Unknown County Lake Quality
Minnesota, 5 lakes, measured by Minnesota PCA
Unknown County holds 5 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. The 5 monitored lakes in Unknown County carry whatever clarity, phosphorus, and chlorophyll-a readings Minnesota PCA has published, shown as reported.
Many of the county's lakes are deep glacial basins, over 50 feet at their deepest point, which gives them thermal stratification and a buffer against summer warming.
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Quick Answers for Unknown County
Planning a trip? Check special fishing regulations for Birch Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Minnesota regulations index.
Fishing in Unknown County
DNR Reports (6)
Minnesota DNR LakeFinder resources for lakes in Unknown County. browse all reports →
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — AshdickFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — OttertrackFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — ClearwaterFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — BirchFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Clearwater (1828)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — ClearwaterPublic Water Access Sites · MN DNR LakeFinder
All Lakes in Unknown County
5 lakes · 0 ranked on readings, 5 without enough sampling0 lakes ranked on readings · 5 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|
| Birch LakeUnknown | 15 ft | No recent samples | No recent samples | No recent samples | 34 ft | Carry-in | |
| Carp LakeUnknown | 8.5 ft | No recent samples | No recent samples | No recent samples | 34 ft | Carry-in | |
| Seed LakeUnknown | 7 ft | No recent samples | No recent samples | No recent samples | No recent samples | Carry-in | |
| Swamp LakeUnknown | 16.2 ft | No recent samples | No recent samples | No recent samples | 50 ft | Carry-in | |
| Mountain LakeUnknown | 19 ft | No recent samples | No recent samples | No recent samples | 130 ft | ✓ Public |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
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Source: the Minnesota Pollution Control Agency and the Minnesota DNR. See data sources.