Leon-Tom John Lake
Leon-Tom John Lake in Leon County, Florida has a water quality grade of B (Good). Water clarity: 5 ft visibility. Phosphorus: 40 µg/L.
- Clarity
- 5 ft
- Type
- Eutrophic
- Trend
- → Stable
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Leon-Tom John Lake is a productive, nutrient-rich eutrophic lake in Leon County, Florida. Water quality is graded B based on 1 sampling years through 2022. Water clarity is declining over recent sampling years. Compared to the 58 other monitored lakes in Leon County, Leon-Tom John Lake ranks #21 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-09-20. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Murky, only visible to about 5 ft. Phosphorus level: 40 µg/L. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | Not graded |
| Phosphorus | 40 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Leon-Tom John Lake
Compare lakeside cabins, hotels, and vacation rentals near Leon-Tom John Lake in Leon 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.
Top-rated places to stay near Leon-Tom John Lake
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Fishing Leon-Tom John Lake
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.158 m/yr | 3 |
| Phosphorus | ↑ Improving | -4.08 µg/L/yr | 6 |
EPA Impairment Status
Leon-Tom John Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL647A · Official waterbody report · Matched by proximity (0.06 km)
County Ranking
Ranked #21 of 59 lakes in Leon County
Nearby Lakes in Leon County
Frequently asked questions about Leon-Tom John Lake
Where is Leon-Tom John Lake?
- Leon-Tom John Lake is a lake in Leon County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Leon-Tom John Lake?
- Leon-Tom John Lake in Leon County, Florida has a water quality grade of B (Good). Water clarity: 5 ft visibility. Phosphorus: 40 µg/L.
Is Leon-Tom John Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Leon-Tom John Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
Explore Leon-Tom John Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
39 measurements from 3 monitoring stations, 2021–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX39 samples · 2021–2022
Monitoring station identifiers (3)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database