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LakeQuality

Of the 4 lakes neighbouring it with nutrient and algae readings on record, none reads lower than Madison Lake, so Madison Lake is the cleanest measured water among its neighbours. Lakes nearby without enough recent sampling to earn a letter are not part of that comparison.

Reviewed by LakeQuality Editorial Team · Updated

The measured lakes it was measured against

LakeCountyDistanceClarity
Madison LakeBlue Earth CountyThis lake4 ft
Ballantyne LakeBlue Earth CountyNearby2.5 ft
George LakeBlue Earth CountyNearby2.2 ft
Washington LakeLe Sueur CountyNearby4.5 ft
Jefferson LakeLe Sueur CountyNearby2 ft

What the comparison covers

A grade on LakeQuality comes from EPA Water Quality Portal samples: phosphorus, nitrogen, chlorophyll-a and turbidity, measured against EPA National Lakes Assessment ecoregion classes. Secchi clarity is shown and is not scored. This page compares Madison Lake only with neighbouring lakes in Minnesotathat carry readings of their own. A nearby lake with too little recent sampling has no letter to compare, so it is absent from the table rather than ranked below. Where a driving distance is not published for a lake, the table says so instead of estimating one.