Dutch Hollow Lake vs Lake Tomah
Water quality, depth, fish species, and recreation comparison.
Dutch Hollow Lake has a higher water quality grade (A, Excellent) than Lake Tomah (F, Very Poor). Both are in Wisconsin.
Dutch Hollow Lake and Lake Tomah 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. Dutch Hollow Lake (A) is materially cleaner than Lake Tomah (F). A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.
For a recreational visitor, the wider grade gap is decisive — Dutch Hollow 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?
Dutch Hollow Lake
Crystal clear, you can see 15 ft down.
Lake Tomah
No clarity data.
Side-by-Side Metrics
| Metric | Dutch Hollow Lake | Lake Tomah |
|---|---|---|
| Overall Grade | A (Excellent) | F (Very Poor) |
| Water Clarity | 15 ft | No data |
| Phosphorus | 13.1 µg/L | 140 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | - | - |
| Surface Area | 125 acres | 225 acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | oligotrophic | hypereutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Dutch Hollow Lake wins on overall water quality with a Grade A versus Lake Tomah's Grade F. For fishing diversity, Dutch Hollow Lake also leads with 0 species.