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LakeQuality

Milan Lake North vs Unionville Lake

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

Milan Lake North has a higher water quality grade (B, Good) than Unionville Lake (F, Very Poor). Both are in Wisconsin.

Milan Lake North and Unionville 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 meaningfully apart: Milan Lake North grades a B while Unionville Lake grades a F. That two-letter spread reflects real underlying differences — different watershed inputs, different depth profiles, or different monitoring rigor.

For a recreational visitor, the wider grade gap is decisive — Milan Lake North is the better water-quality choice. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?

B

Milan Lake North

Sullivan County, Wisconsin

No clarity data.

F

Unionville Lake

Putnam County, Wisconsin

Very murky, less than 1.6 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.

MetricMilan Lake NorthUnionville Lake
Overall GradeB (Good)F (Very Poor)
Water ClarityNo data1.6 ft
Phosphorus51.8 µg/L129.5 µg/L
Chlorophyll-a (Algae)7.8 µg/L57.5 µg/L
Maximum Depth--
Surface Area15 acres75 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophichypereutrophic

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

Verdict

Milan Lake North wins on overall water quality with a Grade B versus Unionville Lake's Grade F. For fishing diversity, Milan Lake North also leads with 0 species.