Beech River Lake
Decatur County, TennesseeView mapDirections
TDEC publishes the water-quality measurements for Beech River Lake. Here is what has been measured.
- Eutrophic
Beech River Lake in Decatur County, Tennessee has water-quality measurements published by TDEC, shown here as reported. Phosphorus: 96 µg/L.
Beech River Lake is a productive, nutrient-rich eutrophic lake in Decatur County, Tennessee.
Source: EPA Water Quality Portal sampling records, TDEC, last sampled 2026-04-20. Methodology: how these readings are compared.
Swimming conditions
Readings onlyElevated nutrients
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 Beech River Lake is safe to swim in today is a call for the Tennessee Department of Environment and Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Beech River Lake
These are the measurements TDEC publishes for Beech River Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 96 µg/L. TSI 70.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 96µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 70 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Beech River Lake
Answers come straight from the public measurements and survey records on this page.
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 readings cover nutrients and algae, not lodging. Cabins and rentals around Beech River Lake are listed below.
Top-rated places to stay near Beech River Lake
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Tennessee’s top lakes →
Follow Beech River Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Beech River Lake
Water Quality Trend: Stable
Based on 11 years of monitoring (2012–2025).
Phosphorus
Stable+1.21 µg/L/yr11 years
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. Its water-quality measurements are published by TDEC and shown on this page as reported.
What is the water quality of Beech River Lake?
- Beech River Lake in Decatur County, Tennessee has water-quality measurements published by TDEC, shown here as reported. Phosphorus: 96 µg/L.
Is Beech River Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Beech River Lake across LakeQuality
More lakes in Tennessee
Other Lakes in Tennessee
Eutrophic Lakes in Tennessee
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)
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.