Hall County Lake Quality
Georgia, 4 lakes, average grade B (Good)
Hall County has 4 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
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. Lake Lanier Upstream From Flowery Branch Confluence (B) is the cleanest in the county.
Quick Answers for Hall County
Planning a trip? Check special fishing regulations for Lake Lanier Upstream From Flowery Branch Confluence — or check the official Georgia fishing regulations.
All Lakes in Hall County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Lanier Upstream From Flowery Branch Confluence | B | 12.8 ft | - |
| 2 | Lake Sidney Lanier | B | - | - |
| 3 | Lake Sidney Lanier | C | 6.6 ft | - |
| 4 | Lake Sidney Lanier | C | 7.5 ft | - |
Other Counties in Georgia
See how Hall 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 Hall County
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Source: EPA National Aquatic Resource Surveys, 2026.