Unnamed Lake
Crow Wing County, MinnesotaMesotrophic
Unnamed Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. The two scored sub-grades — clarity and phosphorus — track close together, so neither one is dragging the average down.
The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. 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. Within Crow Wing County's 120 graded lakes, Unnamed Lake ranks 90 — below the local median, though not at the bottom.
No invasive species are currently listed at Unnamed Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Unnamed Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-09-27. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 6.7 ft. Phosphorus level: 22 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.7 ft | C |
| Phosphorus | 22 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Water Quality Trend: → Stable
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.145 m/yr | 4 |
| Phosphorus | ↑ Improving | -1.45 µg/L/yr | 4 |
Location
County Ranking
Ranked #90 of 120 lakes in Crow Wing County
Cleaner Lakes Within 30 Miles
Unnamed Lake holds Grade B. 5 nearby lakes hold higher grades.
- ASerpent LakeCrow Wing County · mi · Higher grade (B → A)
- APlacid LakeCrow Wing County · mi · Higher grade (B → A)
- AClearwater LakeCrow Wing County · mi · Higher grade (B → A)
- ARabbit LakeCrow Wing County · mi · Higher grade (B → A)
- BBordwell LakeCrow Wing County · mi · Higher overall water quality score
Nearby Lakes in Crow Wing 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.
- —Aquatic Plant Report — Olander (0050)Aquatic Plant Report · MN DNR LakeFinder
EPA Impairment Status
Unnamed Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN18-0090-00 · Official waterbody report · Matched by proximity (2.86 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-27
Monitoring stations: 4