Ftt Lake
Indian River County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Ftt Lake. Here is what has been measured.
- Eutrophic
Ftt Lake in Indian River County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 44.9 µg/L.
Ftt Lake is a productive, nutrient-rich eutrophic lake in Indian River County, Florida. Water clarity is declining over recent sampling years. Compared to the 8 other monitored lakes in Indian River County, Ftt Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-09-26. Methodology: how these readings are compared.
Swimming conditions
Readings onlyModerate 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. Check local advisories before you swim.
Whether Ftt 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 Ftt Lake
These are the measurements Florida DEP publishes for Ftt 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 2.3 ft of visibility. Phosphorus 44.9 µg/L. TSI 62.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 44.9µg/L | Fair 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. | 62 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Ftt Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Ftt Lake typically sits around 77°F at the surface in October. Summer average is about 85°F. Usually warmest in Aug (about 86°F) and coldest in Jan (about 59°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (59°F) to its warmest (86°F).
Typical surface water temperature by month, from 130 field readings (2010–2022) via the EPA Water Quality Portal. See the full Ftt Lake water temperature breakdown →
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Stays near Ftt Lake
Compare lakeside cabins, hotels, and vacation rentals near Ftt Lake in Indian River 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.
Top-rated places to stay near Ftt Lake
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Fishing Ftt Lake
Water quality readings over time
3 seasons of samples on record (2020–2022). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening3 years
Phosphorus
Improving-4.85 µg/L/yr3 years
Nearby Lakes in Indian River County
Frequently asked questions about Ftt Lake
Where is Ftt Lake?
- Ftt Lake is a lake in Indian River County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Ftt Lake?
- Ftt Lake in Indian River County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 44.9 µg/L.
Is Ftt Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Ftt Lake?
- Ftt Lake typically sits around 77°F at the surface in October, from 130 EPA Water Quality Portal field readings (2010–2022). That is a typical value for the month, not a live reading.
Explore Ftt Lake across LakeQuality
More lakes in Florida
Other Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
90 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- St. Johns River Water Management District
21FLSJWM_WQX90 samples · 2020–2022
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.