Lake Holly
Hillsborough County, FloridaEutrophic
Lake Holly is a productive, nutrient-rich eutrophic lake in Hillsborough County, Florida. Water quality is graded D based on 2 sampling years through 2024. Compared to the 221 other monitored lakes in Hillsborough County, Lake Holly ranks #173 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2024-12-04. 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 3.3 ft of visibility. Phosphorus level: 170 µg/L. Trophic State Index: 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | D |
| Phosphorus | 170 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 69 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #173 of 222 lakes in Hillsborough County
Cleaner Lakes Within 30 Miles
Lake Holly holds Grade D. 5 nearby lakes hold higher grades.
- BHillsborough-Harvey LakeHillsborough County · 0.5 mi · Two grade letters higher (D → B)
- BLake VirginiaHillsborough County · 0.7 mi · Two grade letters higher (D → B)
- BHillsborough-Holly LakeHillsborough County · 0.1 mi · Two grade letters higher (D → B)
- BCamp Lake SouthPasco County · 1 mi · Two grade letters higher (D → B)
- CHillsborough-Nancy LakeHillsborough County · 0.6 mi · Higher grade (D → C)
Nearby Lakes in Hillsborough 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: 2024-12-04
Monitoring stations: 1
Where to stay near Lake Holly
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