Diamond Lake vs Florida Lake
Water quality, depth, fish species, and recreation comparison.
Florida Lake has a higher water quality grade (A, Excellent) than Diamond Lake (D, Poor). Both are in Kandiyohi County, Minnesota.
Both Diamond Lake and Florida Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. Florida Lake (A) is materially cleaner than Diamond Lake (D). A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.
For a recreational visitor, the wider grade gap is decisive — Florida Lake is the better water-quality choice. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?
Diamond Lake
Murky, only visible to about 5.6 ft.
Florida Lake
Good clarity, visible to about 12.3 ft.
Side-by-Side Metrics
| Metric | Diamond Lake | Florida Lake |
|---|---|---|
| Overall Grade | D (Poor) | A (Excellent) |
| Water Clarity | 5.6 ft | 12.3 ft |
| Phosphorus | 65 µg/L | 20 µg/L |
| Chlorophyll-a (Algae) | 17.4 µg/L | 3.8 µg/L |
| Maximum Depth | 27 ft | 40 ft |
| Surface Area | 1,610 acres | 705 acres |
| Public Access | Yes | Yes |
| Fish Species | 15 | 18 |
| Trophic State | eutrophic | mesotrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Florida Lake wins on overall water quality with a Grade A versus Diamond Lake's Grade D. Water clarity: 12.3 ft vs 5.6 ft. For fishing diversity, Florida Lake also leads with 18 species.
Source: EPA National Aquatic Resource Surveys, 2026.