Bay Tree Lake
Bladen County, North CarolinaView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↑ up from C at the last regrade
- Eutrophic
- #1 of 5 in the county
- 28 ft max depth
- Limited data
Bay Tree Lake in Bladen County, North Carolina has a water quality grade of B (Good). Water clarity: 2.4 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 8.8 µg/L.
- Clarity
- 2.4 ft
- Max depth
- ~28 ft est.
- Type
- Eutrophic
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Watch Bay Tree Lake’s letter
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Bay Tree Lake is a productive, nutrient-rich eutrophic lake in Bladen County, North Carolina with an estimated average depth of about 28 feet. Water quality is graded B based on 1 sampling years through 2023. Compared to the 4 other monitored lakes in Bladen County, Bay Tree Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, NCDEQ, last sampled 2023-09-18. Grade methodology: LakeQuality methodology.
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.
The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
Very murky, less than 2.4 ft of visibility. Phosphorus 30 µg/L. Chlorophyll-a 8.8 µg/L. TSI 57. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.4 ft | Not graded |
| Phosphorus | 30 µg/L | Not graded |
| Chlorophyll-a (Algae) | 8.8 µg/L | Good |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~28 ft est. |
| Average Depth | ~5 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. North Carolina has not published bathymetry for Bay Tree 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 Bay Tree Lake
County Ranking
Ranked #1 of 5 lakes in Bladen County
Nearby Lakes With Higher Grades
Bay Tree Lake holds Grade B. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Bladen County
Frequently asked questions about Bay Tree Lake
Where is Bay Tree Lake?
- Bay Tree Lake is a lake in Bladen County, North Carolina. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Bay Tree Lake?
- Bay Tree Lake in Bladen County, North Carolina has a water quality grade of B (Good). Water clarity: 2.4 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 8.8 µg/L.
Is Bay Tree Lake safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Bay Tree Lake?
- No published bathymetric survey covers Bay Tree Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 28 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Bay Tree Lake across LakeQuality
Species activity outlook by water temperature and season
Where to stay at North Carolina's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
North Carolina's cleanest and most-polluted lakes, ranked
More North Carolina Lake Rankings
Ranked by overall water quality grade
Top 25 by Secchi water clarity
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Full state directory
Other Grade B Lakes in North Carolina
Eutrophic Lakes in North Carolina
Where this data comes from
40 measurements from 2 monitoring stations, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Carolina Dept of Environmental Quality NCDEQ-DWR WQX
21NC03WQ40 samples · 2023
Analytical methods
- WSSSOP
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (2)
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)