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LakeQuality
D

Scott County Lake Quality

Minnesota, 17 lakes, average grade D (Poor)

Scott 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. On average, Scott 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 Krenz Lake (A); the most-stressed is Pike Lake (F).

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DNR Reports (31)

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

All Lakes in Scott County

RankLakeGradeClarityMax DepthPhosphorus
1Krenz LakeA16.2 ft--
2Deans LakeB--37 µg/L
3Lower Prior LakeB9.5 ft60 ft26.8 µg/L
4Central Mystic LakeB--42 µg/L
5Crystal LakeC8.5 ft26 ft-
6Spring LakeC7 ft37 ft41.9 µg/L
7Mccoll PondC8 ft11 ft-
8Fish LakeC3.9 ft28 ft53.2 µg/L
9Upper Prior LakeC6 ft50 ft32.7 µg/L
10Mill PondD6 ft18 ft-
11O'Dowd LakeD5 ft22 ft-
12Pike LakeF2 ft9 ft181.5 µg/L
13Cedar LakeF3.1 ft13 ft-
14Cleary LakeF2.3 ft9 ft172.9 µg/L
15Fisher LakeF0.7 ft--
16Mcmahon LakeF3 ft14 ft-
17East Arctic LakeF--94.5 µg/L

Source: EPA National Aquatic Resource Surveys, 2026.