Geoh Lake
Stewart County, GeorgiaView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↑ up from C at the last regrade
- Eutrophic
- #1 of 1 in the county
- Public access
Geoh Lake in Stewart County, Georgia has a water quality grade of B (Good). Water clarity: 3.7 ft visibility. Phosphorus: 31.5 µg/L. Chlorophyll-a (algae): 11.7 µg/L.
- Clarity
- 3.7 ft
- Type
- Eutrophic
- Phosphorus
- 31.5 µg/L
- Chlorophyll-a
- 11.7 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Geoh Lake’s letter
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Geoh Lake is a productive, nutrient-rich eutrophic lake in Stewart County, Georgia. Water quality is graded B based on 2 sampling years through 2024. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, Georgia EPD, last sampled 2024-10-29. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLow algae
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 B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
Murky, only visible to about 3.7 ft. Phosphorus 31.5 µg/L. Chlorophyll-a 11.7 µg/L. TSI 56. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.7 ft | Not graded |
| Phosphorus | 31.5 µg/L | Good |
| Chlorophyll-a (Algae) | 11.7 µg/L | Good |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Geoh Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.007 m/yr | 5 |
| Phosphorus | ↓ Declining | +1.33 µg/L/yr | 2 |
| Chlorophyll-a | ↓ Declining | +0.54 µg/L/yr | 5 |
County Ranking
Ranked #1 of 1 lakes in Stewart County
Nearby Lakes in Stewart County
Frequently asked questions about Geoh Lake
Where is Geoh Lake?
- Geoh Lake is a lake in Stewart County, Georgia. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Geoh Lake?
- Geoh Lake in Stewart County, Georgia has a water quality grade of B (Good). Water clarity: 3.7 ft visibility. Phosphorus: 31.5 µg/L. Chlorophyll-a (algae): 11.7 µg/L.
Is Geoh Lake safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Geoh Lake across LakeQuality
More Georgia Lake Rankings
Other Grade B Lakes in Georgia
Eutrophic Lakes in Georgia
Where this data comes from
116 measurements from 1 monitoring station, 2012–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- ALABAMA DEPT. OF ENVIRONMENTAL MANAGEMENT - WATER QUALITY DATA
21AWIC116 samples · 2012–2024
Analytical methods
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- 2120 B ~ Color in Water by Visual Comparison
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.