Beech River Lake
Decatur County, TennesseeView mapDirections
Nutrients and algae run above the regional average.
- Eutrophic
- #1 of 1 in the county
Beech River Lake in Decatur County, Tennessee has a water quality grade of D (Nutrient-rich). Phosphorus: 96 µg/L.
- Type
- Eutrophic
- Phosphorus
- 96 µg/L
- Trend
- → Stable
Stays via Stay22
Stays near Beech River Lake
Compare lakeside cabins, hotels, and vacation rentals near Beech River Lake in Decatur County, Tennessee — 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 grade measures nutrients and algae, not lodging — cabins and rentals around Beech River Lake are listed below.
Top-rated places to stay near Beech River Lake
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Watch Beech River Lake’s letter
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Beech River Lake is a productive, nutrient-rich eutrophic lake in Decatur County, Tennessee. Water quality is graded D based on 1 sampling years through 2026.
Source: EPA Water Quality Portal sampling records, TDEC, last sampled 2026-04-20. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyElevated nutrients
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 D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus 96 µg/L. TSI 70. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 96 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 70 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Beech River Lake
Water Quality Trend: → Stable
Based on 11 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | → Stable | +1.21 µg/L/yr | 11 |
County Ranking
Ranked #1 of 1 lakes in Decatur County
Nearby Lakes in Decatur County
Frequently asked questions about Beech River Lake
Where is Beech River Lake?
- Beech River Lake is a lake in Decatur County, Tennessee. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Beech River Lake?
- Beech River Lake in Decatur County, Tennessee has a water quality grade of D (Nutrient-rich). Phosphorus: 96 µg/L.
Is Beech River Lake safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Beech River Lake across LakeQuality
Species activity outlook by water temperature and season
Where to stay at Tennessee's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
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Where this data comes from
89 measurements from 1 monitoring station, 2012–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- TDEC Division of Water Resources
TDECWR_WQX89 samples · 2012–2026
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 4500 P H ~ Manual Digestion and Flow Injection Analysis for Total Phosphorus
- Phosphorus by Colorimetry
- Turbidity by Nephelometry
- 2120 C ~ Color in Water by Spectrophotometry
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.