Union County Lake Quality
Georgia, 2 lakes, average grade B (Good)
Union County has 2 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. With an average grade of B, Union County sits comfortably above the {{stateName}} median.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Lake Nottely (B); the most-stressed is Lake Nottely (C).
Quick Answers for Union County
Planning a trip? Check special fishing regulations for Lake Nottely — or check the official Georgia fishing regulations.
All Lakes in Union County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Nottely | B | 8.9 ft | - |
| 2 | Lake Nottely | C | 6.7 ft | - |
Other Counties in Georgia
See how Union 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 Union County
Top-rated places to stay near Union County
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Source: EPA National Aquatic Resource Surveys, 2026.