George Lake
Martin County, MinnesotaHypereutrophic
George Lake earns an F: 160 µg/L of phosphorus and clarity at 1.6 ft signal heavy nutrient loading from the surrounding watershed. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.
The hypereutrophic status — TSI 74 — reflects sustained heavy nutrient loading from the surrounding watershed and frequent algal pressure. A maximum depth of just 11 ft means sediment-bound phosphorus releases back into the water column whenever wind stirs the bottom — a classic shallow-lake dynamic. George Lake is small — 83 acres alongside 2.6 miles of shoreline — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Among the 7 graded lakes in Martin County, George Lake sits at rank 2, above the county median.
No invasive species are currently listed at George Lake — the lake remains off the Minnesota infested-waters roster. Walleye are documented at George Lake, one of 15 fish species on record for the lake. A documented public access point at George Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a partial ice record — 13 observed ice-outs, centered near Mar 26. Multiple sampling years from Minnesota PCA volunteers and partner agencies back the grade, so the letter should hold steady absent a major watershed shift.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-23. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.6 ft of visibility. Phosphorus level: 160 µg/L. Chlorophyll-a: 93.5 µg/L. Trophic State Index: 74.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | F |
| Phosphorus | 160 µg/L | F |
| Chlorophyll-a (Algae) | 93.5 µg/L | F |
| Trophic State Index (TSI) | 74 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 11 ft |
| Surface Area | 83.17 acres |
| Shoreline Length | 2.6 mi |
| Littoral Zone | 100% |
| Public Access | Yes |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for George Lake (14-day solunar calendar)
→ Is it safe to eat fish from George Lake? (mercury & PFAS guide)
→ George Lake fishing regulations (limits, seasons, special rules)
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.028 m/yr | 5 |
| Phosphorus | ↑ Improving | -8.05 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -33.4 µg/L/yr | 2 |
Ice Season
Historical ice data from Minnesota DNR (20 observations).
Estimated open water season: 249 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2024-02-23 (2024) | 2018-04-29 (2018) |
| Ice-In | 2018-11-13 (2018) | 2017-12-08 (2017) |
Most recent ice-out: 2026-03-10
Location
County Ranking
Ranked #2 of 7 lakes in Martin County
Nearby Lakes in Martin County
More Minnesota Lake Rankings
Other Grade F Lakes in Minnesota
DNR Fisheries Survey Summary
9 surveys on file from MN DNR Fisheries. Most recent: 2025-07-28 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| YLB | 75.64 | 0.19 lb |
| Black Bullhead | 23.97 | 0.43 lb |
| Freshwater Drum | 16.69 | 0.62 lb |
| Yellow Perch | 12.01 | 0.21 lb |
| Black Crappie | 11.22 | 0.3 lb |
| Bluegill | 11.07 | 0.28 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.
YLB
Black Bullhead
Freshwater Drum
Yellow Perch
From the 2025-07-28 survey
George Lake is an 84-acre, class 40 lake that has a maximum depth of 11.0 feet, and is located within the City of Fairmont in Martin County. George Lake is the farthest downstream on a chain of five lakes collectively known as the "Fairmont Chain of Lakes". George Lake is managed primarily for Walleye and Muskellunge…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for George Lake. 3 reports on file.
- —Fisheries Lake Survey — GeorgeFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — GeorgeFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — GeorgePublic Water Access Sites · MN DNR LakeFinder
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate
Most recent sample: 2024-10-23
Monitoring stations: 1