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LakeQuality
C

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.

MetricValueGrade
Water Clarity (Secchi Depth)7.3 ftC
Phosphorus22 µg/LB
Chlorophyll-a (Algae)10.2 µg/LC
Trophic State Index (TSI)50Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth32 ft
Average Depth5 ft
Surface Area488.63 acres
Shoreline Length3.5 mi
Littoral Zone80%
Public AccessYes

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

Eurasian watermilfoil

Water Quality Trend: Declining

Based on 4 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.202 m/yr4
Phosphorus Declining+1.15 µg/L/yr4
Chlorophyll-a Declining+5.8 µg/L/yr2

Ice Season

Historical ice data from Minnesota DNR (110 observations).

Typical Ice-Out
Apr 7
Typical Ice-In
Nov 27

Estimated open water season: 234 days

EarliestLatest
Ice-Out2016-03-15 (2016)1996-04-23 (1996)
Ice-In1991-11-04 (1991)2001-12-21 (2001)

Most recent ice-out: 2023-04-15

Location

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County Ranking

Ranked #7 of 24 lakes in Anoka County

Nearby Lakes in Anoka County

DNR Fisheries Survey Summary

13 surveys on file from MN DNR Fisheries. Most recent: 2024-07-16 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill86.240.13 lb
BNS23.29
Bluntnose Minnow18.30
BKF11.31
Largemouth Bass9.210.98 lb
BCS8.59

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

143 fish · 38 in · 2024-07-16
38190345678

BNS

2 fish · 00 in · 1988-06-22
2100

Bluntnose Minnow

2 fish · 00 in · 1983-06-20
2100

BKF

1 fish · 00 in · 1988-06-22
100

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…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for George Lake. 3 reports on file.

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