Tresca Lake
Walton County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Tresca Lake. Here is what has been measured.
- Eutrophic
Tresca Lake in Walton County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 3.2 ft visibility. Phosphorus: 13 µg/L.
Tresca Lake is a productive, nutrient-rich eutrophic lake in Walton County, Florida. Overall water quality is improving over recent sampling years. Compared to the 83 other monitored lakes in Walton County, Tresca Lake ranks #41 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-02-06. Methodology: how these readings are compared.
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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. Check local advisories before you swim.
Whether Tresca 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 Tresca Lake
These are the measurements Florida DEP publishes for Tresca 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 3.2 ft of visibility. Phosphorus 13 µg/L. TSI 51.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 13µg/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. | 51 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Tresca Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Tresca Lake typically sits around 73°F at the surface in October. Summer average is about 85°F. Usually warmest in Jul (about 86°F) and coldest in Jan (about 57°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (57°F) to its warmest (86°F).
Typical surface water temperature by month, from 400 field readings (2010–2025) via the EPA Water Quality Portal. See the full Tresca Lake water temperature breakdown →
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Stays near Tresca Lake
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Top-rated places to stay near Tresca Lake
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Fishing Tresca Lake
Water Quality Trend: Improving
Based on 5 years of monitoring (2020–2024).
Water clarity
Stable5 years
Phosphorus
Improving-1.4 µg/L/yr5 years
Nearby Lakes in Walton County
Frequently asked questions about Tresca Lake
Where is Tresca Lake?
- Tresca Lake is a lake in Walton County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Tresca Lake?
- Tresca Lake in Walton County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 3.2 ft visibility. Phosphorus: 13 µg/L.
Is Tresca 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 Tresca Lake?
- Tresca Lake typically sits around 73°F at the surface in October, from 400 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Tresca Lake across LakeQuality
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Where this data comes from
121 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- CHOCTAWHATCHEE BASIN ALLIANCE
21FLCBA_WQX121 samples · 2020–2025
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.