Green Lake vs Green Lake
Water quality, depth, fish species, and recreation comparison.
Green Lake has a higher water quality grade (A, Excellent) than Green Lake (B, Good). Both are in Green Lake County, Wisconsin.
Green Lake and Green 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. The grades are close: Green Lake (A) and Green Lake (B) 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.
Green Lake
Good clarity, visible to about 13.5 ft.
Green Lake
No clarity data.
Side-by-Side Metrics
| Metric | Green Lake | Green Lake |
|---|---|---|
| Overall Grade | A (Excellent) | B (Good) |
| Water Clarity | 13.5 ft | No data |
| Phosphorus | 38.1 µg/L | 20.6 µg/L |
| Chlorophyll-a (Algae) | 4.4 µg/L | No data |
| Maximum Depth | 236 ft | 236 ft |
| Surface Area | 7,920 acres | 7,920 acres |
| Public Access | Yes | Yes |
| Fish Species | 7 | 7 |
| Trophic State | mesotrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Green Lake wins on overall water quality with a Grade A versus Green Lake's Grade B. For fishing diversity, Green Lake also leads with 7 species.
Source: EPA National Aquatic Resource Surveys, 2026.