George Lake
Anoka County, MinnesotaEutrophic
George Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.
At a TSI of 50, George Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. A maximum depth of 32 ft puts George Lake in the middle of Minnesota's depth distribution. George Lake covers 489 acres alongside 3.5 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Among the 24 graded lakes in Anoka County, George Lake sits at rank 7, above the county median.
Eurasian watermilfoil has been documented at George Lake, requiring shoreline management to keep dense mats from crowding native vegetation. Bass fishing is part of the appeal: the species list runs to 12, anchored by largemouth and/or smallmouth bass. A documented public access point at George Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The lake has a long ice-out record — 58 observations on file, with a median ice-out around Apr 7. The grade is supported by multiple sampling years from Minnesota PCA volunteers and partner agencies, giving the letter a reasonably stable foundation.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-09-18. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 7.3 ft. Phosphorus level: 22 µg/L. Chlorophyll-a: 10.2 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.3 ft | C |
| Phosphorus | 22 µg/L | B |
| Chlorophyll-a (Algae) | 10.2 µg/L | C |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 32 ft |
| Average Depth | 5 ft |
| Surface Area | 488.63 acres |
| Shoreline Length | 3.5 mi |
| Littoral Zone | 80% |
| 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)
Invasive Species
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.202 m/yr | 4 |
| Phosphorus | ↓ Declining | +1.15 µg/L/yr | 4 |
| Chlorophyll-a | ↓ Declining | +5.8 µg/L/yr | 2 |
Ice Season
Historical ice data from Minnesota DNR (110 observations).
Estimated open water season: 234 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2016-03-15 (2016) | 1996-04-23 (1996) |
| Ice-In | 1991-11-04 (1991) | 2001-12-21 (2001) |
Most recent ice-out: 2023-04-15
Location
County Ranking
Ranked #7 of 24 lakes in Anoka County
Nearby Lakes in Anoka County
More Minnesota Lake Rankings
Other Grade C Lakes in Minnesota
Eutrophic Lakes in Minnesota
DNR Fisheries Survey Summary
13 surveys on file from MN DNR Fisheries. Most recent: 2024-07-16 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 86.24 | 0.13 lb |
| BNS | 23.29 | — |
| Bluntnose Minnow | 18.30 | — |
| BKF | 11.31 | — |
| Largemouth Bass | 9.21 | 0.98 lb |
| BCS | 8.59 | — |
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
BNS
Bluntnose Minnow
BKF
From the 2024-07-16 survey
A targeted survey of nearshore fish species in George Lake was conducted on July 16 - 17, 2024, by Index of Biological Integrity (IBI) Program staff. Sampling sites were evenly spaced around the lake, and each was sampled by backpack electrofishing and seining with a 50-foot or 15-foot seine, where possible. Backpack…
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
- —Aquatic Plant Report — George (1384)Aquatic Plant Report · 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: 2024-09-18
Monitoring stations: 1