Round Grove Lake
McLeod County, Minnesota296 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Round Grove Lake. Here is what has been measured.
- Eutrophic
- 7 ft max depth
- Public access
- Limited data
Round Grove Lake in McLeod County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 81 µg/L. Chlorophyll-a (algae): 12.9 µg/L. Maximum depth: 7 ft. Surface area: 295.72 acres.
Round Grove Lake is a 296-acre productive, nutrient-rich eutrophic lake in McLeod County, Minnesota with a maximum depth of 7 feet. The lake supports 7 documented fish species including black bullhead, black crappie, and brown bullhead. Public access is available with 1 public boat landing. Compared to the 4 other monitored lakes in McLeod County, Round Grove Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-24. Methodology: how these readings are compared.
What Round Grove Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing7 species recorded
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 Round Grove 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 Round Grove Lake
These are the measurements Minnesota PCA publishes for Round Grove 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 2.3 ft of visibility. Phosphorus 81 µg/L. Chlorophyll-a 12.9 µg/L. TSI 63.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 81µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 12.9µg/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. | 63 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Round Grove Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Round Grove Lake typically sits around 70°F at the surface in September. Summer average is about 76°F. Usually warmest in Jul (about 80°F) and coldest in Sep (about 70°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (70°F) to its warmest (80°F).
Typical surface water temperature by month, from 11 field readings (2025–2025) via the EPA Water Quality Portal. See the full Round Grove Lake water temperature breakdown →
Lake Details
Max depth
7 ft
Surface area
296 acres
Shoreline
4.3 mi
Littoral zone
100%
Share shallower than 15 ft
Public access
Yes
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
8 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,040 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Round Grove 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 Round Grove Lake
Compare lakeside cabins, hotels, and vacation rentals near Round Grove Lake in McLeod 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 Round Grove 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 Round Grove Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fish Species
Click a species to see every lake where it is documented.
Fishing Round Grove Lake
Reservoir Info (USACE NID)
Round Grove Lake is a man-made reservoir impounded by the Round Grove Lake (completed 1921), built primarily for other on the Judicial Ditch 22; gravity-type dam, 10 ft tall and 15 ft long.
- Surface area
- 307 ac
- Normal storage
- 1,595 ac-ft
- Max storage
- 2,552 ac-ft
- Drainage area
- 2.74 sq mi
- Hazard class
- Low
- Owner
- County of McLeod
Source: USACE National Inventory of Dams, NID ID MN00157 · Operator website
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Round Grove Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Stewart WwtpStewart · 2.1 mi away · NPDES MN0053210Recent 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 McLeod County
Frequently asked questions about Round Grove Lake
Where is Round Grove Lake?
- Round Grove Lake is a lake in McLeod County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Round Grove Lake?
- Round Grove Lake in McLeod County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 81 µg/L. Chlorophyll-a (algae): 12.9 µg/L. Maximum depth: 7 ft. Surface area: 295.72 acres.
Is Round Grove 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 Round Grove Lake?
- Round Grove Lake typically sits around 70°F at the surface in September, from 11 EPA Water Quality Portal field readings (2025–2025). That is a typical value for the month, not a live reading.
How deep is Round Grove Lake?
- Round Grove Lake has a maximum depth of 7 feet. The lake covers 295.72 acres.
What fish are in Round Grove Lake?
- Fish species found in Round Grove Lake include black bullhead, black crappie, brown bullhead, common carp, hybrid sunfish, orangespotted sunfish, walleye. Round Grove Lake is located in McLeod County, Minnesota.
Are there boat ramps on Round Grove Lake?
- Round Grove Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Round Grove Lake. Public access is listed as yes.
Can I fish at Round Grove Lake?
- Round Grove 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 Round Grove Lake across LakeQuality
Fish species and the cleanest lakes across Minnesota
Fish species and best lakes in McLeod 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 Round Grove Lake
Other Lakes in Minnesota
Eutrophic Lakes in Minnesota
Where this data comes from
11 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
MNPCA11 samples · 2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by 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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory