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LakeQuality

Elmwood Lake vs Forest Lake

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

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

Both Elmwood Lake and Forest Lake sit in Missouri. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. The grades are meaningfully apart: Forest Lake grades a B while Elmwood 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 — Forest Lake 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?

F

Elmwood Lake

Sullivan County, Wisconsin

Very murky, less than 2.7 ft of visibility.

B

Forest Lake

Adair County, Wisconsin

Murky, only visible to about 4.1 ft.

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.

MetricElmwood LakeForest Lake
Overall GradeF (Very Poor)B (Good)
Water Clarity2.7 ft4.1 ft
Phosphorus70.8 µg/L18 µg/L
Chlorophyll-a (Algae)35.2 µg/L4.8 µg/L
Maximum Depth--
Surface Area224 acres646 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophicmesotrophic

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

Verdict

Forest Lake wins on overall water quality with a Grade B versus Elmwood Lake's Grade F. Water clarity: 4.1 ft vs 2.7 ft. For fishing diversity, Forest Lake also leads with 0 species.