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Julia Lake reads lower on nutrients and algae than Campbell Lake. Both are in Beltrami County, Minnesota.

Reviewed by LakeQuality Editorial Team · Updated

Both Campbell Lake and Julia 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. Julia Lake reads materially cleaner than Campbell 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?

Campbell Lake

Beltrami County, Minnesota

Moderate clarity, visible to about 6.7 ft.

Julia Lake

Beltrami County, Minnesota

Moderate clarity, visible to about 9.2 ft.

Side-by-Side Metrics

MetricCampbell LakeJulia Lake
Water Clarity6.7 ft9.2 ft Better
Phosphorus21.5 µg/L21 µg/L Better
Chlorophyll-a (Algae)8.4 µg/L4.5 µg/L Better
Maximum Depth25 ft43 ft Better
Surface Area463 acres511 acres
Public AccessYesYes
Fish Species14 Better10
Trophic Statemesotrophicmesotrophic

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.

Verdict

Julia Lake reads lower on nutrients and algae than Campbell Lake. Water clarity: 9.2 ft vs 6.7 ft. For more fish-species variety, Campbell Lake edges ahead with 14 documented species.

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Source: EPA National Aquatic Resource Surveys, 2026.