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Rice County Lake Quality

Minnesota, 17 lakes, average grade F (Algae-prone)

Rice County's 17 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. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.

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. Kelly Lake (C) is the cleanest in the county.

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DNR Reports (33)

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

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

All Lakes in Rice County

17 lakes · 14 graded, 3 not rated14 graded lakes · 3 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicMax DepthAccess
1CKelly LakeRiceC8.2 ft29 µg/L7.7 µg/LNo recent samplesNo recent samples✓ Public
2DUnion LakeRiceD3 ft375 µg/L29.2 µg/LNo recent samples10 ft✓ Public
3DDudley LakeRiceD9 ft54 µg/L13.6 µg/LNo recent samples60 ftCarry-in
4FRoberds LakeRiceF2.5 ft300 µg/L86.7 µg/LNo recent samples43 ft✓ Public
5FCedar LakeRiceF2 ft91 µg/L72.6 µg/LNo recent samples42 ft✓ Public
6FCircle LakeRiceF1.5 ft484.5 µg/L59.7 µg/LNo recent samples14 ft✓ Public
7FFox LakeRiceF3 ft64 µg/L32.1 µg/LNo recent samples47 ft✓ Public
8FMazaska LakeRiceF2.5 ft89 µg/L51.3 µg/LNo recent samples50 ft✓ Public
9FFrench LakeRiceF1.7 ft134 µg/L46.3 µg/LNo recent samples56 ft✓ Public
10FWells LakeRiceF2 ft211 µg/L40.5 µg/LNo recent samples4 ft✓ Public
11FHunt LakeRiceF3 ft127 µg/L60.7 µg/LNo recent samples27 ft✓ Public
12FCannon LakeRiceF4.1 ft244 µg/L46.5 µg/LNo recent samples15 ft✓ Public
13FCody LakeRiceF2 ft346 µg/L103.5 µg/LNo recent samples14 ft✓ Public
14FPhelps LakeRiceF2.3 ft334.5 µg/L102.5 µg/LNo recent samples8 ft✓ Public
NRHorseshoe LakeRiceNR2 ftNo recent samplesNo recent samplesNo recent samples26 ft✓ Public
NRCrystal LakeRiceNRNo recent samples241 µg/L75.8 µg/LNo recent samplesNo recent samplesCarry-in
NRShields LakeRiceNR2.5 ftNo 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.

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See how Rice 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.