L
14Round LakeB14.5 ft27 ft-
15Long LakeB10.8 ft116 ft-
16Bachelor LakeB14.5 ft47 ft-
17Mille Lacs LakeB10.5 ft42 ft-
18Wilkins LakeB13 ft39 ft-
19Vanduse LakeB11 ft27 ft-
20Hammal LakeB12 ft44 ft-
21Farm Island LakeB10.5 ft56 ft-
22Spirit LakeB11 ft46 ft-
23Dam LakeB12 ft48 ft-
24Landgren LakeB13 ft47 ft-
25Ml-Ditch 36 LakeB11.9 ft42 ft23.5 µg/L
26Ml-Garrison LakeB12.5 ft42 ft26 µg/L
27Cedar LakeC8.8 ft18 ft-
28Big Sandy LakeC4.5 ft84 ft29.5 µg/L
29Brown LakeC7 ft28 ft-
30Rabbit LakeC9.7 ft51 ft-
31Waukenabo LakeC8 ft38 ft-
32Wakefield LakeC7.6 ft69 ft-
33Blackface LakeC8 ft18 ft-
34Gun LakeC7 ft44 ft-
35Pine LakeC6.6 ft28 ft30 µg/L
36Horseshoe LakeD3.5 ft12 ft-
37Bass LakeD5 ft58 ft-
38Portage LakeD4.5 ft18 ft-
39Blind LakeD5.5 ft17 ft-
40Minnewawa LakeD5.2 ft21 ft-
41Fleming LakeD5.2 ft15 ft-
42Hanging Kettle LakeD6.3 ft35 ft-
43Wolf LakeD3.5 ft31 ft-
44Esquagamah LakeD5 ft31 ft-
45Flowage LakeD2.1 ft-55 µg/L
46Rat LakeD5 ft21 ft-
47Elm Island LakeD4 ft25 ft-
48Loon LakeD4 ft21 ft-
49Ripple LakeD4.5 ft39 ft-
50Porcupine LakeD1.5 ft-51 µg/L
51Shumway LakeD5 ft23 ft-
52Davis LakeD1.6 ft21 ft75 µg/L
53Steamboat LakeF2.3 ft21 ft-

Source: EPA National Aquatic Resource Surveys, 2026.