1
AHidden Valley Lake
Washington County, Virginia · 17.9 mi from South Holston Lake
- +Higher grade (B → A)
- ++2.5 ft water clarity
- +Lower phosphorus (10 vs 20 µg/L)
Cleaner Lakes Than South Holston Lake
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
South Holston Lake carries a Grade B (Good) water quality score. Within 30 miles, 2 lakes hold a higher grade. Hidden Valley Lake (Washington County, Grade A, 17.9 mi away) is the closest meaningful upgrade.
Reviewed by LakeQuality Editorial Team · Updated
2
ALaurel Bed Lake
Russell County, Virginia · 27.2 mi from South Holston Lake
- +Higher grade (B → A)
- ++2.6 ft water clarity
- +Lower phosphorus (10 vs 20 µg/L)
Reading the cohort
Within 30 miles of South Holston Lake, 2 lakes score higher on EPA water-quality metrics than its Grade B. The short list means the alternatives are real upgrades but not interchangeable — each carries its own access, size, and species mix worth checking before substituting it into a weekend plan.
The nearest cleaner alternative — Hidden Valley Lake in Washington County — sits 17.9 miles from South Holston Lake, putting it firmly in "destination trip" rather than "neighborhood swap" range. The water-quality gap has to be the deciding factor; for a casual outing, South Holston Lake is the practical choice and the cleaner options are reserved for purpose-specific visits.
The EPA water-quality grading combines clarity (Secchi depth), phosphorus, and chlorophyll-a measurements from state environmental sampling. A higher letter grade reflects measurably cleaner water on those indicators, not subjective beauty or access quality — a Grade A lake might have worse boat-launch facilities or shoreline access than a Grade C neighbor, so the ranking is one input alongside the rest of trip planning. See the methodology page for the full grading formula.
How this list is built
Every lake on LakeQuality has a calculated grade from EPA Water Quality Portal samples — secchi depth, total phosphorus, and chlorophyll-a measured against Metropolitan Council thresholds. To suggest cleaner alternatives, we filter lakes within 30 miles to those with a strictly higher numeric score, then rank by grade improvement with a small proximity tiebreak. Cross-state and limited-data lakes are excluded so the list stays locally relevant.