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Shallow Lake reads lower on nutrients and algae than Dixon Lake. Both are in Itasca County, Minnesota.

Reviewed by LakeQuality Editorial Team · Updated

Dixon 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 Dixon 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?

Dixon Lake

Itasca County, Minnesota

Murky, only visible to about 6 ft.

Shallow Lake

Itasca County, Minnesota

Crystal clear, you can see 16.4 ft down.

Side-by-Side Metrics

MetricDixon LakeShallow Lake
Water Clarity6 ft16.4 ft Better
Phosphorus34 µg/L9 µg/L Better
Chlorophyll-a (Algae)19.6 µg/L3.2 µg/L Better
Maximum Depth29 ft85 ft Better
Surface Area622 acres539 acres
Public AccessYesYes
Fish Species15 Better12
Trophic Stateeutrophicoligotrophic

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

Shallow Lake reads lower on nutrients and algae than Dixon Lake. Water clarity: 16.4 ft vs 6 ft. For more fish-species variety, Dixon Lake edges ahead with 15 documented species.

Source: EPA National Aquatic Resource Surveys, 2026.