Lake Tom John
Leon County, FloridaEutrophic
Lake Tom John is a productive, nutrient-rich eutrophic lake in Leon County, Florida. Water quality is graded D based on 2 sampling years through 2025. Compared to the 126 other monitored lakes in Leon County, Lake Tom John ranks #100 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-06-25. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 1.6 ft of visibility. Phosphorus level: 25 µg/L. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | F |
| Phosphorus | 25 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #100 of 127 lakes in Leon County
Cleaner Lakes Within 30 Miles
Lake Tom John holds Grade D. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Leon County
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-06-25
Monitoring stations: 2
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