Beaver Lake vs Green Lake
Water quality, depth, fish species, and recreation comparison.
Beaver Lake has a higher water quality grade (C, Fair) than Green Lake (D, Poor). Both are in Wisconsin.
Beaver Lake and Green Lake are both in North Dakota — 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. The grades are close: Beaver Lake (C) and Green Lake (D) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.
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.
Beaver Lake
Very murky, less than 1.4 ft of visibility.
Green Lake
Murky, only visible to about 4.9 ft.
Side-by-Side Metrics
| Metric | Beaver Lake | Green Lake |
|---|---|---|
| Overall Grade | C (Fair) | D (Poor) |
| Water Clarity | 1.4 ft | 4.9 ft |
| Phosphorus | No data | No data |
| Chlorophyll-a (Algae) | 4.8 µg/L | No data |
| Maximum Depth | - | - |
| Surface Area | 953.1 acres | 906 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
Beaver Lake wins on overall water quality with a Grade C versus Green Lake's Grade D. Water clarity: 1.4 ft vs 4.9 ft. For fishing diversity, Beaver Lake also leads with 0 species.