Andrus Lake
Andrus Lake in Cass County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 12 ft visibility. Maximum depth: 55 ft. Surface area: 55.81 acres.
- Clarity
- 12 ft
- Max depth
- 55 ft
- Area
- 56 acres
- Public access
- No
Next lake in Cass County
Why Andrus 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 Andrus 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.
Andrus Lake is a 56-acre lake in Cass County, Minnesota with a maximum depth of 55 feet (16-foot average). 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 2020-09-02. Grade methodology: LakeGrade methodology.
Watch Andrus 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 Andrus Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 12 ft. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Andrus Lake
Compare lakeside cabins, hotels, and vacation rentals near Andrus Lake in Cass 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 Andrus Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 55 ft |
| Average Depth | 16 ft |
| Surface Area | 56 acres |
| Shoreline Length | 1.7 mi |
| Littoral Zone | 45% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Andrus Lake
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1981-06-22 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 71.67 | 0.13 lb |
| Yellow Perch | 20.00 | 0.14 lb |
| Yellow Bass | 15.66 | 0.41 lb |
| Northern Pike | 3.33 | 5.8 lb |
| Pumpkinseed | 2.33 | 0.22 lb |
| Largemouth Bass | 1.50 | 0.4 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 1981-06-22 survey
Present Fishing Status: Test netting indicates a good northern pike population. Fish are large with the average size being over five pounds. An adequate population of yellow perch, largemouth bass and black crappie are preset. A stunted population of bluegills was evident.Additional Field Notes: One pair of loons…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Andrus Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — AndrusFisheries Lake Survey · MN DNR LakeFinder
Graded lakes near Andrus Lake
Andrus Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Cass County
Frequently asked questions about Andrus Lake
What is the water quality grade for Andrus Lake?
- Andrus Lake in Cass County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 12 ft visibility. Maximum depth: 55 ft. Surface area: 55.81 acres.
Is Andrus Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Andrus 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 Andrus Lake?
- Andrus Lake has a maximum depth of 55 feet and an average depth of 16 feet. The lake covers 55.81 acres.
Explore Andrus Lake across LakeGrade
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Where this data comes from
6 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA6 samples · 2020
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