Bois D Arc Lake
Hempstead County, ArkansasView mapDirections
Nutrients and algae run well above the regional average.
- Hypereutrophic
- #1 of 1 in the county
- 21 ft max depth
Bois D Arc Lake in Hempstead County, Arkansas has a water quality grade of F (Algae-prone). Phosphorus: 200 µg/L. Chlorophyll-a (algae): 137 µg/L.
- Max depth
- ~21 ft est.
- Type
- Hypereutrophic
- Phosphorus
- 200 µg/L
- Chlorophyll-a
- 137 µg/L
- Trend
- ↓ Declining
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Bois D Arc Lake is a highly nutrient-loaded hypereutrophic lake in Hempstead County, Arkansas with an estimated average depth of about 21 feet. Water quality is graded F based on 3 sampling years through 2024. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2024-07-08. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyAlgae risk
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.
The F is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: F (Algae-prone)
No clarity data. Phosphorus 200 µg/L. Chlorophyll-a 137 µg/L. TSI 80. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 200 µg/L | Poor |
| Chlorophyll-a (Algae) | 137 µg/L | Poor |
| Trophic State Index (TSI) | 80 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~21 ft est. |
| Average Depth | ~13 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Arkansas has not published bathymetry for Bois D Arc Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Bois D Arc Lake
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +7.14 µg/L/yr | 4 |
| Chlorophyll-a | → Stable | +1.36 µg/L/yr | 4 |
County Ranking
Ranked #1 of 1 lakes in Hempstead County
Nearby Lakes in Hempstead County
Frequently asked questions about Bois D Arc Lake
Where is Bois D Arc Lake?
- Bois D Arc Lake is a lake in Hempstead County, Arkansas. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Bois D Arc Lake?
- Bois D Arc Lake in Hempstead County, Arkansas has a water quality grade of F (Algae-prone). Phosphorus: 200 µg/L. Chlorophyll-a (algae): 137 µg/L.
Is Bois D Arc Lake safe to swim in?
- The F is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Bois D Arc Lake?
- No published bathymetric survey covers Bois D Arc Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 21 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Bois D Arc Lake across LakeQuality
Species activity outlook by water temperature and season
Where to stay at Arkansas's top lakes, each with its grade
Very high nutrients, dense algae, poor clarity
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Where this data comes from
92 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Arkansas Department of Environmental Quality
ARDEQH2O_WQX92 samples · 2020–2024
Analytical methods
- 4500 P J ~ Persulfate Method for Simultaneous Determination of Total Nitrogen and Total Phosphorus
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- Turbidity by Nephelometry
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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)