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LakeQuality
D

Pine County Lake Quality

Minnesota, 20 lakes, average grade D (Nutrient-rich)

Pine County's 20 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. On average, Pine County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.

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 Net Lake (C); the most-stressed is Pokegama Lake (F).

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Quick Answers for Pine County

Cleanest lakes in Pine County →Cleanest lakes in Minnesota →Safest swimming lakes in Minnesota →

Planning a trip? Check special fishing regulations for Net Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Minnesota regulations index.

Fishing in Pine County

Pine County Fishing Guide

Fish species and best-graded lakes in Pine County

DNR Reports (40)

Minnesota DNR LakeFinder resources for lakes in Pine County. browse all reports →

These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).

All Lakes in Pine County

20 lakes · 3 graded, 17 not rated3 graded lakes · 17 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicMax DepthAccess
1CNet LakePineC3 ft36.5 µg/L12.4 µg/LNo recent samples15 ft✓ Public
2DBig Pine LakePineD4.6 ft19 µg/L20 µg/LNo recent samples25 ft✓ Public
3FPokegama LakePineF2 ft170 µg/L46.8 µg/LNo recent samples25 ft✓ Public
NRLong LakePineNR6.5 ftNo recent samplesNo recent samplesNo recent samples24 ft✓ Public
NRFish LakePineNR6 ftNo recent samplesNo recent samplesNo recent samples18 ftCarry-in
NRSand LakePineNR10 ftNo recent samplesNo recent samplesNo recent samples47 ft✓ Public
NRBass LakePineNR8.3 ftNo recent samplesNo recent samplesNo recent samples24 ft✓ Public
NRIsland LakePineNR7 ftNo recent samplesNo recent samplesNo recent samples42 ft✓ Public
NRRhine LakePineNR2.5 ftNo recent samplesNo recent samplesNo recent samples8 ftCarry-in
NROak LakePineNR4 ftNo recent samplesNo recent samplesNo recent samples20 ft✓ Public
NRRush LakePineNR12.8 ftNo recent samplesNo recent samplesNo recent samples37 ftCarry-in
NRDago LakePineNR12.8 ftNo recent samplesNo recent samplesNo recent samples20 ft✓ Public
NRSturgeon LakePineNR17 ftNo recent samplesNo recent samplesNo recent samples40 ft✓ Public
NRFox LakePineNR3.7 ftNo recent samplesNo recent samplesNo recent samples14.5 ftCarry-in
NREleven LakePineNR11 ftNo recent samplesNo recent samplesNo recent samples49 ftCarry-in
NRJohnson LakePineNR11.3 ft11 µg/L2.4 µg/LNo recent samplesNo recent samplesCarry-in
NRSturgeon LakePineNR16.8 ftNo recent samplesNo recent samplesNo recent samples40 ft✓ Public
NRGreigs LakePineNR12.6 ftNo recent samplesNo recent samplesNo recent samples68 ft✓ Public
NRPassenger LakePineNR8 ftNo recent samplesNo recent samplesNo recent samples22 ft✓ Public
NRLords LakePineNRNo recent samplesNo recent samplesNo recent samplesNo recent samples42 ft✓ Public

NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.

Lake Match

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Other Counties in Minnesota

Clay County

2 lakes · Avg grade A

Morrison County

16 lakes · Avg grade A

Hubbard County

76 lakes · Avg grade A

Cass County

130 lakes · Avg grade A

Cook County

139 lakes · Avg grade A

Crow Wing County

121 lakes · Avg grade A

See how Pine County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 39 states and 2 Canadian provinces.

Source: EPA National Aquatic Resource Surveys, 2026.