Columbia County Lake Quality
Georgia, 1 lakes, average grade B (Good)
Only 1 lakes in Columbia County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. With an average grade of B, Columbia County sits comfortably above the {{stateName}} median.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Clarks Hill Lake (B) is the cleanest in the county.
Quick Answers for Columbia County
Planning a trip? Check special fishing regulations for Clarks Hill Lake — or check the official Georgia fishing regulations.
All Lakes in Columbia County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Clarks Hill Lake | B | 7.9 ft | - |
Other Counties in Georgia
See how Columbia County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 36 states.
Where to stay near Columbia County
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Source: EPA National Aquatic Resource Surveys, 2026.