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LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water
F

Barton County Lake Quality

Missouri, 1 lake, average grade F (Algae-prone)

Barton County holds 1 monitored lake. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. Every one of those lake carries an A–F grade, so the county-level summary covers the full set rather than a monitored subset. The county average is F — the most-stressed bracket in our rubric. Most monitored lakes here show persistent nutrient loading and algal pressure.

The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Lamar City Lk. East Arm Lake (F); the most-stressed is Lamar City Lk. East Arm Lake (F).

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All Lakes in Barton County

1 lake1 graded lake

#LakeGradeClarityPhosphorusAlgaeTrophicAccess
1FLamar City Lk. East Arm LakeBartonF1.9 ft72.3 µg/L32.1 µg/LNo recent samplesNot recorded

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Source: EPA National Aquatic Resource Surveys, 2026.