Comus Lake vs Delavan Lake
Water quality, depth, fish species, and recreation comparison.
Delavan Lake has a higher water quality grade (C, Fair) than Comus Lake (F, Very Poor). Both are in Walworth County, Wisconsin.
Comus Lake and Delavan Lake are both in Wisconsin — 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: Delavan Lake grades a C while Comus 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 — Delavan 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?
Comus Lake
Very murky, less than 1.5 ft of visibility.
Delavan Lake
Moderate clarity, visible to about 8 ft.
Side-by-Side Metrics
| Metric | Comus Lake | Delavan Lake |
|---|---|---|
| Overall Grade | F (Very Poor) | C (Fair) |
| Water Clarity | 1.5 ft | 8 ft |
| Phosphorus | 193 µg/L | 49.5 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | - | - |
| Surface Area | 164 acres | 2.1K acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | hypereutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Delavan Lake wins on overall water quality with a Grade C versus Comus Lake's Grade F. Water clarity: 8 ft vs 1.5 ft. For fishing diversity, Delavan Lake also leads with 0 species.