Unnamed Lake
Dakota County, MinnesotaMesotrophic
On the LakeGrade scale Unnamed Lake grades a B, with clarity at 6.9 ft and 25 µg/L of phosphorus placing it above the Minnesota median. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.
Mesotrophic conditions dominate at Unnamed Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Among the 36 graded lakes in Dakota County, Unnamed Lake ranks 6 — in the top quartile locally.
No invasive species are currently listed at Unnamed Lake — the lake remains off the Minnesota infested-waters roster. Bass fishing is part of the appeal: the species list runs to 3, anchored by largemouth and/or smallmouth bass. No formal public access is documented at Unnamed Lake — most use is by shoreline residents and their guests. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-09-26. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 6.9 ft. Phosphorus level: 25 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.9 ft | C |
| Phosphorus | 25 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Unnamed Lake (14-day solunar calendar)
→ Is it safe to eat fish from Unnamed Lake? (mercury & PFAS guide)
→ Unnamed Lake fishing regulations (limits, seasons, special rules)
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.04 m/yr | 5 |
| Phosphorus | ↓ Declining | +6.75 µg/L/yr | 5 |
Location
County Ranking
Ranked #6 of 36 lakes in Dakota County
Nearby Lakes in Dakota County
More Minnesota Lake Rankings
State Parks Near Unnamed Lake
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Unnamed Lake. 1 report on file.
- —Fish Stocking History — BaldFish Stocking History · MN DNR LakeFinder
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-26
Monitoring stations: 12