Schisler Lake
Schisler Lake in St. Louis County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 8.3 µg/L. Maximum depth: 19 ft. Surface area: 69.81 acres.
- Max depth
- 19 ft
- Area
- 70 acres
- Trend
- ↑ Improving
- Public access
- No
Next lake in St. Louis County
Why Schisler 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 Schisler Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
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.
Schisler Lake is a 70-acre lake in St. Louis County, Minnesota with a maximum depth of 19 feet. Overall water quality is improving over recent sampling years. 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 2025-07-20. 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 Schisler Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 32 µg/L. Chlorophyll-a: 8.3 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 32 µg/L | Not graded |
| Chlorophyll-a (Algae) | 8.3 µg/L | Not graded |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Schisler Lake
Compare lakeside cabins, hotels, and vacation rentals near Schisler 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 Schisler Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 19 ft |
| Surface Area | 70 acres |
| Shoreline Length | 1.5 mi |
| Littoral Zone | 79% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Schisler Lake
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.068 m/yr | 4 |
| Phosphorus | → Stable | -0.29 µg/L/yr | 6 |
| Chlorophyll-a | ↑ Improving | -1.03 µg/L/yr | 6 |
EPA Impairment Status
Schisler 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 MN69-0529-00 · Official waterbody report · Matched by proximity (0.71 km)
Graded lakes near Schisler Lake
Schisler Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in St. Louis County
Frequently asked questions about Schisler Lake
What is the water quality grade for Schisler Lake?
- Schisler Lake in St. Louis County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 8.3 µg/L. Maximum depth: 19 ft. Surface area: 69.81 acres.
Is Schisler Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Schisler Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Algae concentration (chlorophyll-a) is 8.3 µg/L. Always check local health department advisories before swimming.
How deep is Schisler Lake?
- Schisler Lake has a maximum depth of 19 feet. The lake covers 69.81 acres.
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Where this data comes from
2 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA2 samples · 2025
Analytical methods
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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