Unnamed Lake
Becker County, MinnesotaLimited DataEutrophic
On the scoring rubric Unnamed Lake grades a D: clarity at 3.5 ft and phosphorus readings still being added keep it in the lower bracket for Becker County.
Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. 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 the 93 graded lakes of Becker County, Unnamed Lake sits at rank 85, near the bottom of the county list.
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. 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 2021-05-31. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 3.5 ft. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.5 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.016 m/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (9 observations).
Estimated open water season: 206 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2019-04-23 (2019) | 2022-05-05 (2022) |
| Ice-In | 2018-11-10 (2018) | 2006-11-29 (2006) |
Most recent ice-out: 2023-05-04
Location
County Ranking
Ranked #85 of 93 lakes in Becker County
Cleaner Lakes Within 30 Miles
Unnamed Lake holds Grade D. 5 nearby lakes hold higher grades.
- AMiddle Cormorant LakeBecker County · mi · Two grade letters higher (D → A)
- ABig Cormorant LakeBecker County · mi · Two grade letters higher (D → A)
- BIda LakeBecker County · mi · Two grade letters higher (D → B)
- CNelson LakeBecker County · mi · Higher grade (D → C)
- CUpper Cormorant LakeBecker County · mi · Higher grade (D → C)
Nearby Lakes in Becker County
More Minnesota Lake Rankings
State Parks Near Unnamed Lake
Other Grade D Lakes in Minnesota
Eutrophic 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
Source: EPA ATTAINS assessment unit MN03-0588-00 · Official waterbody report · Matched by proximity (2.35 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
Ice data from Minnesota DNR Climate
Most recent sample: 2021-05-31
Monitoring stations: 1