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LakeQuality

Lamar City Lk. Nr. Dam Lake vs Lamar City Lk. South Arm Lake

Water quality, depth, fish species, and recreation comparison.

Lamar City Lk. Nr. Dam Lake and Lamar City Lk. South Arm Lake both received the same overall water quality grade of F (Very Poor). Both are in Barton County, Wisconsin.

Lamar City Lk. Nr. Dam Lake and Lamar City Lk. South Arm Lake are both in Missouri — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. The grades are close: Lamar City Lk. Nr. Dam Lake (F) and Lamar City Lk. South Arm Lake (F) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.

With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.

F

Lamar City Lk. Nr. Dam Lake

Barton County, Wisconsin

Very murky, less than 2 ft of visibility.

F

Lamar City Lk. South Arm Lake

Barton County, Wisconsin

Very murky, less than 2.1 ft of visibility.

Side-by-Side Metrics

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

MetricLamar City Lk. Nr. Dam LakeLamar City Lk. South Arm Lake
Overall GradeF (Very Poor)F (Very Poor)
Water Clarity2 ft2.1 ft
Phosphorus66 µg/L80.4 µg/L
Chlorophyll-a (Algae)39.1 µg/L39 µg/L
Maximum Depth--
Surface Area150 acres150 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophiceutrophic

Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).

Verdict

Both lakes earn the same Grade F. The tiebreakers come down to clarity (Lamar City Lk. Nr. Dam Lake: 2 ft, Lamar City Lk. South Arm Lake: 2.1 ft) and what you want from the lake. Lamar City Lk. Nr. Dam Lake matches its peer on species count.