Hennington Lake
Hennington Lake in Lamar County, Mississippi has a water quality grade of C (Fair). Water clarity: 4.9 ft visibility. Phosphorus: 80 µg/L. Chlorophyll-a (algae): 8.9 µg/L.
- Clarity
- 4.9 ft
- Type
- Eutrophic
Hennington Lake is a productive, nutrient-rich eutrophic lake in Lamar County, Mississippi. Water quality is graded C based on 2 sampling years through 2025. 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. Grade methodology: LakeGrade methodology.
Watch Hennington Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Murky, only visible to about 4.9 ft. Phosphorus level: 80 µg/L. Chlorophyll-a: 8.9 µg/L. Trophic State Index: 58.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.9 ft | Not graded |
| Phosphorus | 80 µg/L | Poor |
| Chlorophyll-a (Algae) | 8.9 µg/L | Good |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Hennington Lake
Compare lakeside cabins, hotels, and vacation rentals near Hennington Lake in Lamar 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.
Top-rated places to stay near Hennington Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
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)
County Ranking
Ranked #2 of 3 lakes in Lamar County
Nearby Lakes in Lamar County
Frequently asked questions about Hennington Lake
Where is Hennington Lake?
- Hennington Lake is a lake in Lamar County, Mississippi. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Hennington Lake?
- Hennington Lake in Lamar County, Mississippi has a water quality grade of C (Fair). Water clarity: 4.9 ft visibility. Phosphorus: 80 µg/L. Chlorophyll-a (algae): 8.9 µg/L.
Is Hennington Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Hennington Lake has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 8.9 µg/L. Always check local health department advisories before swimming.
Explore Hennington Lake across LakeGrade
More Mississippi Lake Rankings
Other Grade C Lakes in Mississippi
Eutrophic Lakes in Mississippi
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)
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.