Unnamed Lake
Unnamed Lake in Hennepin County, Minnesota has a water quality grade of D (Nutrient-rich). Water clarity: 3.3 ft visibility. Phosphorus: 58 µg/L. Chlorophyll-a (algae): 17 µg/L.
- Clarity
- 3.3 ft
- Type
- Eutrophic
- Trend
- ↓ Declining
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Unnamed Lake →
Next lake in Hennepin County
Unnamed Lake is a productive, nutrient-rich eutrophic lake in Hennepin County, Minnesota. Water quality is graded D based on 3 sampling years through 2025. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 80 other monitored lakes in Hennepin County, Unnamed Lake ranks #26 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-28. Grade methodology: LakeGrade methodology.
Watch Unnamed Lake water quality
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Swimming Safety
Grade onlyAlgae risk
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Very murky, less than 3.3 ft of visibility. Phosphorus level: 58 µg/L. Chlorophyll-a: 17 µg/L. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | Not graded |
| Phosphorus | 58 µg/L | Poor |
| Chlorophyll-a (Algae) | 17 µg/L | Poor |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Unnamed Lake
Compare lakeside cabins, hotels, and vacation rentals near Unnamed Lake in Hennepin 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Unnamed Lake are listed below.
Top-rated places to stay near Unnamed Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Minnesota’s top lakes →
Recreation & Access
- Twin LakePublic
Fishing Unnamed Lake
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.49 m/yr | 3 |
| Phosphorus | ↓ Declining | +15.75 µg/L/yr | 2 |
| Chlorophyll-a | ↓ Declining | +9.95 µg/L/yr | 2 |
EPA Impairment Status
Unnamed 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 MN27-0042-02 · Official waterbody report · Matched by proximity (0.63 km)
County Ranking
Ranked #26 of 81 lakes in Hennepin County
Nearby Lakes With Higher Grades
Unnamed Lake holds Grade D. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Hennepin County
Frequently asked questions about Unnamed Lake
What is the water quality grade for Unnamed Lake?
- Unnamed Lake in Hennepin County, Minnesota has a water quality grade of D (Nutrient-rich). Water clarity: 3.3 ft visibility. Phosphorus: 58 µg/L. Chlorophyll-a (algae): 17 µg/L.
Is Unnamed Lake safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Unnamed Lake has a water quality grade of D (Nutrient-rich). Algae concentration (chlorophyll-a) is 17 µg/L. Always check local health department advisories before swimming.
Are there boat ramps on Unnamed Lake?
- Unnamed Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Twin Lake. Public access is listed as yes.
Explore Unnamed Lake across LakeGrade
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Where this data comes from
358 measurements from 8 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
MNPCA358 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- 4500 N C ~ Persufate Method for Total Nitrogen
- Turbidity, Nephelometric Method
- Phosphorus by Colorimetry
- Analysis of Chlorophyll in Periphyton and Plankton
Monitoring station identifiers (8)
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
Named boat-access points from the USGS National Boat Ramps inventory