Lake Seminole
Pinellas County, FloridaHypereutrophic
Lake Seminole is a highly nutrient-loaded hypereutrophic lake in Pinellas County, Florida. Water quality is graded D based on 2 sampling years through 2025. Compared to the 54 other monitored lakes in Pinellas County, Lake Seminole ranks #31 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-03-04. 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 ft of visibility. Phosphorus level: 75 µg/L. Trophic State Index: 72.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1 ft | F |
| Phosphorus | 75 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 72 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #31 of 55 lakes in Pinellas County
Nearby Lakes in Pinellas County
More Florida Lake Rankings
Other Grade D Lakes in Florida
Hypereutrophic Lakes in Florida
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-03-04
Monitoring stations: 76
Where to stay near Lake Seminole
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