Ftt Lake
Ftt Lake in Indian River County, Florida has a water quality grade of C (Fair). Water clarity: 2.3 ft visibility. Phosphorus: 44.9 µg/L.
- Clarity
- 2.3 ft
- Typical in August
- 86°F
- Type
- Eutrophic
- Trend
- → Stable
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Ftt Lake is a productive, nutrient-rich eutrophic lake in Indian River County, Florida. Water quality is graded C based on 1 sampling years through 2022. 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. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyModerate
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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Very murky, less than 2.3 ft of visibility. Phosphorus level: 44.9 µg/L. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Not graded |
| Phosphorus | 44.9 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay 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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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Ftt Lake typically sits around 86°F at the surface in August. 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.
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 →
Fishing Ftt Lake
Water Quality Trend: → Stable
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.05 m/yr | 3 |
| Phosphorus | ↑ Improving | -4.85 µg/L/yr | 3 |
County Ranking
Ranked #5 of 9 lakes in Indian River County
Nearby Lakes With Higher Grades
Ftt Lake holds Grade C. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
See full comparison →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. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Ftt Lake?
- Ftt Lake in Indian River County, Florida has a water quality grade of C (Fair). Water clarity: 2.3 ft visibility. Phosphorus: 44.9 µg/L.
Is Ftt Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Ftt Lake has a water quality grade of C (Fair). Always check local health department advisories before swimming.
What is the water temperature of Ftt Lake?
- Ftt Lake typically sits around 86°F at the surface in August, 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 Florida Lake Rankings
Other Grade C 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)
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.