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C

Casey Lake

Ramsey County, MinnesotaLimited DataEutrophic

Casey Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade.

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. Casey Lake is a shallow lake at 4 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. At 12 acres, Casey Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Casey Lake ranks 21 of 49 in Ramsey County — solidly in the upper half of the local distribution.

No invasive species are currently listed at Casey Lake — the lake remains off the Minnesota infested-waters roster. 4 fish species are on record, with panfish making up the recreational core. No formal public access is documented at Casey Lake — most use is by shoreline residents and their guests. 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 2020-02-21. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

No clarity data. Phosphorus level: 30 µg/L. Trophic State Index: 53.

MetricValueGrade
Water Clarity (Secchi Depth)No data
Phosphorus30 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)53Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth3.5 ft
Surface Area11.82 acres
Shoreline Length0.6 mi
Littoral Zone100%
Public AccessNo

Fish Species

black bullhead,black crappie,common carp,green sunfish

Click a species to see all Minnesota and Wisconsin lakes where it is found.

→ Best fishing times for Casey Lake (14-day solunar calendar)

→ Is it safe to eat fish from Casey Lake? (mercury & PFAS guide)

Casey Lake fishing regulations (limits, seasons, special rules)

Location

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County Ranking

Ranked #21 of 49 lakes in Ramsey County

Cleaner Lakes Within 30 Miles

Casey Lake holds Grade C. One nearby lake has a higher grade.

Nearby Lakes in Ramsey County

DNR Fisheries Survey Summary

2 surveys on file from MN DNR Fisheries. Most recent: 2007-10-18 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Black Crappie97.100.04 lb
Black Bullhead22.930.09 lb
Green Sunfish12.880.03 lb
Common Carp5.920.84 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.

Black Crappie

852 fish · 410 in · 2007-10-18
6283140trophy 1045678910

Black Bullhead

103 fish · 48 in · 2007-10-18
4925045678

Green Sunfish

120 fish · 34 in · 2007-10-18
8543034

Common Carp

28 fish · 1217 in · 2007-10-18
740121314151617

From the 2007-10-18 survey

Casey Lake is a small, shallow lake located in North St. Paul. Most of the shoreline is within Casey Lake Park. The park offers ball fields, playground, parking, restrooms, picnicking, and walking paths. The Ramsey-Washington Metro Watershed District conducted a shoreline restoration in the park in 2007. This will…

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 Casey Lake. 1 report on file.

EPA Impairment Status

Casey Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Salinity / chlorides

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN62-0141-00 · Official waterbody report · Matched by proximity (1.53 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

Most recent sample: 2020-02-21

Monitoring stations: 1