Julia Lake vs Little Turtle Lake
Water quality, depth, fish species, and recreation comparison.
Julia Lake reads lower on nutrients and algae than Little Turtle Lake. Both are in Beltrami County, Minnesota.
Julia Lake and Little Turtle 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. Julia Lake reads materially cleaner than Little Turtle Lake on nutrients and algae. 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 gap in the readings is decisive: Julia 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?
Julia Lake
Moderate clarity, visible to about 9.2 ft.
Little Turtle Lake
Murky, only visible to about 6.5 ft.
Side-by-Side Metrics
| Metric | Julia Lake | Little Turtle Lake |
|---|---|---|
| Water Clarity | 9.2 ft Better | 6.5 ft |
| Phosphorus | 21 µg/L Better | 23.5 µg/L |
| Chlorophyll-a (Algae) | 4.5 µg/L Better | 12 µg/L |
| Maximum Depth | 43 ft Better | 25 ft |
| Surface Area | 511 acres | 469 acres |
| Public Access | Yes | No |
| Fish Species | 10 | 15 Better |
| Trophic State | mesotrophic | eutrophic |
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.
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Verdict
Julia Lake reads lower on nutrients and algae than Little Turtle Lake. Water clarity: 9.2 ft vs 6.5 ft. For more fish-species variety, Little Turtle Lake edges ahead with 15 documented species.
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Source: EPA National Aquatic Resource Surveys, 2026.