Hennington Lake
Lamar County, MississippiView mapDirections
MDEQ publishes the water-quality measurements for Hennington Lake. Here is what has been measured.
- Eutrophic
- Limited data
Hennington Lake in Lamar County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 4.9 ft visibility. Phosphorus: 80 µg/L. Chlorophyll-a (algae): 8.9 µg/L.
Hennington Lake is a productive, nutrient-rich eutrophic lake in Lamar County, Mississippi. Compared to the 2 other monitored lakes in Lamar County, Hennington Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-10-28. 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. Check local advisories before you swim.
Whether Hennington 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 Hennington Lake
These are the measurements MDEQ publishes for Hennington Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.9 ft. Phosphorus 80 µg/L. Chlorophyll-a 8.9 µg/L. TSI 58.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 80µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 8.9µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 58 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Hennington Lake
Reservoir Info (USACE NID)
Hennington Lake is a man-made reservoir impounded by the Lake Serene Dam, built primarily for recreation; earth-type dam, 24 ft tall.
- Max storage
- 4,800 ac-ft
- Hazard class
- Low
Source: USACE National Inventory of Dams, NID ID MS00697 · Operator website · Matched by proximity (0.1 km)
Nearby Lakes in Lamar County
Frequently asked questions about Hennington Lake
Where is Hennington Lake?
- Hennington Lake is a lake in Lamar County, Mississippi. Its water-quality measurements are published by MDEQ and shown on this page as reported.
What is the water quality of Hennington Lake?
- Hennington Lake in Lamar County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 4.9 ft visibility. Phosphorus: 80 µg/L. Chlorophyll-a (algae): 8.9 µg/L.
Is Hennington Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Hennington Lake across LakeQuality
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Where this data comes from
42 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_WQX42 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.