Cumberland River Lake
Wilson County, TennesseeView mapDirections
Nutrients and algae run above the regional average.
↓ down from C at the last regrade
- Eutrophic
- #1 of 1 in the county
- Public access
Cumberland River Lake in Wilson County, Tennessee has a water quality grade of D (Nutrient-rich). Phosphorus: 35 µg/L.
- Type
- Eutrophic
- Phosphorus
- 35 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
Stays via Stay22
Stays near Cumberland River Lake
Compare lakeside cabins, hotels, and vacation rentals near Cumberland River Lake in Wilson 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 Cumberland River Lake are listed below.
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Cumberland River Lake is a productive, nutrient-rich eutrophic lake in Wilson County, Tennessee. Water quality is graded D based on 1 sampling years through 2026. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, TDEC, last sampled 2026-05-12. 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 35 µg/L. TSI 55. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 35 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Cumberland River Lake
Water Quality Trend: ↓ Declining
Based on 12 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.25 m/yr | 3 |
| Phosphorus | ↓ Declining | +2.15 µg/L/yr | 12 |
| Chlorophyll-a | ↓ Declining | +6.15 µg/L/yr | 3 |
County Ranking
Ranked #1 of 1 lakes in Wilson County
Nearby Lakes in Wilson County
Frequently asked questions about Cumberland River Lake
Where is Cumberland River Lake?
- Cumberland River Lake is a lake in Wilson County, Tennessee. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Cumberland River Lake?
- Cumberland River Lake in Wilson County, Tennessee has a water quality grade of D (Nutrient-rich). Phosphorus: 35 µg/L.
Is Cumberland River Lake safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Cumberland 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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Other Grade D Lakes in Tennessee
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Where this data comes from
77 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_WQX77 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.