Walnut Lake
Walnut Lake in Tunica County, Mississippi has a water quality grade of F (Algae-prone). Water clarity: 1.6 ft visibility. Phosphorus: 85 µg/L. Chlorophyll-a (algae): 46.6 µg/L.
- Clarity
- 1.6 ft
- Type
- Hypereutrophic
- Public access
- Yes
Grade F measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Walnut Lake →
Walnut Lake is a highly nutrient-loaded hypereutrophic lake in Tunica County, Mississippi. Water quality is graded F based on 2 sampling years through 2025. Limited fish-species data available. Public access is available with 1 public boat landing. 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. Grade methodology: LakeGrade methodology.
Watch Walnut Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyAlgae risk
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
Water Quality Grade: F (Algae-prone)
Very murky, less than 1.6 ft of visibility. Phosphorus level: 85 µg/L. Chlorophyll-a: 46.6 µg/L. Trophic State Index: 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | Not graded |
| Phosphorus | 85 µg/L | Poor |
| Chlorophyll-a (Algae) | 46.6 µg/L | Poor |
| Trophic State Index (TSI) | 69 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay 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 grade measures nutrients and algae, not lodging — cabins and rentals around Walnut Lake are listed below.
Top-rated places to stay near Walnut Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Recreation & Access
- Sarah Road BridgePublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
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
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MS931011 · Official waterbody report
County Ranking
Ranked #2 of 4 lakes in Tunica County
Nearby Lakes in Tunica County
Frequently asked questions about Walnut Lake
Where is Walnut Lake?
- Walnut Lake is a lake in Tunica County, Mississippi. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Walnut Lake?
- Walnut Lake in Tunica County, Mississippi has a water quality grade of F (Algae-prone). Water clarity: 1.6 ft visibility. Phosphorus: 85 µg/L. Chlorophyll-a (algae): 46.6 µg/L.
Is Walnut 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. Walnut Lake has a water quality grade of F (Algae-prone). Algae concentration (chlorophyll-a) is 46.6 µg/L. Always check local health department advisories before swimming.
Are there boat ramps on Walnut Lake?
- Walnut Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Sarah Road Bridge. Public access is listed as yes.
Explore Walnut Lake across LakeGrade
More Mississippi Lake Rankings
Other Grade F Lakes in Mississippi
Hypereutrophic Lakes in Mississippi
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)
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
Named boat-access points from the USGS National Boat Ramps inventory