Eddy Lake
Eddy Lake in Carlton County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.5 ft visibility. Maximum depth: 37 ft. Surface area: 23.97 acres.
- Clarity
- 3.5 ft
- Max depth
- 37 ft
- Area
- 24 acres
- Trend
- ↑ Improving
- Public access
- No
- Ice-out
- Apr 4
- Open water
- 248 days
Next lake in Carlton County
Why Eddy Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Eddy Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Eddy Lake is a 24-acre lake in Carlton County, Minnesota with a maximum depth of 37 feet. Overall water quality is improving over recent sampling years. The lake supports 13 documented fish species including black crappie, bluegill, and green sunfish. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2021-11-07. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Eddy Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 3.5 ft. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Eddy Lake
Compare lakeside cabins, hotels, and vacation rentals near Eddy Lake in Carlton County, Minnesota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 37 ft |
| Surface Area | 24 acres |
| Shoreline Length | 0.9 mi |
| Littoral Zone | 79% |
| Public Access | No |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Eddy Lake
DNR Fisheries Survey Summary
2 surveys on file from MN DNR Fisheries. Most recent: 1998-08-03 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Largemouth Bass | 32.00 | — |
| Bluegill | 9.19 | 0.2 lb |
| Black Crappie | 5.76 | 0.48 lb |
| Yellow Perch | 3.56 | 0.17 lb |
| Pumpkinseed | 3.21 | 0.22 lb |
| White Sucker | 2.99 | 2.84 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.
Largemouth Bass
Bluegill
Black Crappie
Yellow Perch
From the 1998-08-03 survey
Eddy lake is 23 acres and is located 3 miles north of Moose Lake, MN along Interstate Highway 35. Access is via the Moose Horn River from Hanging Horn Lake, however this access can be difficult during low water periods. The maximum depth is 37 feet with 83 percent of the lake being less than 15 feet deep. Population…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Eddy Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — EddyFisheries Lake Survey · MN DNR LakeFinder
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.174 m/yr | 4 |
Ice Season
Historical ice data from Minnesota DNR (31 observations).
Estimated open water season: 248 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 1995-03-18 (1995) | 1994-04-25 (1994) |
| Ice-In | 1997-11-20 (1997) | 2006-01-02 (2006) |
Most recent ice-out: 2015-04-04
EPA Impairment Status
Eddy Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN09-0039-00 · Official waterbody report
Nearby Lakes in Carlton County
Frequently asked questions about Eddy Lake
What is the water quality grade for Eddy Lake?
- Eddy Lake in Carlton County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.5 ft visibility. Maximum depth: 37 ft. Surface area: 23.97 acres.
Is Eddy Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Eddy Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Eddy Lake?
- Eddy Lake has a maximum depth of 37 feet. The lake covers 23.97 acres.
What fish are in Eddy Lake?
- Fish species found in Eddy Lake include black crappie, bluegill, green sunfish, largemouth bass, northern pike, pumpkinseed, rock bass, shorthead redhorse, silver redhorse, walleye, white sucker, yellow bullhead, yellow perch. Eddy Lake is located in Carlton County, Minnesota.
When does Eddy Lake thaw?
- Eddy Lake typically has ice-out around Apr 4. Ice typically forms around Dec 8. The open water season is approximately 248 days.
Explore Eddy Lake across LakeGrade
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Where this data comes from
5 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA5 samples · 2021
Analytical methods
- Field measurement/observation, generic method
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate