Carlson Lake
Dakota County, MinnesotaMesotrophic
Carlson Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.
The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. The lake bottoms out at 19 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 12 acres, Carlson Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Carlson Lake ranks 9 of 36 in Dakota County, putting it in the upper tier of locally monitored lakes.
Carlson Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The fishery includes walleye alongside the lake's other 6 documented species — a notable draw for Minnesota anglers. No formal public access is documented at Carlson Lake — most use is by shoreline residents and their guests. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-09-30. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 8 ft. Phosphorus level: 26 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | C |
| Phosphorus | 26 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 19 ft |
| Average Depth | 11.9 ft |
| Surface Area | 12.01 acres |
| Shoreline Length | 0.6 mi |
| Littoral Zone | 70% |
| Public Access | No |
Fish Species
Click a species to see all Minnesota and Wisconsin lakes where it is found.
→ Best fishing times for Carlson Lake (14-day solunar calendar)
→ Is it safe to eat fish from Carlson Lake? (mercury & PFAS guide)
→ Carlson Lake fishing regulations (limits, seasons, special rules)
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.151 m/yr | 5 |
| Phosphorus | ↓ Declining | +2.8 µg/L/yr | 5 |
| Chlorophyll-a | ↓ Declining | +0.4 µg/L/yr | 2 |
Location
County Ranking
Ranked #9 of 36 lakes in Dakota County
Nearby Lakes in Dakota County
More Minnesota Lake Rankings
State Parks Near Carlson Lake
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
6 surveys on file from MN DNR Fisheries. Most recent: 2022-06-23 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Largemouth Bass | 36.84 | 1.03 lb |
| Black Bullhead | 23.67 | 0.39 lb |
| Bluegill | 14.29 | 0.13 lb |
| Black Crappie | 8.62 | 0.15 lb |
| GOS | 6.60 | 0.11 lb |
| Channel Catfish | 3.92 | 2 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.
Largemouth Bass
Black Bullhead
Bluegill
Black Crappie
From the 2022-06-23 survey
Carlson Lake (19-0066-00), as it's now officially known is located in the city of Eagan. The lake drops off rather quickly to a maximum of 19 feet with approximately 26% of the surface area over 15 feet. Although an aeration system is operated (as needed) to prevent winterkill, city staff report it is not often…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Carlson Lake. 2 reports on file.
- —Fisheries Lake Survey — CarlsonFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — CarlsonFish Stocking History · 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
Most recent sample: 2024-09-30
Monitoring stations: 1