Alligator Creek Lake
Pinellas County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Alligator Creek Lake. Here is what has been measured.
- Hypereutrophic
Alligator Creek Lake in Pinellas County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 155 µg/L.
Alligator Creek Lake is a highly nutrient-loaded hypereutrophic lake in Pinellas County, Florida. Overall water quality is declining over recent sampling years. Compared to the 33 other monitored lakes in Pinellas County, Alligator Creek Lake ranks #32 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-01-29. Methodology: how these readings are compared.
Swimming conditions
Readings onlyBacteria tested: exceedances
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, Alligator Creek Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 12.5% of 56 samples across 8 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 Alligator Creek 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 Creek Lake
These are the measurements Florida DEP publishes for Alligator Creek Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 155 µg/L. TSI 77.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 155µg/L | Poor 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. | 77 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Alligator Creek Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Alligator Creek Lake typically sits around 78°F at the surface in October. Summer average is about 85°F. Usually warmest in Aug (about 87°F) and coldest in Jan (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 133 field readings (2010–2025) via the EPA Water Quality Portal. See the full Alligator Creek Lake water temperature breakdown →
Stays via Stay22
Stays near Alligator Creek Lake
Compare lakeside cabins, hotels, and vacation rentals near Alligator Creek Lake in Pinellas 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Alligator Creek Lake are listed below.
Top-rated places to stay near Alligator Creek Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Florida’s top lakes →
Follow Alligator Creek Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Alligator Creek Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening5 years
Phosphorus
Worsening+13 µg/L/yr5 years
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Alligator Creek Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Clearwater City Of East AwwtpClearwater · 1.1 mi away · NPDES FL0021865MajorRecent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Pinellas County
Frequently asked questions about Alligator Creek Lake
Where is Alligator Creek Lake?
- Alligator Creek Lake is a lake in Pinellas 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 Creek Lake?
- Alligator Creek Lake in Pinellas County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 155 µg/L.
Is Alligator Creek Lake safe to swim in?
- Based on E. coli testing, Alligator Creek Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 12.5% of 56 samples across 8 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 Alligator Creek 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.
What is the water temperature of Alligator Creek Lake?
- Alligator Creek Lake typically sits around 78°F at the surface in October, from 133 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Alligator Creek Lake across LakeQuality
More lakes in Florida
Other Lakes in Florida
Hypereutrophic Lakes in Florida
Where this data comes from
40 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 samples40 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.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)