Lake Oconee is a productive, nutrient-rich eutrophic lake in Greene County, Georgia. Water quality is graded C based on 1 sampling years through 2025. Compared to the 1 other monitored lakes in Greene County, Lake Oconee ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Georgia DNR, last sampled 2025-10-08. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C, Fair
Very murky, less than 3.3 ft of visibility. Chlorophyll-a: 18 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 18 µg/L | C |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Oconee
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Fishing Lake Oconee
Location
County Ranking
Ranked #2 of 2 lakes in Greene County
Nearby Lakes in Greene County
Explore Lake Oconee across LakeGrade
More Georgia Lake Rankings
Other Grade C Lakes in Georgia
Eutrophic Lakes in Georgia
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: 2025-10-08
Monitoring stations: 1