Minnetoga Lake
Hennepin County, Minnesota15 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Minnetoga Lake. Here is what has been measured.
- Eutrophic
- 27 ft max depth
- Limited data
Minnetoga Lake in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 4.4 ft visibility. Phosphorus: 36.5 µg/L. Chlorophyll-a (algae): 9.7 µg/L. Maximum depth: 27 ft. Surface area: 15.1 acres.
Minnetoga Lake is a 15-acre productive, nutrient-rich eutrophic lake in Hennepin County, Minnesota with a maximum depth of 27 feet. Limited fish-species data available. No public access — the lake is private or restricted. Compared to the 80 other monitored lakes in Hennepin County, Minnetoga Lake ranks #23 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-20. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
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 Minnetoga 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 Minnetoga Lake
These are the measurements Minnesota PCA publishes for Minnetoga Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.4 ft. Phosphorus 36.5 µg/L. Chlorophyll-a 9.7 µg/L. TSI 55.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 36.5µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 9.7µg/L | Fair GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 55 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Minnetoga Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Minnetoga Lake typically sits around 57°F at the surface in October. Summer average is about 76°F. Usually warmest in Jul (about 79°F) and coldest in Apr (about 55°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (55°F) to its warmest (79°F).
Typical surface water temperature by month, from 40 field readings (2010–2024) via the EPA Water Quality Portal. See the full Minnetoga Lake water temperature breakdown →
Lake Details
Max depth
27 ft
Surface area
15 acres
Shoreline
0.8 mi
Littoral zone
7%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
Stays via Stay22
Stays near Minnetoga Lake
Compare lakeside cabins, hotels, and vacation rentals near Minnetoga 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.
Top-rated places to stay near Minnetoga Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
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 →
Follow Minnetoga Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Minnetoga Lake
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Minnetoga Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Veolia Wts Solutions Usa IncMinnetonka · 1 mi away · NPDES MN0059013Recent violation
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 Hennepin County
Frequently asked questions about Minnetoga Lake
Where is Minnetoga Lake?
- Minnetoga Lake is a lake in Hennepin County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Minnetoga Lake?
- Minnetoga Lake in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 4.4 ft visibility. Phosphorus: 36.5 µg/L. Chlorophyll-a (algae): 9.7 µg/L. Maximum depth: 27 ft. Surface area: 15.1 acres.
Is Minnetoga 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 Minnetoga Lake?
- Minnetoga Lake typically sits around 57°F at the surface in October, from 40 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is Minnetoga Lake?
- Minnetoga Lake has a maximum depth of 27 feet. The lake covers 15.1 acres.
Can I fish at Minnetoga Lake?
- Public access to Minnetoga 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 Minnetoga Lake across LakeQuality
Fish species and the cleanest lakes across Minnesota
Fish species and best lakes in Hennepin County
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its readings
Lakes in the Crow River Watershed, ranked by water quality
Minnesota's cleanest lakes, ranked on agency measurements
More lakes in Minnesota
State Parks Near Minnetoga Lake
Other Lakes in Minnesota
Eutrophic Lakes in Minnesota
Where this data comes from
56 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA56 samples · 2024
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Colorimetry
- Analysis of Chlorophyll in Periphyton and Plankton
Monitoring station identifiers (1)
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 details from Minnesota DNR LakeFinder