Simpson Legion State Fishing Lake
Simpson County, Mississippi77 acresView mapDirections
MDEQ publishes the water-quality measurements for Simpson Legion State Fishing Lake. Here is what has been measured.
- Eutrophic
- Public access
- Limited data
Simpson Legion State Fishing Lake in Simpson County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 4.9 ft visibility. Phosphorus: 130 µg/L. Chlorophyll-a (algae): 23.4 µg/L. Surface area: 77 acres.
Simpson Legion State Fishing Lake is a 77-acre productive, nutrient-rich eutrophic lake in Simpson County, Mississippi. Limited fish-species data available. Public access is available.
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 Simpson Legion State Fishing 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 Simpson Legion State Fishing Lake
These are the measurements MDEQ publishes for Simpson Legion State Fishing 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 130 µg/L. Chlorophyll-a 23.4 µg/L. TSI 63.
| 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 | 130µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 23.4µg/L | Fair GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 63 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Simpson Legion State Fishing Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
77 acres
Public access
Yes
Listed by MDEQ
No bathymetric survey has been published for Simpson Legion State Fishing Lake, so its depth is not documented here.
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Stays near Simpson Legion State Fishing Lake
Compare lakeside cabins, hotels, and vacation rentals near Simpson Legion State Fishing Lake in Simpson 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 Simpson Legion State Fishing Lake are listed below.
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Fishing Simpson Legion State Fishing Lake
Reservoir Info (USACE NID)
Simpson Legion State Fishing Lake is a man-made reservoir impounded by the Simpson Legion Lake Dam (completed 1950), built primarily for recreation on the Sellers Creek; earth-type dam, 30 ft tall and 1,100 ft long.
- Surface area
- 77 ac
- Normal storage
- 847 ac-ft
- Max storage
- 1,672 ac-ft
- Drainage area
- 4.18 sq mi
- Hazard class
- High
- Owner
- MISSISSIPPI DEPARTMENT OF WILDLIFE FISHERIES AND PARKS
Source: USACE National Inventory of Dams, NID ID MS00123 · Operator website · Matched by proximity (0.07 km)
Nearby Lakes in Simpson County
Frequently asked questions about Simpson Legion State Fishing Lake
Where is Simpson Legion State Fishing Lake?
- Simpson Legion State Fishing Lake is a lake in Simpson County, Mississippi. Its water-quality measurements are published by MDEQ and shown on this page as reported.
What is the water quality of Simpson Legion State Fishing Lake?
- Simpson Legion State Fishing Lake in Simpson County, Mississippi has water-quality measurements published by MDEQ, shown here as reported. Water clarity: 4.9 ft visibility. Phosphorus: 130 µg/L. Chlorophyll-a (algae): 23.4 µg/L. Surface area: 77 acres.
Is Simpson Legion State Fishing Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Can I fish at Simpson Legion State Fishing Lake?
- Public access to Simpson Legion State Fishing Lake is listed as yes on the lake record. 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.
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Where this data comes from
28 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_WQX28 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.