Balsam Lake vs Half Moon Lake
Water quality, depth, fish species, and recreation comparison.
Balsam Lake and Half Moon Lake both received the same overall water quality grade of B (Good). Both are in Polk County, Wisconsin.
Balsam Lake and Half Moon 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 — Balsam Lake (B) versus Half Moon 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.
Balsam Lake
Murky, only visible to about 6.6 ft.
Half Moon Lake
Crystal clear, you can see 15.3 ft down.
Side-by-Side Metrics
| Metric | Balsam Lake | Half Moon Lake |
|---|---|---|
| Overall Grade | B (Good) | B (Good) |
| Water Clarity | 6.6 ft | 15.3 ft |
| Phosphorus | 16.1 µg/L | 13.9 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 37 ft | 60 ft |
| Surface Area | 1,901 acres | 550 acres |
| Public Access | Yes | Yes |
| Fish Species | 4 | 4 |
| Trophic State | mesotrophic | oligotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Both lakes earn the same Grade B. The tiebreakers come down to clarity (Balsam Lake: 6.6 ft, Half Moon Lake: 15.3 ft) and what you want from the lake. Balsam Lake matches its peer on species count.
Source: EPA National Aquatic Resource Surveys, 2026.