Alligator Lake
Osceola County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Alligator Lake. Here is what has been measured.
- Impaired · Mercury
- Public access
- Limited data
Alligator Lake in Osceola County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.4 ft visibility.
Alligator Lake is a lake in Osceola County, Florida. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-10-23. Methodology: how these readings are compared.
What Alligator Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Alligator Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Alligator 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 Alligator Lake
These are the measurements Florida DEP publishes for Alligator 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 4.4 ft. TSI 56.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading 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. | 56 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Alligator Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Alligator Lake typically sits around 75°F at the surface in October. Summer average is about 88°F. Usually warmest in Aug (about 88°F) and coldest in Jan (about 66°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (66°F) to its warmest (88°F).
Typical surface water temperature by month, from 22 field readings (2016–2023) via the EPA Water Quality Portal. See the full Alligator Lake water temperature breakdown →
Recreation & Access
- C-33 Access AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Alligator Lake
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Fishing Alligator Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening5 years
Phosphorus
Worsening+1.9 µg/L/yr5 years
EPA Impairment Status
Alligator Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL3176 · Official waterbody report
Nearby Lakes in Osceola County
Frequently asked questions about Alligator Lake
Where is Alligator Lake?
- Alligator 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 Alligator Lake?
- Alligator Lake in Osceola County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.4 ft visibility.
Is Alligator Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Alligator Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
What is the water temperature of Alligator Lake?
- Alligator Lake typically sits around 75°F at the surface in October, from 22 EPA Water Quality Portal field readings (2016–2023). That is a typical value for the month, not a live reading.
Are there boat ramps on Alligator Lake?
- Alligator Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include C-33 Access Area. Public access is listed as yes.
Can I fish at Alligator Lake?
- Alligator Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Florida's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
6 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples6 samples · 2023
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory