Unnamed Lake
Unnamed Lake in Morrison County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.9 ft visibility. Chlorophyll-a (algae): 6.2 µg/L.
- Clarity
- 6.9 ft
- Typical in August
- 73°F
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Morrison County
Why Unnamed 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 Unnamed 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 and algae (chlorophyll-a), but not phosphorus.
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.
Unnamed Lake is a lake in Morrison County, Minnesota. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-10-01. 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 Unnamed Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 6.9 ft. Chlorophyll-a: 6.2 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.9 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 6.2 µg/L | Not graded |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Unnamed Lake
Compare lakeside cabins, hotels, and vacation rentals near Unnamed Lake in Morrison 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 Unnamed Lake
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Water Temperature
Unnamed Lake typically sits around 73°F at the surface in August. Summer average is about 70°F. Usually warmest in Aug (about 73°F) and coldest in May (about 63°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 81 field readings (2021–2025) via the EPA Water Quality Portal. See the full Unnamed Lake water temperature breakdown →
Recreation & Access
- Fisherman's Bank #4Public
- Wilder Landing #2Public
Fishing Unnamed Lake
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.193 m/yr | 6 |
Graded lakes near Unnamed Lake
Unnamed Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Morrison County
Frequently asked questions about Unnamed Lake
What is the water quality grade for Unnamed Lake?
- Unnamed Lake in Morrison County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.9 ft visibility. Chlorophyll-a (algae): 6.2 µg/L.
Is Unnamed Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Unnamed Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Algae concentration (chlorophyll-a) is 6.2 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Unnamed Lake?
- Unnamed Lake typically sits around 73°F at the surface in August, from 81 EPA Water Quality Portal field readings (2021–2025). That is a typical value for the month, not a live reading.
Are there boat ramps on Unnamed Lake?
- Unnamed Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Fisherman's Bank #4, Wilder Landing #2. Public access is listed as yes.
Explore Unnamed Lake across LakeGrade
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Where this data comes from
55 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA55 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- 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
Named boat-access points from the USGS National Boat Ramps inventory