City Millpond vs Green Lake
Water quality, depth, fish species, and recreation comparison.
City Millpond and Green Lake both received the same overall water quality grade of C (Fair). Both are in Green Lake County, Wisconsin.
City Millpond 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. These two are within a letter of each other on the rubric — City Millpond (C) versus Green 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.
City Millpond
No clarity data.
Green Lake
Good clarity, visible to about 11.5 ft.
Side-by-Side Metrics
| Metric | City Millpond | Green Lake |
|---|---|---|
| Overall Grade | C (Fair) | C (Fair) |
| Water Clarity | No data | 11.5 ft |
| Phosphorus | 38.4 µg/L | 66.5 µg/L |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 236 ft | 236 ft |
| Surface Area | 7.9K acres | 7.9K 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
Both lakes earn the same Grade C. The tiebreakers come down to what you want from the lake. City Millpond matches its peer on species count.