Marion-Charles Lake
Marion County, FloridaHypereutrophic
Marion-Charles Lake is a highly nutrient-loaded hypereutrophic lake in Marion County, Florida. Water quality is graded D based on 2 sampling years through 2025. Compared to the 41 other monitored lakes in Marion County, Marion-Charles Lake ranks #38 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-03-27. Grade methodology: LakeGrade methodology.
Watch Marion-Charles Lake water quality
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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: 68 µg/L. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1 ft | F |
| Phosphorus | 68 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #38 of 42 lakes in Marion County
Cleaner Lakes Within 30 Miles
Marion-Charles Lake holds Grade D. 4 nearby lakes hold higher grades.
- AMarion-Mill Dam LakeMarion County · 5.4 mi · Two grade letters higher (D → A)
- BMarion-Halfmoon LakeMarion County · 7 mi · Two grade letters higher (D → B)
- CMarion-Lou LakeMarion County · 3.2 mi · Higher grade (D → C)
- DLake Eaton CenterMarion County · 3.1 mi · Higher overall water quality score
Nearby Lakes in Marion County
More Florida Lake Rankings
Other Grade D Lakes in Florida
Hypereutrophic 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: 2025-03-27
Monitoring stations: 3
Where to stay near Marion-Charles Lake
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