Lake Henry
Leflore County, MississippiView mapDirections
MDEQ publishes the water-quality measurements for Lake Henry. Here is what has been measured.
- Hypereutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- Limited data
Lake Henry in Leflore County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 0.8 ft visibility. Phosphorus: 170 µg/L. Chlorophyll-a (algae): 41.8 µg/L.
Lake Henry is a highly nutrient-loaded hypereutrophic lake in Leflore County, Mississippi. Compared to the 2 other monitored lakes in Leflore County, Lake Henry ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-10-23. Methodology: how these readings are compared.
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. Lake Henry is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO), salinity / chlorides. Check local advisories before you swim.
Whether Lake Henry 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 Lake Henry
These are the measurements MDEQ publishes for Lake Henry, 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 0.8 ft of visibility. Phosphorus 170 µg/L. Chlorophyll-a 41.8 µg/L. TSI 75.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 0.8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 170µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 41.8µg/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. | 75 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Lake Henry
Answers come straight from the public measurements and survey records on this page.
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Stays near Lake Henry
Compare lakeside cabins, hotels, and vacation rentals near Lake Henry in Leflore 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 Lake Henry are listed below.
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Fishing Lake Henry
EPA Impairment Status
Lake Henry is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MS938312 · Official waterbody report
Nearby Lakes in Leflore County
Frequently asked questions about Lake Henry
Where is Lake Henry?
- Lake Henry is a lake in Leflore County, Mississippi. Its water-quality measurements are published by MDEQ and shown on this page as reported.
What is the water quality of Lake Henry?
- Lake Henry in Leflore County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 0.8 ft visibility. Phosphorus: 170 µg/L. Chlorophyll-a (algae): 41.8 µg/L.
Is Lake Henry safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Henry is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO), salinity / chlorides. Check local advisories before you swim.
Explore Lake Henry across LakeQuality
More lakes in Mississippi
Other Lakes in Mississippi
Hypereutrophic Lakes in Mississippi
Where this data comes from
32 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_WQX32 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
Impairment status from EPA ATTAINS 303(d) database