Leon-Petty Gulf Lake
Leon County, Florida25 acresView mapDirections
Florida DEP publishes the water-quality measurements for Leon-Petty Gulf Lake. Here is what has been measured.
- Eutrophic
Leon-Petty Gulf Lake in Leon County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.5 ft visibility. Phosphorus: 23.5 µg/L. Surface area: 25 acres.
Leon-Petty Gulf Lake is a 25-acre productive, nutrient-rich eutrophic lake in Leon County, Florida. Overall water quality is declining over recent sampling years. Compared to the 58 other monitored lakes in Leon County, Leon-Petty Gulf Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-02-12. 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. Check local advisories before you swim.
Whether Leon-Petty Gulf 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 Leon-Petty Gulf Lake
These are the measurements Florida DEP publishes for Leon-Petty Gulf 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 4.5 ft. Phosphorus 23.5 µg/L. TSI 53.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 23.5µg/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. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Leon-Petty Gulf Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
25 acres
No bathymetric survey has been published for Leon-Petty Gulf Lake, so its depth is not documented here.
Stays via Stay22
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Fishing Leon-Petty Gulf Lake
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Worsening+0.87 µg/L/yr6 years
Reservoir Info (USACE NID)
Leon-Petty Gulf Lake is a man-made reservoir impounded by the Petty Gulf Lake Dam (completed 1972), built primarily for recreation on the Tr-Lake Iamonia; earth-type dam, 25 ft tall and 1,440 ft long.
- Surface area
- 25 ac
- Normal storage
- 203 ac-ft
- Max storage
- 233 ac-ft
- Drainage area
- 0 sq mi
- Hazard class
- Low
- Owner
- KILLEARN LAKES PLANTATION HOME OWNERS ASSOCIATION
All listed purposes: Recreation;Fire Protection, Stock, Or Small Fish Pond.
Source: USACE National Inventory of Dams, NID ID FL00117 · Operator website · Matched by proximity (0.55 km)
Nearby Lakes in Leon County
Frequently asked questions about Leon-Petty Gulf Lake
Where is Leon-Petty Gulf Lake?
- Leon-Petty Gulf Lake is a lake in Leon County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Leon-Petty Gulf Lake?
- Leon-Petty Gulf Lake in Leon County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.5 ft visibility. Phosphorus: 23.5 µg/L. Surface area: 25 acres.
Is Leon-Petty Gulf Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Leon-Petty Gulf Lake across LakeQuality
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Where this data comes from
69 measurements from 3 monitoring stations, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX69 samples · 2020–2022
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.