Polk-Fauna Lake
Polk-Fauna Lake in Polk County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 3 ft visibility. Phosphorus: 142 µg/L.
- Clarity
- 3 ft
- Type
- Eutrophic
- Trend
- ↓ Declining
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Polk-Fauna Lake →
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Polk-Fauna Lake is a productive, nutrient-rich eutrophic lake in Polk County, Florida. Water quality is graded D based on 1 sampling years through 2022. Overall water quality is declining over recent sampling years. Compared to the 176 other monitored lakes in Polk County, Polk-Fauna Lake ranks #126 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-09-13. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyElevated nutrients
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.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Very murky, less than 3 ft of visibility. Phosphorus level: 142 µg/L. Trophic State Index: 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | Not graded |
| Phosphorus | 142 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Polk-Fauna Lake
Compare lakeside cabins, hotels, and vacation rentals near Polk-Fauna Lake in Polk County, Florida — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Polk-Fauna Lake are listed below.
Top-rated places to stay near Polk-Fauna Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Fishing Polk-Fauna Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.04 m/yr | 5 |
| Phosphorus | ↓ Declining | +14.65 µg/L/yr | 5 |
EPA Impairment Status
Polk-Fauna Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit FL1623X · Official waterbody report · Matched by proximity (0.44 km)
Regulated Pollution Sources Nearby
7 EPA-permitted facilities operate within about 5 miles of Polk-Fauna Lake under Clean Water Act (NPDES) discharge permits, including 7 classified by the EPA as major dischargers.
- Fdot District 1 - SarasotaBartow · 2 mi away · NPDES FLS266167Major
- Fdot District 1 - LeeBartow · 2 mi away · NPDES FLS266965Major
- Polk Co & Co App - MS4Bartow · 2.2 mi away · NPDES FLS000015Major
- Fdot District 1 - PolkBartow · 2.2 mi away · NPDES FLS266779Major
- Fdot District 1 - ManateeBartow · 2.2 mi away · NPDES FLS267368Major
- U S Agri-Chemicals Corporation - Bartow Chemical PlantBartow · 2.3 mi away · NPDES FL0001961Major
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
County Ranking
Ranked #126 of 177 lakes in Polk County
Nearby Lakes in Polk County
Frequently asked questions about Polk-Fauna Lake
Where is Polk-Fauna Lake?
- Polk-Fauna Lake is a lake in Polk County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Polk-Fauna Lake?
- Polk-Fauna Lake in Polk County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 3 ft visibility. Phosphorus: 142 µg/L.
Is Polk-Fauna Lake safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Polk-Fauna Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
Explore Polk-Fauna Lake across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
153 measurements from 3 monitoring stations, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX153 samples · 2020–2022
Monitoring station identifiers (3)
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)