Crescent Lake
Lake County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Crescent Lake. Here is what has been measured.
- Eutrophic
- Limited data
Crescent Lake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.3 ft visibility. Phosphorus: 40 µg/L.
Crescent Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water clarity is declining over recent sampling years. Compared to the 127 other monitored lakes in Lake County, Crescent Lake ranks #62 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-08-11. Methodology: how these readings are compared.
For a place on the water, look through cabin and lake-house rentals near Crescent Lake on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
Swimming conditions
Readings onlyBacteria tested: low
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.
Based on E. coli testing, Crescent Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 7 samples across 3 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Whether Crescent 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 Crescent Lake
These are the measurements Florida DEP publishes for Crescent Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.3 ft. Phosphorus 40 µg/L. TSI 57.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 40µg/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. | 57 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Stays near Crescent Lake
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Fishing Crescent Lake
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Improving-0.61 µg/L/yr6 years
Nearby Lakes in Lake County
Frequently asked questions about Crescent Lake
Where is Crescent Lake?
- Crescent 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 Crescent Lake?
- Crescent Lake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.3 ft visibility. Phosphorus: 40 µg/L.
Is Crescent Lake safe to swim in?
- Based on E. coli testing, Crescent Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 7 samples across 3 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Crescent Lake is safe to swim in today is a call for Florida's water agency and the county health department; check their current beach advisories before you swim.
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Where this data comes from
14 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples14 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.