Lee Lake
Becker County, MinnesotaLimited DataEutrophic
Lee Lake earns a D — measurements through 2024 show persistent nutrient pressure that limits clarity through the summer.
At a TSI of 51, Lee Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. 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. Lee Lake ranks 87 of 93 in Becker County — at the lower end of the locally monitored distribution.
Lee Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Lee 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. Ice-out has been recorded 17 times at Lee Lake, with a median around Apr 15. 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 2024-09-20. 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 6 ft. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.244 m/yr | 5 |
Ice Season
Historical ice data from Minnesota DNR (34 observations).
Estimated open water season: 220 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2024-03-17 (2024) | 2013-05-08 (2013) |
| Ice-In | 1991-10-25 (1991) | 2006-11-30 (2006) |
Most recent ice-out: 2024-03-17
Location
County Ranking
Ranked #87 of 93 lakes in Becker County
Cleaner Lakes Within 30 Miles
Lee Lake holds Grade D. 5 nearby lakes hold higher grades.
Nearby Lakes in Becker County
More Minnesota Lake Rankings
State Parks Near Lee Lake
Other Grade D Lakes in Minnesota
Eutrophic Lakes in Minnesota
EPA Impairment Status
Lee 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 MN03-0619-00 · Official waterbody report · Matched by proximity (0.27 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: 2024-09-20
Monitoring stations: 1