Alexander Lake vs Lake Mohawksin
Water quality, depth, fish species, and recreation comparison.
Lake Mohawksin has a higher water quality grade (C, Fair) than Alexander Lake (D, Poor). Both are in Lincoln County, Wisconsin.
Both Alexander Lake and Lake Mohawksin sit in Wisconsin. 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 close: Alexander Lake (D) and Lake Mohawksin (C) 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.
Alexander Lake
Murky, only visible to about 4 ft.
Lake Mohawksin
Murky, only visible to about 4 ft.
Side-by-Side Metrics
| Metric | Alexander Lake | Lake Mohawksin |
|---|---|---|
| Overall Grade | D (Poor) | C (Fair) |
| Water Clarity | 4 ft | 4 ft |
| Phosphorus | 46.2 µg/L | 34.7 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 36 ft | 25 ft |
| Surface Area | 618 acres | 1,515 acres |
| Public Access | Yes | Yes |
| Fish Species | 6 | 6 |
| Trophic State | eutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Lake Mohawksin wins on overall water quality with a Grade C versus Alexander Lake's Grade D. Water clarity: 4 ft vs 4 ft. For fishing diversity, Lake Mohawksin also leads with 6 species.
Source: EPA National Aquatic Resource Surveys, 2026.