St Lucie-Margaret Lake
St. Lucie County, FloridaEutrophic
St Lucie-Margaret Lake is a productive, nutrient-rich eutrophic lake in St. Lucie County, Florida. Water quality is graded C based on 2 sampling years through 2023. Compared to the 13 other monitored lakes in St. Lucie County, St Lucie-Margaret Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2023-04-11. Grade methodology: LakeGrade methodology.
Watch St Lucie-Margaret Lake water quality
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 3.8 ft. Phosphorus level: 22 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.8 ft | D |
| Phosphorus | 22 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #4 of 14 lakes in St. Lucie County
Cleaner Lakes Within 30 Miles
St Lucie-Margaret Lake holds Grade C. 3 nearby lakes hold higher grades.
- ASt Lucie-Savanna-Indrio LakeSt. Lucie County · 2.8 mi · Two grade letters higher (C → A)
- BSt Lucie-Jeffery LakeSt. Lucie County · 0.6 mi · Higher grade (C → B)
- BSt Lucie-Savanna LakeSt. Lucie County · 18.9 mi · Higher grade (C → B)
Nearby Lakes in St. Lucie 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
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-04-11
Monitoring stations: 3
Where to stay near St Lucie-Margaret Lake
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