Horn Lake
DeSoto County, MississippiView mapDirections
MDEQ publishes the water-quality measurements for Horn Lake. Here is what has been measured.
- Hypereutrophic
- Public access
- Limited data
Horn Lake in DeSoto County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 125 µg/L. Chlorophyll-a (algae): 64.9 µg/L.
Horn Lake is a highly nutrient-loaded hypereutrophic lake in DeSoto County, Mississippi. 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. Methodology: how these readings are compared.
What Horn Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyLimited data
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. Check local advisories before you swim.
Whether Horn 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 Horn Lake
These are the measurements MDEQ publishes for Horn 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 125 µg/L. Chlorophyll-a 64.9 µg/L. TSI 72.
| 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 | 125µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 64.9µg/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. | 72 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Horn Lake
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
- Lakeview RoadPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Horn Lake are listed below.
Top-rated places to stay near Horn Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
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Fishing Horn Lake
Nearby Lakes in DeSoto County
Frequently asked questions about Horn Lake
Where is Horn Lake?
- Horn Lake is a lake in DeSoto County, Mississippi. Its water-quality measurements are published by MDEQ and shown on this page as reported.
What is the water quality of Horn Lake?
- Horn Lake in DeSoto County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 125 µg/L. Chlorophyll-a (algae): 64.9 µg/L.
Is Horn Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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.
Can I fish at Horn Lake?
- Horn Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. 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 Horn Lake across LakeQuality
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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)
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
Named boat-access points from the USGS National Boat Ramps inventory