Lake Mare Prairie
Orange County, FloridaEutrophic
Lake Mare Prairie is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded D based on 2 sampling years through 2025. Compared to the 531 other monitored lakes in Orange County, Lake Mare Prairie ranks #411 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-03-25. 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 2.5 ft of visibility. Phosphorus level: 40.5 µg/L. Trophic State Index: 61.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.5 ft | F |
| Phosphorus | 40.5 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #411 of 532 lakes in Orange County
Cleaner Lakes Within 30 Miles
Lake Mare Prairie holds Grade D. 4 nearby lakes hold higher grades.
- AOrange-Conway South LakeOrange County · 1.4 mi · Two grade letters higher (D → A)
- AOrange-Conway North LakeOrange County · 1.8 mi · Two grade letters higher (D → A)
- AConway S LakeOrange County · 1.5 mi · Two grade letters higher (D → A)
- BLake ConwayOrange County · 1.5 mi · Two grade letters higher (D → B)
Nearby Lakes in Orange County
More Florida Lake Rankings
Other Grade D Lakes in Florida
Flagler County · Clarity: 1.8 ft
Indian River County · Clarity: 2.3 ft
Putnam County · Clarity: 2 ft
Alachua County · Clarity: 3.3 ft
Sarasota County · Clarity: 3.8 ft
Leon County · Clarity: 1 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: 2025-03-25
Monitoring stations: 1
Where to stay near Lake Mare Prairie
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