Lt Banana Lake
Polk County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Lt Banana Lake. Here is what has been measured.
- Hypereutrophic
- Impaired · Algal growth
- Limited data
Lt Banana Lake in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 110 µg/L.
Lt Banana Lake is a highly nutrient-loaded hypereutrophic lake in Polk County, Florida. Overall water quality is improving over recent sampling years. Compared to the 176 other monitored lakes in Polk County, Lt Banana Lake ranks #166 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-10-16. Methodology: how these readings are compared.
Swimming conditions
Readings onlyRecreation use not supported
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. Lt Banana Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Lt Banana 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 Lt Banana Lake
These are the measurements Florida DEP publishes for Lt Banana Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 1.6 ft of visibility. Phosphorus 110 µg/L. TSI 71.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 110µg/L | Poor 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. | 71 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Lt Banana Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lt Banana Lake typically sits around 79°F at the surface in October. Summer average is about 86°F. Usually warmest in Jul (about 86°F) and coldest in Jan (about 62°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (62°F) to its warmest (86°F).
Typical surface water temperature by month, from 41 field readings (2021–2023) via the EPA Water Quality Portal. See the full Lt Banana Lake water temperature breakdown →
Stays via Stay22
Stays near Lt Banana Lake
Compare lakeside cabins, hotels, and vacation rentals near Lt Banana 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Lt Banana Lake are listed below.
Top-rated places to stay near Lt Banana Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Planning a whole trip? See where to stay at Florida’s top lakes →
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Fishing Lt Banana Lake
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Stable-0.64 µg/L/yr6 years
EPA Impairment Status
Lt Banana 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, Recreation.
Source: EPA ATTAINS assessment unit FL1549B2 · Official waterbody report
Nearby Lakes in Polk County
Frequently asked questions about Lt Banana Lake
Where is Lt Banana Lake?
- Lt Banana 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 Lt Banana Lake?
- Lt Banana Lake in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 110 µg/L.
Is Lt Banana Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lt Banana Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
What is the water temperature of Lt Banana Lake?
- Lt Banana Lake typically sits around 79°F at the surface in October, from 41 EPA Water Quality Portal field readings (2021–2023). That is a typical value for the month, not a live reading.
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Where this data comes from
27 measurements from 1 monitoring station, 2021–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples27 samples · 2021–2023
Monitoring station identifiers (1)
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