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LakeQuality

Of the 6 lakes within 30 miles of it with nutrient and algae readings on record, none reads lower than Mark Twain Lake Indian Creek Arm, so Mark Twain Lake Indian Creek Arm 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

LakeCountyGradeDistanceClarity
Mark Twain Lake Indian Creek ArmRalls CountyThis lake3.8 ft
Mark Twain Lake Indian Creek ArmRalls County2.8 mi3.8 ft
Mark Twain Lake Indian Creek ArmRalls County2.8 mi3.8 ft
Mark Twain Lake Indian Creek ArmRalls County4.4 mi3.8 ft
Mark Twain Lake Indian Creek ArmRalls County9.1 mi3.8 ft
Hunnewell LakeShelby County14.6 mi3.2 ft
Vandalia Community LakeAudrain County22.5 mi1.8 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 Mark Twain Lake Indian Creek Arm only with neighbouring lakes in Missourithat 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.