Sumter-Big Gant Lake
Sumter County, FloridaEutrophic
Sumter-Big Gant Lake is a productive, nutrient-rich eutrophic lake in Sumter County, Florida. Water quality is graded C based on 2 sampling years through 2025. Compared to the 19 other monitored lakes in Sumter County, Sumter-Big Gant Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-04-22. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Very murky, less than 3 ft of visibility. Phosphorus level: 56.5 µg/L. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | D |
| Phosphorus | 56.5 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #8 of 20 lakes in Sumter County
Cleaner Lakes Within 30 Miles
Sumter-Big Gant Lake holds Grade C. 3 nearby lakes hold higher grades.
- ALakeLake County · 12.2 mi · Two grade letters higher (C → A)
- BLilbluff LakeLake County · 12.1 mi · Higher grade (C → B)
- BSunset LakeLake County · 11.9 mi · Higher grade (C → B)
Nearby Lakes in Sumter County
More Florida Lake Rankings
Other Grade C Lakes in Florida
Orange County · Clarity: 3.5 ft
Walton County · Clarity: 4.2 ft
Seminole County · Clarity: 4.5 ft
Seminole County · Clarity: 2.9 ft
Polk County · Clarity: 3.5 ft
Volusia County · Clarity: 4.5 ft
Eutrophic Lakes in Florida
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-04-22
Monitoring stations: 3
Where to stay near Sumter-Big Gant Lake
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