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LakeQuality
C

Pine County Lake Quality

Minnesota, 19 lakes, average grade C (Fair)

Pine County's 19 graded lakes fall in the moderate-density bracket for Minnesota. The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. Pine 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.

The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Sturgeon Lake (A); the most-stressed is Pokegama Lake (F).

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DNR Reports (53)

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

All Lakes in Pine County

RankLakeGradeClarityMax DepthPhosphorus
1Sturgeon LakeA16 ft40 ft-
2Sturgeon LakeA55 ft--
3Johnson LakeA11.3 ft-11 µg/L
4Sand LakeB10 ft47 ft-
5Rush LakeB12.8 ft37 ft-
6Dago LakeB12.8 ft20 ft-
7Eleven LakeB11 ft49 ft-
8Greigs LakeB12.6 ft68 ft-
9Bass LakeC8.3 ft24 ft-
10Island LakeC7 ft42 ft-
11Passenger LakeC8 ft22 ft-
12Big Pine LakeC4.3 ft25 ft21 µg/L
13Long LakeD5.7 ft24 ft-
14Fish LakeD6 ft18 ft-
15Oak LakeD3.8 ft20 ft-
16Net LakeD3 ft15 ft33 µg/L
17Fox LakeD3.7 ft14.5 ft-
18Pokegama LakeF2 ft25 ft170 µg/L
19Rhine LakeF2.5 ft8 ft-

Source: EPA National Aquatic Resource Surveys, 2026.