Billy Boy Flowage Lake vs Sand Lake
Water quality, depth, fish species, and recreation comparison.
Billy Boy Flowage Lake has a higher water quality grade (A, Excellent) than Sand Lake (B, Good). Both are in Sawyer County, Wisconsin.
Billy Boy Flowage Lake and Sand 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 — Billy Boy Flowage Lake (A) versus Sand Lake (B). 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.
Billy Boy Flowage Lake
No clarity data.
Sand Lake
Good clarity, visible to about 9.9 ft.
Side-by-Side Metrics
| Metric | Billy Boy Flowage Lake | Sand Lake |
|---|---|---|
| Overall Grade | A (Excellent) | B (Good) |
| Water Clarity | No data | 9.9 ft |
| Phosphorus | 15 µg/L | 23.8 µg/L |
| Chlorophyll-a (Algae) | No data | 3.5 µg/L |
| Maximum Depth | - | - |
| Surface Area | 8.5K acres | 928 acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | mesotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Billy Boy Flowage Lake wins on overall water quality with a Grade A versus Sand Lake's Grade B. For fishing diversity, Billy Boy Flowage Lake also leads with 0 species.