Greenwood Lake
Greenwood Lake in Lake County, Minnesota has a water quality grade of C (Fair). 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.
- Clarity
- 2.1 ft
- Typical in August
- 68°F
- Max depth
- 7 ft
- Area
- 1,329 acres
- Type
- Eutrophic
- Public access
- Yes
Next lake in Lake County
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. Water quality is graded C based on 2 sampling years through 2025. 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. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Very murky, less than 2.1 ft of visibility. Phosphorus level: 27.5 µg/L. Chlorophyll-a: 5.9 µg/L. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.1 ft | Not graded |
| Phosphorus | 27.5 µg/L | Fair |
| Chlorophyll-a (Algae) | 5.9 µg/L | Good |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay 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
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Water Temperature
Greenwood Lake typically sits around 68°F at the surface in August. 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.
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
| Characteristic | Value |
|---|---|
| Maximum Depth | 7 ft |
| Surface Area | 1,329 acres |
| Shoreline Length | 11 mi |
| Littoral Zone | 100% |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Greenwood LakePublic
Fish Species
Click a species to see every graded 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
Source: EPA ATTAINS assessment unit MN38-0656-00 · Official waterbody report
County Ranking
Ranked #30 of 35 lakes in Lake County
Nearby Lakes in Lake County
Frequently asked questions about Greenwood Lake
What is the water quality grade for Greenwood Lake?
- Greenwood Lake in Lake County, Minnesota has a water quality grade of C (Fair). 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?
- Generally safe for swimming, moderate water quality. Greenwood Lake has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 5.9 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Greenwood Lake?
- Greenwood Lake typically sits around 68°F at the surface in August, 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.
Explore Greenwood Lake across LakeGrade
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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)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory