Clear Lake
Jackson County, Minnesota434 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Clear Lake. Here is what has been measured.
- Eutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- 2 aquatic invasives
- 9 ft max depth
- Public access
Clear Lake in Jackson County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 1.5 ft visibility. Phosphorus: 90.5 µg/L. Chlorophyll-a (algae): 44 µg/L. Maximum depth: 9 ft. Surface area: 434.16 acres.
Minnesota DNR's Standard Survey on June 5, 2023 caught 1.67 walleye per gill net at Clear Lake. Length samples in the latest survey that recorded them ran 6–9 inches. DNR survey details →
Clear Lake is a 434-acre productive, nutrient-rich eutrophic lake in Jackson County, Minnesota with a maximum depth of 9 feet. Overall water quality is declining over recent sampling years. The lake supports 15 documented fish species including bigmouth buffalo, black bullhead, and black crappie. Public access is available with 2 public boat landings. Compared to the 5 other monitored lakes in Jackson County, Clear Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-09-11. Methodology: how these readings are compared.
What Clear Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
- Fishing15 species recorded
Swimming conditions
Readings onlyRecreation use not supported
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. Clear Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Clear 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 Clear Lake
These are the measurements Minnesota PCA publishes for Clear 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 1.5 ft of visibility. Phosphorus 90.5 µg/L. Chlorophyll-a 44 µg/L. TSI 69.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 90.5µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 44µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 69 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Clear Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Clear Lake typically sits around 71°F at the surface in September. Summer average is about 75°F. Usually warmest in Jul (about 78°F) and coldest in May (about 56°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (56°F) to its warmest (78°F).
Typical surface water temperature by month, from 35 field readings (2010–2023) via the EPA Water Quality Portal. See the full Clear Lake water temperature breakdown →
Blue-Green Algae (Cyanobacteria)
There’s no recent EPA CyAN cyanobacteria estimate for Clear Lake — clouds, ice, or an off-season gap in coverage. The most recent reading was high (990,832 cells/mL) on July 18, 2026.
Blue-green algae can appear and clear within days, so check your state’s current advisory before swimming. EPA CyAN ↗
Minnesota DNR's Standard Survey on June 5, 2023 caught 1.67 walleye per gill net at Clear Lake. Length samples in the latest survey that recorded them ran 6–9 inches.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Clear Lake’s water-quality measurements separately, and the water-quality trend over 2 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
22 surveys on file from MN DNR Fisheries. Most recent: 2023-09-21 (Targeted Survey).
22 surveys on file · most recent 2023-09-21 (Targeted Survey)
| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Black Bullhead | 62.13 | 11 in 2023-06-05 | 0.65 lb |
| Walleye | 25.11 | 6–9 in 2023-09-21 | 1.91 lb |
| Yellow Perch | 23.23 | 7–12 in 2019-06-03 | 0.34 lb |
| Green Sunfish | 10.54 | 3–4 in 1999-07-12 | 0.05 lb |
| Freshwater Drum | 4.70 | 5–18 in 2023-06-05 | 1.53 lb |
CPUE = catch per unit effort, fish caught per net per set in a standardised survey. It measures abundance, not size, and is not a weekly bite report.
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
Walleye
Yellow Perch
Green Sunfish
From the 2023-09-21 survey
Clear Lake is a 415-acre, class 43 lake, located four miles west of the City of Jackson in Jackson County. The lake has a maximum depth of 9.0 feet and a shoreline length of 3.8 miles. Clear Lake has historically been a good Walleye fishery and therefore is managed primarily for Walleye. Secondary management species…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Clear Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — ClearFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — ClearFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — ClearPublic Water Access Sites · MN DNR LakeFinder
Lake Details
Max depth
9 ft
Surface area
434 acres
Shoreline
3.8 mi
Littoral zone
100%
Share shallower than 15 ft
Public access
Yes
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
3 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,490 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Clear Lake (South)Public
- Clear Lake (North)Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Clear Lake
Compare lakeside cabins, hotels, and vacation rentals near Clear Lake in Jackson 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Clear Lake are listed below.
Top-rated places to stay near Clear 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 →
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Fish Species
Click a species to see every lake where it is documented.
Fishing Clear 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.
Water quality readings over time
2 seasons of samples on record (2022–2023). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving2 years
Phosphorus
Worsening+4 µg/L/yr2 years
Chlorophyll-a
Worsening+16.1 µg/L/yr2 years
EPA Impairment Status
Clear Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN32-0022-00 · Official waterbody report
Nearby Lakes in Jackson County
Frequently asked questions about Clear Lake
Where is Clear Lake?
- Clear Lake is a lake in Jackson County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Clear Lake?
- Clear Lake in Jackson County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 1.5 ft visibility. Phosphorus: 90.5 µg/L. Chlorophyll-a (algae): 44 µg/L. Maximum depth: 9 ft. Surface area: 434.16 acres.
Is Clear Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Clear Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
What is the water temperature of Clear Lake?
- Clear Lake typically sits around 71°F at the surface in September, from 35 EPA Water Quality Portal field readings (2010–2023). That is a typical value for the month, not a live reading.
How deep is Clear Lake?
- Clear Lake has a maximum depth of 9 feet. The lake covers 434.16 acres.
What fish are in Clear Lake?
- Fish species found in Clear Lake include bigmouth buffalo, black bullhead, black crappie, bluegill, channel catfish, common carp, freshwater drum, green sunfish, largemouth bass, northern pike, smallmouth bass, walleye, yellow bass, yellow bullhead, yellow perch. Clear Lake is located in Jackson County, Minnesota.
What did the DNR fisheries survey find at Clear Lake?
- Minnesota DNR's Standard Survey on June 5, 2023 caught 1.67 walleye per gill net at Clear Lake. Length samples in the latest survey that recorded them ran 6–9 inches. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Clear Lake’s water-quality measurements separately, and the water-quality trend over 2 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Does Clear Lake have blue-green algae?
- There is no recent EPA CyAN cyanobacteria estimate for Clear Lake (clouds, ice, or an off-season gap). The most recent reading was high (990,832 cells/mL). Blue-green algae can appear and clear within days, so check Minnesota's current advisory before swimming.
Are there boat ramps on Clear Lake?
- Clear Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Clear Lake (South), Clear Lake (North). Public access is listed as yes.
Can I fish at Clear Lake?
- Clear Lake has 2 documented boat landings 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 Clear Lake across LakeQuality
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Where this data comes from
30 measurements from 1 monitoring station, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA30 samples · 2022–2023
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
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