Unnamed Lake
Sherburne County, Minnesota36 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Unnamed Lake. Here is what has been measured.
- Mesotrophic
- 43 ft max depth
Unnamed Lake in Sherburne County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 13 ft visibility. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 3.6 µg/L. Maximum depth: 43 ft. Surface area: 35.78 acres.
Minnesota DNR's Standard Survey on July 12, 2007 caught 16.00 northern pike per gill net at Unnamed Lake. Length samples in the latest survey that recorded them ran 12–29 inches. DNR survey details →
Unnamed Lake is a 36-acre mesotrophic lake in Sherburne County, Minnesota with a maximum depth of 43 feet (13-foot average). Phosphorus level is improving over recent sampling years. The lake supports 7 documented fish species including black crappie, bluegill, and largemouth bass. No public access — the lake is private or restricted. Compared to the 17 other monitored lakes in Sherburne County, Unnamed Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-28. Methodology: how these readings are compared.
What Unnamed Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13 ft of visibility
- Fishing7 species recorded
- Ice seasonIce-out around Apr 9
- Deep water43 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Unnamed Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Unnamed Lake
These are the measurements Minnesota PCA publishes for Unnamed Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 13 ft. Phosphorus 22 µg/L. Chlorophyll-a 3.6 µg/L. TSI 44.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 13ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 22µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 3.6µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 44 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Unnamed Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Unnamed Lake typically sits around 69°F at the surface in September. Summer average is about 77°F. Usually warmest in Jul (about 80°F) and coldest in May (about 68°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (68°F) to its warmest (80°F).
Typical surface water temperature by month, from 31 field readings (2022–2025) via the EPA Water Quality Portal. See the full Unnamed Lake water temperature breakdown →
Minnesota DNR's Standard Survey on July 12, 2007 caught 16.00 northern pike per gill net at Unnamed Lake. Length samples in the latest survey that recorded them ran 12–29 inches.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Unnamed Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 2007-07-12 (Standard Survey).
1 survey on file · most recent 2007-07-12 (Standard Survey)
19 years old| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Largemouth Bass | 85.83 | 6–18 in 2007-07-12 | 1.28 lb |
| Yellow Bullhead | 21.75 | 7–13 in 2007-07-12 | 0.67 lb |
| Bluegill | 14.88 | 3–7 in 2007-07-12 | 0.11 lb |
| Northern Pike | 8.25 | 12–29 in 2007-07-12 | 1.75 lb |
| Pumpkinseed | 1.63 | 2–6 in 2007-07-12 | 0.07 lb |
| Yellow Perch | 0.25 | 5 in 2007-07-12 | 0.07 lb |
CPUE = catch per unit effort, fish caught per net per set in a standardised survey. It measures abundance, not size, and is not a weekly bite report.
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.
Largemouth Bass
Yellow Bullhead
Bluegill
Northern Pike
From the 2007-07-12 survey
Round Lake is a small (37 acres) basin connected to Pickerel and Long Lakes. The three lakes are located three miles west of Clear Lake in western Sherburne County. Clear Lake Township owns property on Long Lake and small boats can navigate to Round Lake through a connecting channel. Otherwise, there is no public…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Unnamed Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — RoundFisheries Lake Survey · MN DNR LakeFinder
Lake Details
Max depth
43 ft
Average depth
12.5 ft
Surface area
36 acres
Shoreline
1.1 mi
Littoral zone
64%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Elevation
978 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Unnamed Lake
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Top-rated places to stay near Unnamed Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Unnamed Lake
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Stable6 years
Phosphorus
Improving-1.57 µg/L/yr3 years
Chlorophyll-a
Worsening+0.31 µg/L/yr3 years
Ice season
Typical ice-out
Apr 9
Earliest Apr 1, 2007 · Latest May 1, 2018
Typical ice-in
Nov 28
Earliest Nov 13, 2018 · Latest Dec 18, 2004
Most recent ice-out
Apr 13
2022
24 observations · Minnesota PCA ice records
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Unnamed Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger.
- Saint Cloud Nutrient Energy And Water Recovery FacilitySaint Cloud · 2.7 mi away · NPDES MN0040878Major
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Sherburne County
Frequently asked questions about Unnamed Lake
Where is Unnamed Lake?
- Unnamed Lake is a lake in Sherburne County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Unnamed Lake?
- Unnamed Lake in Sherburne County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 13 ft visibility. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 3.6 µg/L. Maximum depth: 43 ft. Surface area: 35.78 acres.
Is Unnamed Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Unnamed Lake?
- Unnamed Lake typically sits around 69°F at the surface in September, from 31 EPA Water Quality Portal field readings (2022–2025). That is a typical value for the month, not a live reading.
How deep is Unnamed Lake?
- Unnamed Lake has a maximum depth of 43 feet and an average depth of 12.5 feet. The lake covers 35.78 acres.
What fish are in Unnamed Lake?
- Fish species found in Unnamed Lake include black crappie, bluegill, largemouth bass, northern pike, pumpkinseed, yellow bullhead, yellow perch. Unnamed Lake is located in Sherburne County, Minnesota.
What did the DNR fisheries survey find at Unnamed Lake?
- Minnesota DNR's Standard Survey on July 12, 2007 caught 16.00 northern pike per gill net at Unnamed Lake. Length samples in the latest survey that recorded them ran 12–29 inches. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Unnamed Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
When does Unnamed Lake thaw?
- Unnamed Lake typically has ice-out around Apr 9. Ice typically forms around Nov 28. The open water season is approximately 233 days.
Can I fish at Unnamed Lake?
- Public access to Unnamed Lake is listed as no on the lake record, so confirm before you make the trip. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
Explore Unnamed Lake across LakeQuality
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Fish species and best lakes in Sherburne County
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its readings
Minnesota's cleanest lakes, ranked on agency measurements
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State Parks Near Unnamed Lake
Other Lakes in Minnesota
Mesotrophic Lakes in Minnesota
Where this data comes from
128 measurements from 2 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA128 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (2)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate