Farm Lake vs Sand Lake
Water quality, depth, fish species, and recreation comparison.
Farm Lake has a higher water quality grade (A, Excellent) than Sand Lake (C, Fair). Both are in Lake County, Minnesota.
Both Farm Lake and Sand 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. The grades are meaningfully apart: Farm Lake grades a A while Sand Lake grades a C. That two-letter spread reflects real underlying differences — different watershed inputs, different depth profiles, or different monitoring rigor.
For a recreational visitor, the wider grade gap is decisive — Farm 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?
Farm Lake
Murky, only visible to about 5.5 ft.
Sand Lake
Murky, only visible to about 4.1 ft.
Side-by-Side Metrics
| Metric | Farm Lake | Sand Lake |
|---|---|---|
| Overall Grade | A (Excellent) | C (Fair) |
| Water Clarity | 5.5 ft | 4.1 ft |
| Phosphorus | 15 µg/L | 22 µg/L |
| Chlorophyll-a (Algae) | 4.7 µg/L | 8 µg/L |
| Maximum Depth | 56 ft | 11 ft |
| Surface Area | 1,292 acres | 486 acres |
| Public Access | Yes | Yes |
| Fish Species | 12 | 9 |
| Trophic State | mesotrophic | eutrophic |
Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).
Verdict
Farm Lake wins on overall water quality with a Grade A versus Sand Lake's Grade C. Water clarity: 5.5 ft vs 4.1 ft. For fishing diversity, Farm Lake also leads with 12 species.
Source: EPA National Aquatic Resource Surveys, 2026.