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LakeQuality
C

Lucas County Lake Quality

Wisconsin, 2 lakes, average grade C (Fair)

Only 2 lakes in Lucas County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. Lucas 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. Er60 Lake (C) is the cleanest in the county.

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All Lakes in Lucas County

RankLakeGradeClarityMax DepthPhosphorus
1Er60 LakeC9.8 ft--
2Er59 LakeD6.6 ft--

Source: EPA National Aquatic Resource Surveys, 2026.