Putnam-Fanny Lake
Putnam County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Putnam-Fanny Lake. Here is what has been measured.
- Oligotrophic
- Impaired · pH / acidity
- 51 ft max depth
Putnam-Fanny Lake in Putnam County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 11.5 ft visibility. Phosphorus: 8 µg/L.
Putnam-Fanny Lake is a cold, clear oligotrophic lake in Putnam County, Florida with an estimated average depth of about 51 feet. Overall water quality is declining over recent sampling years. Compared to the 27 other monitored lakes in Putnam County, Putnam-Fanny Lake ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-22. Methodology: how these readings are compared.
What Putnam-Fanny Lake is good for
From access and monitoring records, not editorial picks.
- Clear water11.5 ft of visibility
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Putnam-Fanny Lake is listed impaired under Clean Water Act §303(d) (IR 4C) for pH / acidity. Check local advisories before you swim.
Whether Putnam-Fanny Lake is safe to swim in today is a call for the Florida Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Putnam-Fanny Lake
These are the measurements Florida DEP publishes for Putnam-Fanny Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 11.5 ft. Phosphorus 8 µg/L. TSI 38.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 11.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 8µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 38 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Putnam-Fanny Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Putnam-Fanny Lake typically sits around 83°F at the surface in October. Summer average is about 82°F. Usually warmest in Oct (about 83°F) and coldest in Jan (about 55°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (55°F) to its warmest (83°F).
Typical surface water temperature by month, from 12 field readings (2018–2019) via the EPA Water Quality Portal. See the full Putnam-Fanny Lake water temperature breakdown →
Lake Details
Max depth
~51 ft est.
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Florida has not published bathymetry for Putnam-Fanny Lake.
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Surface area
84 acres
HydroLAKES / HydroSHEDS
Shoreline
1.4 mi
HydroLAKES / HydroSHEDS
Elevation
89 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Stays via Stay22
Stays near Putnam-Fanny Lake
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Top-rated places to stay near Putnam-Fanny Lake
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Fishing Putnam-Fanny Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Stable5 years
Phosphorus
Worsening+0.5 µg/L/yr5 years
EPA Impairment Status
Putnam-Fanny Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4C).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit FL2732X · Official waterbody report
Nearby Lakes in Putnam County
Frequently asked questions about Putnam-Fanny Lake
Where is Putnam-Fanny Lake?
- Putnam-Fanny Lake is a lake in Putnam County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Putnam-Fanny Lake?
- Putnam-Fanny Lake in Putnam County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 11.5 ft visibility. Phosphorus: 8 µg/L.
Is Putnam-Fanny Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Putnam-Fanny Lake is listed impaired under Clean Water Act §303(d) (IR 4C) for pH / acidity. Check local advisories before you swim.
What is the water temperature of Putnam-Fanny Lake?
- Putnam-Fanny Lake typically sits around 83°F at the surface in October, from 12 EPA Water Quality Portal field readings (2018–2019). That is a typical value for the month, not a live reading.
How deep is Putnam-Fanny Lake?
- No published bathymetric survey covers Putnam-Fanny Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 51 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
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Where this data comes from
331 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX331 samples · 2020–2025
Monitoring station identifiers (3)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)