Thomas Lake
Polk County, FloridaEutrophic
Thomas Lake is a productive, nutrient-rich eutrophic lake in Polk County, Florida. Water quality is graded D based on 2 sampling years through 2021. Compared to the 360 other monitored lakes in Polk County, Thomas Lake ranks #271 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2021-02-22. 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 1.3 ft of visibility. Phosphorus level: 61 µg/L. Trophic State Index: 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 ft | F |
| Phosphorus | 61 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #271 of 361 lakes in Polk County
Cleaner Lakes Within 30 Miles
Thomas Lake holds Grade D. 3 nearby lakes hold higher grades.
- CPolk-Dinner LakePolk County · 1.2 mi · Higher grade (D → C)
- CLake Deer Western ShorePolk County · 1.4 mi · Higher grade (D → C)
- DLake DeerPolk County · 1.5 mi · Higher overall water quality score
Nearby Lakes in Polk 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: 2021-02-22
Monitoring stations: 1
Where to stay near Thomas Lake
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