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LakeQuality

Upper Sakatah Lake

F
Grade F — Algae-prone
Algae-prone · #12 of 13 lakes in the county · 3 ft clear · Hypereutrophic · 892 acres
Limited DataHypereutrophic

Upper Sakatah Lake in Le Sueur County, Minnesota has a water quality grade of F (Algae-prone). Water clarity: 3 ft visibility. Phosphorus: 303 µg/L. Chlorophyll-a (algae): 76.8 µg/L. Maximum depth: 12 ft. Surface area: 892.01 acres.

Clarity
3 ft
Max depth
12 ft
Area
892 acres
Type
Hypereutrophic
Trend
Stable
Public access
Yes
Ice-out
Mar 28
Open water
248 days

Grade F measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Upper Sakatah Lake

Next lake in Le Sueur County

FTetonka Lake3 ft clear · Le Sueur CountyView →
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Free interactive depth-contour map of Upper Sakatah Lake, reaching a maximum surveyed depth of 10 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Minnesota DNR.

Upper Sakatah Lake is a 892-acre highly nutrient-loaded hypereutrophic lake in Le Sueur County, Minnesota with a maximum depth of 12 feet. Water quality is graded F based on 2 sampling years through 2025. Phosphorus level is improving over recent sampling years. The lake supports 14 documented fish species including bigmouth buffalo, black bullhead, and black crappie. Public access is available with 2 public boat landings. Compared to the 12 other monitored lakes in Le Sueur County, Upper Sakatah Lake ranks #12 for water quality.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-21. Grade methodology: LakeGrade methodology.

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Swimming Safety

Grade only

Limited 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.

Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom

Compare the safest swimming lakes near Mankato

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Water Quality Grade: F (Algae-prone)

Very murky, less than 3 ft of visibility. Phosphorus level: 303 µg/L. Chlorophyll-a: 76.8 µg/L. Trophic State Index: 74.

MetricValueGrade
Water Clarity (Secchi Depth)3 ftNot graded
Phosphorus303 µg/LPoor
Chlorophyll-a (Algae)76.8 µg/LPoor
Trophic State Index (TSI)74Hypereutrophic

Very high nutrients, dense algae, poor clarity

Where to stay near Upper Sakatah Lake

Compare lakeside cabins, hotels, and vacation rentals near Upper Sakatah Lake in Le Sueur 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Upper Sakatah Lake are listed below.

Top-rated places to stay near Upper Sakatah Lake

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Lake Details

CharacteristicValue
Maximum Depth12 ft
Surface Area892 acres
Shoreline Length8 mi
Littoral Zone100%
Public AccessYes

Lake Size & Watershed

Watershed (drainage) area
165 sq mi
Elevation
991 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).

Recreation & Access

2
Boat Landings
Yes
Public Access
  • Upper Sakatah LakePublic
  • WatervillePublic

Fish Species

Click a species to see every graded lake where it is documented.

Fishing Upper Sakatah Lake

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Eurasian watermilfoilflowering rush

DNR Fisheries Survey Summary

9 surveys on file from MN DNR Fisheries. Most recent: 2020-08-03 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Black Bullhead107.330.6 lb
Freshwater Drum20.010.87 lb
Largemouth Bass6.900.99 lb
Walleye6.840.89 lb
Yellow Perch5.850.25 lb
White Bass5.820.74 lb

CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.

Length Distributions

Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.

Black Bullhead

1 fish · 1010 in · 2020-08-03
1010

Freshwater Drum

55 fish · 319 in · 2020-08-03
15804681012141618

Largemouth Bass

1 fish · 66 in · 2020-08-03
106

Walleye

85 fish · 823 in · 2020-08-03
29150trophy 24810121416182022

From the 2020-08-03 survey

Upper Sakatah Lake is an 881-acre lake located on the east side of the town of Waterville in Le Sueur County. It has a maximum depth of 12 feet. A boat access is located in Sakatah State Park on the south shore but it can also be accessed via the Cannon River. Upper Sakatah Lake is primarily managed for Walleye and…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Upper Sakatah Lake. 3 reports on file.

These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Phosphorus Improving-50.5 µg/L/yr2
Chlorophyll-a Declining+25.87 µg/L/yr2

Ice Season

Historical ice data from Minnesota DNR (34 observations).

Typical Ice-Out
Mar 28
Typical Ice-In
Dec 1

Estimated open water season: 248 days

EarliestLatest
Ice-Out2024-02-27 (2024)2013-04-21 (2013)
Ice-In2006-11-25 (2006)2021-12-07 (2021)

Most recent ice-out: 2025-03-15

EPA Impairment Status

Upper Sakatah Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

MercuryNutrients (phosphorus, nitrogen)

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN40-0002-00 · Official waterbody report

Regulated Pollution Sources Nearby

2 EPA-permitted facilities operate within about 5 miles of Upper Sakatah Lake under Clean Water Act (NPDES) discharge permits.

  • Waterville
    Waterville · 0.4 mi away · NPDES MN0025208
  • Centerpoint Energy - Waterville
    Waterville · 2.6 mi away · NPDES MN0063967

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 #12 of 13 lakes in Le Sueur County

Nearby Lakes in Le Sueur County

Frequently asked questions about Upper Sakatah Lake

What is the water quality grade for Upper Sakatah Lake?

Upper Sakatah Lake in Le Sueur County, Minnesota has a water quality grade of F (Algae-prone). Water clarity: 3 ft visibility. Phosphorus: 303 µg/L. Chlorophyll-a (algae): 76.8 µg/L. Maximum depth: 12 ft. Surface area: 892.01 acres.

Is Upper Sakatah Lake safe to swim in?

Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. Upper Sakatah Lake has a water quality grade of F (Algae-prone). Algae concentration (chlorophyll-a) is 76.8 µg/L. Always check local health department advisories before swimming.

How deep is Upper Sakatah Lake?

Upper Sakatah Lake has a maximum depth of 12 feet. The lake covers 892.01 acres.

What fish are in Upper Sakatah Lake?

Fish species found in Upper Sakatah Lake include bigmouth buffalo, black bullhead, black crappie, bluegill, bowfin (dogfish), common carp, freshwater drum, largemouth bass, northern pike, walleye, white bass, white sucker, yellow bullhead, yellow perch. Upper Sakatah Lake is located in Le Sueur County, Minnesota.

When does Upper Sakatah Lake thaw?

Upper Sakatah Lake typically has ice-out around Mar 28. Ice typically forms around Dec 1. The open water season is approximately 248 days.

Are there boat ramps on Upper Sakatah Lake?

Upper Sakatah Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Upper Sakatah Lake, Waterville. Public access is listed as yes.

Hypereutrophic Lakes in Minnesota

Where this data comes from

21 measurements from 1 monitoring station, 2022–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

  • Minnesota Pollution Control Agency - Ambient Surface WaterMNPCA21 samples · 2022–2025

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

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

Ice data from Minnesota DNR Climate