Round Grove Lake
Round Grove Lake in McLeod County, Minnesota has a water quality grade of C (Fair). 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.
- Clarity
- 2.3 ft
- Typical in August
- 76°F
- Max depth
- 7 ft
- Area
- 296 acres
- Type
- Eutrophic
- Public access
- Yes
Next lake in McLeod County
Round Grove Lake is a 296-acre productive, nutrient-rich eutrophic lake in McLeod 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 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. 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 2.3 ft of visibility. Phosphorus level: 81 µg/L. Chlorophyll-a: 12.9 µg/L. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Not graded |
| Phosphorus | 81 µg/L | Poor |
| Chlorophyll-a (Algae) | 12.9 µg/L | Good |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay 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.
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Water Temperature
Round Grove Lake typically sits around 76°F at the surface in August. 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.
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
| Characteristic | Value |
|---|---|
| Maximum Depth | 7 ft |
| Surface Area | 296 acres |
| Shoreline Length | 4.3 mi |
| Littoral Zone | 100% |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Round Grove LakePublic
Fish Species
Click a species to see every graded 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.
County Ranking
Ranked #1 of 5 lakes in McLeod County
Nearby Lakes in McLeod County
Frequently asked questions about Round Grove Lake
What is the water quality grade for Round Grove Lake?
- Round Grove Lake in McLeod County, Minnesota has a water quality grade of C (Fair). 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?
- Generally safe for swimming, moderate water quality. Round Grove Lake has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 12.9 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Round Grove Lake?
- Round Grove Lake typically sits around 76°F at the surface in August, 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.
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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)
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
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