Rog Lake
Rog Lake in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 19.6 ft visibility. Maximum depth: 40 ft. Surface area: 53.73 acres.
- Clarity
- 19.6 ft
- Max depth
- 40 ft
- Area
- 54 acres
- Trend
- ↓ Declining
- Public access
- No
Next lake in Cook County
Why Rog 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 Rog Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). 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.
Rog Lake is a 54-acre lake in Cook County, Minnesota with a maximum depth of 40 feet (21-foot average). Overall water quality is declining over recent sampling years. The lake supports 4 documented fish species including brook trout, burbot, and smallmouth bass. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-06-11. 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 Rog Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Crystal clear, you can see 19.6 ft down. Trophic State Index: 34.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 19.6 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 34 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Rog Lake
Compare lakeside cabins, hotels, and vacation rentals near Rog Lake in Cook 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 Rog Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 40 ft |
| Average Depth | 20.6 ft |
| Surface Area | 54 acres |
| Shoreline Length | 1.6 mi |
| Littoral Zone | 39% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Rog Lake
DNR Fisheries Survey Summary
5 surveys on file from MN DNR Fisheries. Most recent: 2013-09-16 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| White Sucker | 6.38 | 1.37 lb |
| Smallmouth Bass | 3.25 | 1.27 lb |
| Brook Trout | 2.74 | 1.7 lb |
| BUB | 1.27 | 0.29 lb |
| LNS | 1.00 | 3.46 lb |
| Walleye | 0.50 | 2.75 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.
White Sucker
Smallmouth Bass
Brook Trout
BUB
From the 2013-09-16 survey
This was the first of two assessments scheduled in the 2006 lake management plan to determine whether a change in stocking strategy begun in 2009 resulted in improved brook trout abundance. It was hoped that stocking higher numbers of fingerlings would overcome losses to predation from smallmouth bass and possibly…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Rog Lake. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — RogFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — RogFish Stocking History · MN DNR LakeFinder
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.354 m/yr | 3 |
EPA Impairment Status
Rog Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MN16-0759-00 · Official waterbody report · Matched by proximity (2.07 km)
Graded lakes near Rog Lake
Rog Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Cook County
Frequently asked questions about Rog Lake
What is the water quality grade for Rog Lake?
- Rog Lake in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 19.6 ft visibility. Maximum depth: 40 ft. Surface area: 53.73 acres.
Is Rog Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Rog 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 Rog Lake?
- Rog Lake has a maximum depth of 40 feet and an average depth of 20.6 feet. The lake covers 53.73 acres.
What fish are in Rog Lake?
- Fish species found in Rog Lake include brook trout, burbot, smallmouth bass, white sucker. Rog Lake is located in Cook County, Minnesota.
Explore Rog Lake across LakeGrade
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Where this data comes from
4 measurements from 1 monitoring station, 2022–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA4 samples · 2022–2025
Analytical methods
- Field measurement/observation, generic method
- 2130 B ~ Nephelometric Method
- 2120 B ~ Color in Water by Visual Comparison
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 size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder