Tennessee River Lake is a productive, nutrient-rich eutrophic lake in Marion County, Tennessee. Water quality is graded C based on 1 sampling years through 2026. Compared to the 2 other monitored lakes in Marion County, Tennessee River Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Tennessee DNR, last sampled 2026-06-10. Grade methodology: LakeGrade methodology.
Watch Tennessee River Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 7.6 ft. Phosphorus level: 35.8 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.6 ft | C |
| Phosphorus | 35.8 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Tennessee River Lake
Compare lakeside cabins, hotels, and vacation rentals near Tennessee River Lake in Marion 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.
Top-rated places to stay near Tennessee River Lake
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 trip to Tennessee River Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Tennessee River Lake — straight to your inbox. No spam, unsubscribe anytime.
Fishing Tennessee River Lake
Location
County Ranking
Ranked #2 of 3 lakes in Marion County
Cleaner Lakes Within 30 Miles
Tennessee River Lake holds Grade C. One nearby lake has a higher grade.
Nearby Lakes in Marion County
Explore Tennessee River Lake across LakeGrade
More Tennessee Lake Rankings
Other Grade C Lakes in Tennessee
Eutrophic Lakes in Tennessee
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2026-06-10
Monitoring stations: 1