Big Round Deep Hole South Lake vs Big Round Lake
Water quality, depth, fish species, and recreation comparison.
Big Round Lake has a higher water quality grade (C, Fair) than Big Round Deep Hole South Lake (D, Poor). Both are in Polk County, Wisconsin.
Big Round Deep Hole South Lake and Big Round 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. These two are within a letter of each other on the rubric — Big Round Deep Hole South Lake (D) versus Big Round Lake (C). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
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.
Big Round Deep Hole South Lake
Murky, only visible to about 4.9 ft.
Big Round Lake
Murky, only visible to about 4.9 ft.
Side-by-Side Metrics
| Metric | Big Round Deep Hole South Lake | Big Round Lake |
|---|---|---|
| Overall Grade | D (Poor) | C (Fair) |
| Water Clarity | 4.9 ft | 4.9 ft |
| Phosphorus | No data | 27.6 µg/L |
| Chlorophyll-a (Algae) | No data | 21 µg/L |
| Maximum Depth | 17 ft | 17 ft |
| Surface Area | 1.0K acres | 1.0K acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | eutrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Big Round Lake wins on overall water quality with a Grade C versus Big Round Deep Hole South Lake's Grade D. Water clarity: 4.9 ft vs 4.9 ft. For fishing diversity, Big Round Lake also leads with 0 species.