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LakeQuality
D

Adams County Lake Quality

Wisconsin, 2 lakes, average grade D (Poor)

Only 2 lakes in Adams 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. The county-wide average grade is D — water quality issues are persistent across most of the monitored basins. 1 lakes fall into the F bracket outright.

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. North Lemmon Lake (B) is the cleanest in the county.

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All Lakes in Adams County

RankLakeGradeClarityMax DepthPhosphorus
1North Lemmon LakeB5.7 ft--
2Mirror LakeF2.1 ft--

Source: EPA National Aquatic Resource Surveys, 2026.