German Lake
Becker County, MinnesotaLimited DataEutrophic
The LakeGrade rubric puts German Lake at a C: clarity readings still being added, 34 µg/L of phosphorus, and a TSI of 55 signal an intermediate trophic state.
A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. German Lake reaches 38 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. German Lake covers 418 acres alongside 7.6 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within the 93 graded lakes of Becker County, German Lake sits at rank 74, near the bottom of the county list.
Zebra mussel presence at German Lake means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. Walleye are documented at German Lake, one of 14 fish species on record for the lake. A documented public access point at German Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. Ice-out has been recorded 8 times at German Lake, with a median around Apr 18. 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 2022-09-27. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
No clarity data. Phosphorus level: 34 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 34 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 38 ft |
| Surface Area | 417.57 acres |
| Shoreline Length | 7.6 mi |
| Littoral Zone | 46% |
| Public Access | Yes |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for German Lake (14-day solunar calendar)
→ Is it safe to eat fish from German Lake? (mercury & PFAS guide)
→ German Lake fishing regulations (limits, seasons, special rules)
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Ice Season
Historical ice data from Minnesota DNR (10 observations).
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2021-04-03 (2021) | 2022-05-06 (2022) |
| Ice-In | 2023-11-25 (2023) | 2024-11-29 (2024) |
Most recent ice-out: 2024-04-06
Location
County Ranking
Ranked #74 of 93 lakes in Becker County
Cleaner Lakes Within 30 Miles
German Lake holds Grade C. 4 nearby lakes hold higher grades.
Nearby Lakes in Becker County
More Minnesota Lake Rankings
Other Grade C Lakes in Minnesota
Eutrophic Lakes in Minnesota
DNR Fisheries Survey Summary
10 surveys on file from MN DNR Fisheries. Most recent: 2022-06-13 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 25.12 | 0.26 lb |
| Yellow Perch | 11.03 | 0.16 lb |
| Black Bullhead | 8.98 | 0.39 lb |
| Largemouth Bass | 7.60 | 1.42 lb |
| Yellow Bass | 7.31 | 0.61 lb |
| Tullibee (Cisco) | 5.80 | 1.72 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
Length Distributions
Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.
Bluegill
Yellow Perch
Black Bullhead
Largemouth Bass
From the 2022-06-13 survey
Buffalo Lake is a 376-acre, class 25 lake located in central Becker County near the community of Richwood. It is long and narrow with one bay extending north to the southern boundary of the White Earth Indian Reservation. Although it lies near the headwaters of the Buffalo River, it is the furthest downstream major…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for German Lake. 4 reports on file.
- —Fisheries Lake Survey — BuffaloFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Buffalo (1213)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — BuffaloFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — BuffaloPublic Water Access Sites · MN DNR LakeFinder
EPA Impairment Status
German 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 MN03-0350-00 · Official waterbody report · Matched by proximity (2.71 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
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate
Most recent sample: 2022-09-27
Monitoring stations: 1