Lake Nehai Tonkayea vs Thomas Hill Res. Nr. Dam Lake
Water quality, depth, fish species, and recreation comparison.
Lake Nehai Tonkayea has a higher water quality grade (B, Good) than Thomas Hill Res. Nr. Dam Lake (D, Poor). Both are in Wisconsin.
Lake Nehai Tonkayea and Thomas Hill Res. Nr. Dam 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. Lake Nehai Tonkayea (B) is materially cleaner than Thomas Hill Res. Nr. Dam Lake (D). 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 — Lake Nehai Tonkayea 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?
Lake Nehai Tonkayea
Moderate clarity, visible to about 8 ft.
Thomas Hill Res. Nr. Dam Lake
Very murky, less than 2.3 ft of visibility.
Side-by-Side Metrics
| Metric | Lake Nehai Tonkayea | Thomas Hill Res. Nr. Dam Lake |
|---|---|---|
| Overall Grade | B (Good) | D (Poor) |
| Water Clarity | 8 ft | 2.3 ft |
| Phosphorus | 10 µg/L | 61 µg/L |
| Chlorophyll-a (Algae) | 1.3 µg/L | 14.2 µg/L |
| Maximum Depth | - | - |
| Surface Area | 250 acres | 3.5K acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | oligotrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Lake Nehai Tonkayea wins on overall water quality with a Grade B versus Thomas Hill Res. Nr. Dam Lake's Grade D. Water clarity: 8 ft vs 2.3 ft. For fishing diversity, Lake Nehai Tonkayea also leads with 0 species.