Unnamed Lake
Becker County, MinnesotaLimited DataHypereutrophic
On the LakeGrade rubric Unnamed Lake fails the cutoffs — a TSI of 75 and persistent algal pressure put it in the bottom tier.
A TSI above 70 puts Unnamed Lake in hypereutrophic territory: visible blooms are common, and clarity rarely climbs even in early summer. 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. Unnamed Lake ranks 91 of 93 in Becker County — at the lower end of the locally monitored distribution.
Unnamed Lake has no invasive species recorded in Minnesota state databases as of 2022, though prevention practices still apply at all access points. 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. 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 2022-09-14. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.2 ft of visibility. Trophic State Index: 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.2 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #91 of 93 lakes in Becker County
Cleaner Lakes Within 30 Miles
Unnamed Lake holds Grade F. 5 nearby lakes hold higher grades.
- APickerel LakeBecker County · mi · Two grade letters higher (F → A)
- AFloyd LakeBecker County · mi · Two grade letters higher (F → A)
- ASands LakeBecker County · mi · Two grade letters higher (F → A)
- BLittle Floyd LakeBecker County · mi · Two grade letters higher (F → B)
- BMud LakeBecker County · mi · Two grade letters higher (F → B)
Nearby Lakes in Becker County
More Minnesota Lake Rankings
State Parks Near Unnamed Lake
Other Grade F Lakes in Minnesota
EPA Impairment Status
Unnamed Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN03-0386-00 · Official waterbody report · Matched by proximity (2.77 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: 2022-09-14
Monitoring stations: 2