Finberg Lake
Finberg Lake in St. Louis County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6 ft visibility. Maximum depth: 18 ft. Surface area: 139.19 acres.
- Clarity
- 6 ft
- Max depth
- 18 ft
- Area
- 139 acres
- Trend
- → Stable
- Public access
- No
Next lake in St. Louis County
Why Finberg 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 Finberg 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.
Finberg Lake is a 139-acre lake in St. Louis County, Minnesota with a maximum depth of 18 feet. Limited fish-species data available. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2021-10-12. Grade methodology: LakeGrade methodology.
Watch Finberg Lake water quality
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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 Finberg Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 6 ft. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Finberg Lake
Compare lakeside cabins, hotels, and vacation rentals near Finberg Lake in St. Louis 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.
Top-rated places to stay near Finberg Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 18 ft |
| Surface Area | 139 acres |
| Shoreline Length | 2.8 mi |
| Littoral Zone | 93% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Finberg Lake
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1973-06-25 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Pumpkinseed | 8.50 | 0.15 lb |
| Northern Pike | 3.50 | 3.62 lb |
| White Sucker | 1.38 | 0.87 lb |
| Yellow Perch | 0.88 | 0.2 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 1973-06-25 survey
THIS LAKE IS AT PRESENT SUPPORTING AN EXCELLENT POPULATION OF NORTHERN PIKE. BOTH NUMBERS AND WEIGHTS ARE ABOVE STATE AVERAGES. THE LARGE SIZE IS PROBABLY ATTRIBUTABLE TO LIGHT FISHING PRESSURE DUE TO A LIMITED ACCESS. THE PUBLIC HAS TO ENTER THE LAKE VIA A SHALLOW STREAM FROM HWY 73. THIS STREAM IS NAVIGABLE DURING…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Finberg Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — FinbergFisheries Lake Survey · MN DNR LakeFinder
Water Quality Trend: → Stable
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.03 m/yr | 2 |
Graded lakes near Finberg Lake
Finberg Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in St. Louis County
Frequently asked questions about Finberg Lake
What is the water quality grade for Finberg Lake?
- Finberg Lake in St. Louis County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6 ft visibility. Maximum depth: 18 ft. Surface area: 139.19 acres.
Is Finberg Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Finberg 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 Finberg Lake?
- Finberg Lake has a maximum depth of 18 feet. The lake covers 139.19 acres.
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Where this data comes from
39 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA39 samples · 2020–2021
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder