Clark Lake
Lake County, Minnesota1,162 acresView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Impaired · Mercury
- 25 ft max depth
- Limited data
Clark Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 25 ft. Surface area: 1162.04 acres.
Clark Lake is a 1,162-acre lake in Lake County, Minnesota with a maximum depth of 25 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-05-30. Methodology: how these readings are compared.
What Clark Lake is good for
From access and monitoring records, not editorial picks.
- Big water1,162 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Clark Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Clark 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 Clark Lake
These are the measurements Minnesota PCA publishes for Clark Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Clark Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
25 ft
Surface area
1,162 acres
Shoreline
24.2 mi
Littoral zone
93%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
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Stays near Clark Lake
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Fishing Clark Lake
Water Quality Trend: Worsening
Based on 4 years of monitoring (2021–2025).
Water clarity
Worsening4 years
EPA Impairment Status
Clark Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit MN38-0813-00 · Official waterbody report
Nearby Lakes in Lake County
Frequently asked questions about Clark Lake
Where is Clark Lake?
- Clark Lake is a lake in Lake County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Clark Lake?
- Clark Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 25 ft. Surface area: 1162.04 acres.
Is Clark Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Clark Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Clark Lake?
- Clark Lake has a maximum depth of 25 feet. The lake covers 1162.04 acres.
Can I fish at Clark Lake?
- Public access to Clark Lake is listed as no on the lake record, so confirm before you make the trip. 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 Clark Lake across LakeQuality
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Where this data comes from
1 measurement 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
MNPCA1 sample · 2025
Analytical methods
- Field measurement/observation, generic method
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 details from Minnesota DNR LakeFinder