Osceola-Coon Lake
Osceola County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Osceola-Coon Lake. Here is what has been measured.
- Eutrophic
- Impaired · Impaired biota (cause unknown)
Osceola-Coon Lake in Osceola County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.5 ft visibility. Phosphorus: 31 µg/L.
Osceola-Coon Lake is a productive, nutrient-rich eutrophic lake in Osceola County, Florida. Overall water quality is declining over recent sampling years. Compared to the 30 other monitored lakes in Osceola County, Osceola-Coon Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-12. Methodology: how these readings are compared.
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. Osceola-Coon Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
Whether Osceola-Coon 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 Osceola-Coon Lake
These are the measurements Florida DEP publishes for Osceola-Coon 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 1.5 ft of visibility. Phosphorus 31 µg/L. TSI 62.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 31µg/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. | 62 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Osceola-Coon Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening5 years
Phosphorus
Worsening+3.3 µg/L/yr5 years
EPA Impairment Status
Osceola-Coon Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit FL3174D · Official waterbody report
Nearby Lakes in Osceola County
Frequently asked questions about Osceola-Coon Lake
Where is Osceola-Coon Lake?
- Osceola-Coon Lake is a lake in Osceola County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Osceola-Coon Lake?
- Osceola-Coon Lake in Osceola County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.5 ft visibility. Phosphorus: 31 µg/L.
Is Osceola-Coon Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Osceola-Coon Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
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Where this data comes from
340 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX340 samples · 2020–2025
Monitoring station identifiers (3)
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database