Big Lake vs Drewery Lake
Water quality, depth, fish species, and recreation comparison.
Big Lake reads lower on nutrients and algae than Drewery Lake. Both are in Beltrami County, Minnesota.
Both Big Lake and Drewery Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any differences in the readings here are about the lakes themselves, not the agencies sampling them. The readings are meaningfully apart: Big Lake carries clearly lower phosphorus and chlorophyll-a readings than Drewery Lake. A spread that wide reflects real underlying differences, in watershed inputs, depth profiles, or monitoring rigor.
For a recreational visitor, the wider gap in the readings is decisive: Big Lake has the lower nutrient and algae numbers. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?
Big Lake
Moderate clarity, visible to about 9.7 ft.
Drewery Lake
Murky, only visible to about 3.5 ft.
Side-by-Side Metrics
| Metric | Big Lake | Drewery Lake |
|---|---|---|
| Water Clarity | 9.7 ft Better | 3.5 ft |
| Phosphorus | 15 µg/L | 11.5 µg/L Better |
| Chlorophyll-a (Algae) | 4.8 µg/L | 2.7 µg/L Better |
| Maximum Depth | 35 ft | 120 ft Better |
| Surface Area | 3,598 acres | 15,958 acres |
| Public Access | Yes | Yes |
| Fish Species | 17 | 21 Better |
| Trophic State | mesotrophic | mesotrophic |
A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.
Swap a lake
Compare Big Lake or Drewery Lake against a different lake.
Verdict
Big Lake reads lower on nutrients and algae than Drewery Lake. Water clarity: 9.7 ft vs 3.5 ft. For more fish-species variety, Drewery Lake edges ahead with 21 documented species.
Source: EPA National Aquatic Resource Surveys, 2026.