Horn Lake
Horn Lake in DeSoto County, Mississippi has a water quality grade of F (Algae-prone). Water clarity: 1.6 ft visibility. Phosphorus: 125 µg/L. Chlorophyll-a (algae): 64.9 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 Horn Lake →
Horn Lake is a highly nutrient-loaded hypereutrophic lake in DeSoto 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.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-10-23. Grade methodology: LakeGrade methodology.
Watch Horn Lake water quality
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Swimming Safety
Grade onlyLimited data
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: 125 µg/L. Chlorophyll-a: 64.9 µg/L. Trophic State Index: 72.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | Not graded |
| Phosphorus | 125 µg/L | Poor |
| Chlorophyll-a (Algae) | 64.9 µg/L | Poor |
| Trophic State Index (TSI) | 72 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Horn Lake
Compare lakeside cabins, hotels, and vacation rentals near Horn Lake in DeSoto 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 Horn Lake are listed below.
Top-rated places to stay near Horn Lake
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Recreation & Access
- Lakeview RoadPublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Horn Lake
County Ranking
Ranked #1 of 1 lakes in DeSoto County
Nearby Lakes in DeSoto County
Frequently asked questions about Horn Lake
Where is Horn Lake?
- Horn Lake is a lake in DeSoto County, Mississippi. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Horn Lake?
- Horn Lake in DeSoto County, Mississippi has a water quality grade of F (Algae-prone). Water clarity: 1.6 ft visibility. Phosphorus: 125 µg/L. Chlorophyll-a (algae): 64.9 µg/L.
Is Horn 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. Horn Lake has a water quality grade of F (Algae-prone). Algae concentration (chlorophyll-a) is 64.9 µg/L. Always check local health department advisories before swimming.
Are there boat ramps on Horn Lake?
- Horn Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lakeview Road. Public access is listed as yes.
Explore Horn Lake across LakeGrade
More Mississippi Lake Rankings
Other Grade F Lakes in Mississippi
Hypereutrophic Lakes in Mississippi
Where this data comes from
39 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY
21MSWQ_WQX39 samples · 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
Named boat-access points from the USGS National Boat Ramps inventory