Susan Lake
Lake County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Susan Lake. Here is what has been measured.
- Limited data
Susan Lake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 37.4 µg/L.
Susan Lake is a lake in Lake County, Florida. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-01-28. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Susan 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 Susan Lake
These are the measurements Florida DEP publishes for Susan 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 37.4 µg/L. TSI 61.
| 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 | 37.4µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| 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. | 61 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Susan Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Susan Lake typically sits around 75°F at the surface in October. Summer average is about 87°F. Usually warmest in Jun (about 87°F) and coldest in Feb (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 (87°F).
Typical surface water temperature by month, from 12 field readings (2011–2025) via the EPA Water Quality Portal. See the full Susan Lake water temperature breakdown →
Stays via Stay22
Stays near Susan Lake
Compare lakeside cabins, hotels, and vacation rentals near Susan Lake in Lake 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.
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Fishing Susan Lake
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Worsening+1.31 µg/L/yr6 years
Nearby Lakes in Lake County
Frequently asked questions about Susan Lake
Where is Susan Lake?
- Susan Lake is a lake in Lake County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Susan Lake?
- Susan Lake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 37.4 µg/L.
Is Susan 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 Susan Lake?
- Susan Lake typically sits around 75°F at the surface in October, from 12 EPA Water Quality Portal field readings (2011–2025). That is a typical value for the month, not a live reading.
Explore Susan Lake across LakeQuality
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Where this data comes from
6 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples6 samples · 2024–2025
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.