Greenwood Lake
Lake County, Minnesota1,329 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Greenwood Lake. Here is what has been measured.
- Eutrophic
- Impaired · Mercury
- 7 ft max depth
- Public access
- Limited data
Greenwood Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 27.5 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Maximum depth: 7 ft. Surface area: 1329.21 acres.
Free interactive depth-contour map of Greenwood Lake, reaching a maximum surveyed depth of 5 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Minnesota DNR.
Greenwood Lake is a 1,329-acre productive, nutrient-rich eutrophic lake in Lake County, Minnesota with a maximum depth of 7 feet. The lake supports 7 documented fish species including bluegill, northern pike, and pumpkinseed. Public access is available with 1 public boat landing. Compared to the 34 other monitored lakes in Lake County, Greenwood Lake ranks #30 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-03. Methodology: how these readings are compared.
Greenwood Lake covers about 1,300 acres in Lake County. It has one public boat landing. If you are planning to stay, you can search lake houses and cabins around Greenwood Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Greenwood Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing7 species recorded
- Big water1,329 acres
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. Greenwood Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Greenwood 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 Greenwood Lake
These are the measurements Minnesota PCA publishes for Greenwood Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.1 ft of visibility. Phosphorus 27.5 µg/L. Chlorophyll-a 5.9 µg/L. TSI 56.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 27.5µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 5.9µg/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. | 56 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Greenwood Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Greenwood Lake typically sits around 64°F at the surface in September. Summer average is about 69°F. Usually warmest in Jul (about 73°F) and coldest in May (about 54°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (54°F) to its warmest (73°F).
Typical surface water temperature by month, from 17 field readings (2011–2025) via the EPA Water Quality Portal. See the full Greenwood Lake water temperature breakdown →
Lake Details
Max depth
7 ft
Surface area
1,329 acres
Shoreline
11 mi
Littoral zone
100%
Share shallower than 15 ft
Public access
Yes
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
38 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,768 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Greenwood LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Greenwood Lake
Compare lakeside cabins, hotels, and vacation rentals near Greenwood Lake in Lake 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 Greenwood 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 Greenwood Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Greenwood Lake
EPA Impairment Status
Greenwood Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit MN38-0656-00 · Official waterbody report
Nearby Lakes in Lake County
Frequently asked questions about Greenwood Lake
Where is Greenwood Lake?
- Greenwood Lake is a lake in Lake County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Greenwood Lake?
- Greenwood Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 27.5 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Maximum depth: 7 ft. Surface area: 1329.21 acres.
Is Greenwood Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Greenwood Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
What is the water temperature of Greenwood Lake?
- Greenwood Lake typically sits around 64°F at the surface in September, from 17 EPA Water Quality Portal field readings (2011–2025). That is a typical value for the month, not a live reading.
How deep is Greenwood Lake?
- Greenwood Lake has a maximum depth of 7 feet. The lake covers 1329.21 acres.
What fish are in Greenwood Lake?
- Fish species found in Greenwood Lake include bluegill, northern pike, pumpkinseed, sunfish, walleye, white sucker, yellow perch. Greenwood Lake is located in Lake County, Minnesota.
Are there boat ramps on Greenwood Lake?
- Greenwood Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Greenwood Lake. Public access is listed as yes.
Can I fish at Greenwood Lake?
- Greenwood Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. 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 Greenwood Lake across LakeQuality
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Where this data comes from
22 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
MNPCA22 samples · 2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory