Gatlin Lake
Orange County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Gatlin Lake. Here is what has been measured.
- Mesotrophic
Gatlin Lake in Orange County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 7.5 ft visibility. Phosphorus: 7 µg/L.
Gatlin Lake is a mesotrophic lake in Orange County, Florida. Water clarity is improving over recent sampling years. Compared to the 319 other monitored lakes in Orange County, Gatlin Lake ranks #87 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-26. 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 Gatlin 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 Gatlin Lake
These are the measurements Florida DEP publishes for Gatlin Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7.5 ft. Phosphorus 7 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 7µg/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. | 40 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Fishing Gatlin Lake
Water Quality Trend: Stable
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Worsening+0.4 µg/L/yr5 years
Nearby Lakes in Orange County
Frequently asked questions about Gatlin Lake
Where is Gatlin Lake?
- Gatlin Lake is a lake in Orange County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Gatlin Lake?
- Gatlin Lake in Orange County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 7.5 ft visibility. Phosphorus: 7 µg/L.
Is Gatlin Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Gatlin Lake across LakeQuality
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Mesotrophic Lakes in Florida
Where this data comes from
69 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples63 samples · 2020–2025
- Submitting organization not recorded for these samples6 samples · 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.