Walnut Lake
Tunica County, MississippiView mapDirections
MDEQ publishes the water-quality measurements for Walnut Lake. Here is what has been measured.
- Hypereutrophic
- Impaired · Oxygen depletion (low DO)
- Public access
Walnut Lake in Tunica County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 85 µg/L. Chlorophyll-a (algae): 46.6 µg/L.
Walnut Lake is a highly nutrient-loaded hypereutrophic lake in Tunica County, Mississippi. Limited fish-species data available. Public access is available. Compared to the 3 other monitored lakes in Tunica County, Walnut Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-10-14. Methodology: how these readings are compared.
Swimming conditions
Readings onlyAlgae risk
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. Walnut Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for oxygen depletion (low DO). Check local advisories before you swim.
Whether Walnut Lake is safe to swim in today is a call for the Mississippi Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Walnut Lake
These are the measurements MDEQ publishes for Walnut 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 1.6 ft of visibility. Phosphorus 85 µg/L. Chlorophyll-a 46.6 µg/L. TSI 69.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 85µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 46.6µg/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 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Walnut Lake
Answers come straight from the public measurements and survey records on this page.
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Stays near Walnut Lake
Compare lakeside cabins, hotels, and vacation rentals near Walnut Lake in Tunica County, Mississippi — 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 Walnut Lake are listed below.
Top-rated places to stay near Walnut Lake
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Fishing Walnut Lake
EPA Impairment Status
Walnut 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: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MS931011 · Official waterbody report
Nearby Lakes in Tunica County
Frequently asked questions about Walnut Lake
Where is Walnut Lake?
- Walnut Lake is a lake in Tunica County, Mississippi. Its water-quality measurements are published by MDEQ and shown on this page as reported.
What is the water quality of Walnut Lake?
- Walnut Lake in Tunica County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 85 µg/L. Chlorophyll-a (algae): 46.6 µg/L.
Is Walnut Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Walnut Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for oxygen depletion (low DO). Check local advisories before you swim.
Can I fish at Walnut Lake?
- Public access to Walnut Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Mississippi's fish and wildlife agency, so check its current regulations before you go.
Explore Walnut Lake across LakeQuality
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Where this data comes from
201 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY
21MSWQ_WQX201 samples · 2020–2025
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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