Lake Lanier Upstream From Flowery Branch Confluence is a mesotrophic lake in Hall County, Georgia. Water quality is graded B based on 1 sampling years through 2025. Compared to the 3 other monitored lakes in Hall County, Lake Lanier Upstream From Flowery Branch Confluence ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Georgia DNR, last sampled 2025-10-07. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 12.8 ft. Chlorophyll-a: 6.2 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12.8 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 6.2 µg/L | B |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Lanier Upstream From Flowery Branch Confluence
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Fishing Lake Lanier Upstream From Flowery Branch Confluence
Location
County Ranking
Ranked #1 of 4 lakes in Hall County
Nearby Lakes in Hall County
Explore Lake Lanier Upstream From Flowery Branch Confluence across LakeGrade
More Georgia Lake Rankings
Other Grade B Lakes in Georgia
Mesotrophic 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: 2025-10-07
Monitoring stations: 1