Clark Lake
Clark Lake in Lake County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Maximum depth: 25 ft. Surface area: 1162.04 acres.
- Max depth
- 25 ft
- Area
- 1,162 acres
- Trend
- ↓ Declining
- Public access
- No
Next lake in Lake County
Why Clark Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Clark Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Clark Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Where to stay near Clark Lake
Compare lakeside cabins, hotels, and vacation rentals near Clark Lake in Lake 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 Clark Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 25 ft |
| Surface Area | 1,162 acres |
| Shoreline Length | 24.2 mi |
| Littoral Zone | 93% |
| Public Access | No |
Fishing Clark Lake
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.351 m/yr | 4 |
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
Source: EPA ATTAINS assessment unit MN38-0813-00 · Official waterbody report · Matched by proximity (0.27 km)
Nearby Lakes in Lake County
Frequently asked questions about Clark Lake
What is the water quality grade for Clark Lake?
- Clark Lake in Lake County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Maximum depth: 25 ft. Surface area: 1162.04 acres.
Is Clark Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Clark Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Clark Lake?
- Clark Lake has a maximum depth of 25 feet. The lake covers 1162.04 acres.
Explore Clark Lake across LakeGrade
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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)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder