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.
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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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 30 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 3.5 ft |
| Surface Area | 11.82 acres |
| Shoreline Length | 0.6 mi |
| Littoral Zone | 100% |
| Public Access | No |
Fish Species
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
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
More Minnesota Lake Rankings
State Parks Near Casey Lake
Other Grade C Lakes in Minnesota
Eutrophic Lakes in Minnesota
DNR Fisheries Survey Summary
2 surveys on file from MN DNR Fisheries. Most recent: 2007-10-18 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Black Crappie | 97.10 | 0.04 lb |
| Black Bullhead | 22.93 | 0.09 lb |
| Green Sunfish | 12.88 | 0.03 lb |
| Common Carp | 5.92 | 0.84 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
Black Bullhead
Green Sunfish
Common Carp
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…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Casey Lake. 1 report on file.
- —Fisheries Lake Survey — CaseyFisheries Lake Survey · MN DNR LakeFinder
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
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