Polk-Fannie Lake
Polk County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Polk-Fannie Lake. Here is what has been measured.
- Eutrophic
- Impaired · Impaired biota (cause unknown)
- Public access
Polk-Fannie Lake in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 3.5 ft visibility. Phosphorus: 28 µg/L.
Polk-Fannie Lake is a productive, nutrient-rich eutrophic lake in Polk County, Florida. Water clarity is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 176 other monitored lakes in Polk County, Polk-Fannie Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-31. Methodology: how these readings are compared.
What Polk-Fannie Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
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. Polk-Fannie Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
Whether Polk-Fannie 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 Polk-Fannie Lake
These are the measurements Florida DEP publishes for Polk-Fannie Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 3.5 ft. Phosphorus 28 µg/L. TSI 56.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 28µg/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. | 56 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Polk-Fannie Lake
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
- Lake Fannie Public Boat RampPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Polk-Fannie Lake
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Fishing Polk-Fannie Lake
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Improving-2.93 µg/L/yr6 years
EPA Impairment Status
Polk-Fannie Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit FL14882 · Official waterbody report
Nearby Lakes in Polk County
Frequently asked questions about Polk-Fannie Lake
Where is Polk-Fannie Lake?
- Polk-Fannie Lake is a lake in Polk County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Polk-Fannie Lake?
- Polk-Fannie Lake in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 3.5 ft visibility. Phosphorus: 28 µg/L.
Is Polk-Fannie Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Polk-Fannie Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
Are there boat ramps on Polk-Fannie Lake?
- Polk-Fannie Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Fannie Public Boat Ramp. Public access is listed as yes.
Can I fish at Polk-Fannie Lake?
- Polk-Fannie Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Florida's fish and wildlife agency, so check its current regulations before you go.
Explore Polk-Fannie Lake across LakeQuality
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Where this data comes from
149 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_WQX149 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
Named boat-access points from the USGS National Boat Ramps inventory