Lake Lanier Upstream From Flowery Branch Confluence
Hall County, GeorgiaView mapDirections
Nutrients and algae sit mid-range for this region.
↓ down from B at the last regrade
- Mesotrophic
- Impaired · Algal growth
- #2 of 3 in the county
- Public access
Lake Lanier Upstream From Flowery Branch Confluence in Hall County, Georgia has a water quality grade of C (Fair). Water clarity: 13 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 6.2 µg/L.
- Clarity
- 13 ft
- Type
- Mesotrophic
- Phosphorus
- 20 µg/L
- Chlorophyll-a
- 6.2 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Lake Lanier Upstream From Flowery Branch Confluence’s letter
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Lake Lanier Upstream From Flowery Branch Confluence is a mesotrophic lake in Hall County, Georgia. Water quality is graded C based on 2 sampling years through 2025. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 19 public boat landings. Compared to the 2 other monitored lakes in Hall County, Lake Lanier Upstream From Flowery Branch Confluence ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Georgia EPD, last sampled 2025-10-07. Grade methodology: LakeQuality methodology.
What Lake Lanier Upstream From Flowery Branch Confluence is good for
From access and monitoring records, not editorial picks.
- Clear water13 ft of visibility
- Boat launch19 documented ramps
Swimming Safety
Grade onlyModerate
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The C is nutrients and algae, not a swimming clearance. Lake Lanier Upstream From Flowery Branch Confluence is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, pCBs. Check local advisories before you swim.
Get alerts for Lake Lanier Upstream From Flowery Branch Confluence →
Water Quality Grade: C (Fair)
Good clarity, visible to about 13 ft. Phosphorus 20 µg/L. Chlorophyll-a 6.2 µg/L. TSI 45. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13 ft | Not graded |
| Phosphorus | 20 µg/L | Fair |
| Chlorophyll-a (Algae) | 6.2 µg/L | Fair |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Recreation & Access
- Bethel ParkPublic
- Big CreekPublic
- Burton MillPublic
- Charleston ParkPublic
- Shady Grove ParkPublic
- Shoal Creek ParkPublic
Showing 6 of 19 documented landings from the USGS National Boat Ramps inventory.
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Lanier Upstream From Flowery Branch Confluence
Water Quality Trend: ↓ Declining
Based on 14 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.04 m/yr | 14 |
| Phosphorus | → Stable | 0 µg/L/yr | 6 |
| Chlorophyll-a | ↓ Declining | +0.42 µg/L/yr | 14 |
EPA Impairment Status
Lake Lanier Upstream From Flowery Branch Confluence is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit GAR031300010820 · Official waterbody report · Matched by proximity (1.06 km)
County Ranking
Ranked #2 of 3 lakes in Hall County
Nearby Lakes in Hall County
Frequently asked questions about Lake Lanier Upstream From Flowery Branch Confluence
Where is Lake Lanier Upstream From Flowery Branch Confluence?
- Lake Lanier Upstream From Flowery Branch Confluence is a lake in Hall County, Georgia. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Lanier Upstream From Flowery Branch Confluence?
- Lake Lanier Upstream From Flowery Branch Confluence in Hall County, Georgia has a water quality grade of C (Fair). Water clarity: 13 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 6.2 µg/L.
Is Lake Lanier Upstream From Flowery Branch Confluence safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Lake Lanier Upstream From Flowery Branch Confluence is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, pCBs. Check local advisories before you swim.
Are there boat ramps on Lake Lanier Upstream From Flowery Branch Confluence?
- Lake Lanier Upstream From Flowery Branch Confluence has 19 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Bethel Park, Big Creek, Burton Mill, Charleston Park, among others. Public access is listed as yes.
Explore Lake Lanier Upstream From Flowery Branch Confluence across LakeQuality
3.8 mi away · cable-pulled, no boat wake
Species activity outlook by water temperature and season
Where to stay at Georgia's top lakes, each with its grade
Moderate nutrients, good water quality
Georgia's cleanest and most-polluted lakes, ranked
Planning a trip around Chattahoochee River?
Lake Lanier Upstream From Flowery Branch Confluence is about 22 miles from Chattahoochee River National Recreation Area. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Chattahoochee River →More Georgia Lake Rankings
Other Grade C Lakes in Georgia
Mesotrophic Lakes in Georgia
Where this data comes from
284 measurements from 1 monitoring station, 2012–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Georgia DNR Environmental Protection Division
21GAEPD_WQX284 samples · 2012–2025
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- Turbidity by Nephelometry
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory