Piney River Lake is a mesotrophic lake in Rhea County, Tennessee. Water quality is graded B based on 1 sampling years through 2026. Compared to the 1 other monitored lakes in Rhea County, Piney River Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Tennessee DNR, last sampled 2026-06-11. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 6.4 ft. Phosphorus level: 17 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.4 ft | C |
| Phosphorus | 17 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Piney River Lake
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Location
County Ranking
Ranked #1 of 2 lakes in Rhea County
Nearby Lakes in Rhea County
Explore Piney River Lake across LakeGrade
More Tennessee Lake Rankings
Other Grade B Lakes in Tennessee
Mesotrophic 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: 2026-06-11
Monitoring stations: 1