Bowstring Lake vs Shallow Lake
Water quality, depth, fish species, and recreation comparison.
Shallow Lake reads lower on nutrients and algae than Bowstring Lake. Both are in Itasca County, Minnesota.
Bowstring Lake and Shallow Lake are both in Minnesota — 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 readings are meaningfully apart: Shallow Lake carries clearly lower phosphorus and chlorophyll-a readings than Bowstring 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: Shallow 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?
Bowstring Lake
Moderate clarity, visible to about 8 ft.
Shallow Lake
Crystal clear, you can see 16.4 ft down.
Side-by-Side Metrics
| Metric | Bowstring Lake | Shallow Lake |
|---|---|---|
| Water Clarity | 8 ft | 16.4 ft Better |
| Phosphorus | 38.5 µg/L | 9 µg/L Better |
| Chlorophyll-a (Algae) | 12.5 µg/L | 3.2 µg/L Better |
| Maximum Depth | 32 ft | 85 ft Better |
| Surface Area | 9,528 acres | 539 acres |
| Public Access | Yes | Yes |
| Fish Species | 17 Better | 12 |
| Trophic State | eutrophic | oligotrophic |
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 Bowstring Lake or Shallow Lake against a different lake.
Verdict
Shallow Lake reads lower on nutrients and algae than Bowstring Lake. Water clarity: 16.4 ft vs 8 ft. For more fish-species variety, Bowstring Lake edges ahead with 17 documented species.
Source: EPA National Aquatic Resource Surveys, 2026.