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LakeQuality

Of the 8 lakes within 30 miles of it with nutrient and algae readings on record, none reads lower than Three Mile Lake, so Three Mile Lake is the cleanest measured water in that radius. 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
Three Mile LakeUnion CountyThis lake2.7 ft
Twelve Mile LakeUnion County2.4 mi2.4 ft
Thayer LakeUnion County8.4 mi3.5 ft
Green Valley LakeUnion County9.1 mi1.5 ft
Mckinley LakeUnion County9.1 mi1 ft
Green Valley LakeUnion County9.3 mi1.5 ft
Summit LakeUnion County9.6 mi1.4 ft
Lake OrientAdair County14.5 mi1.3 ft
Fogle LakeRinggold County19.2 mi2.3 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 Three Mile Lake only with neighbouring lakes in Iowathat carry readings of their own, within 30 miles. 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.