D

Susan Lake

Lake County, FloridaEutrophic

Susan Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water quality is graded D based on 2 sampling years through 2025. Compared to the 316 other monitored lakes in Lake County, Susan Lake ranks #277 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-01-28. 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 2.3 ft of visibility. Phosphorus level: 37.4 µg/L. Trophic State Index: 61.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.3 ft	F
Phosphorus	37.4 µg/L	C
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	61	Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #277 of 317 lakes in Lake County

Cleaner Lakes Within 30 Miles

Susan Lake holds Grade D. 5 nearby lakes hold higher grades.

See full comparison →

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More Florida Lake Rankings

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Other Grade D Lakes in Florida

Flagler-Emerald Lake

Flagler County · Clarity: 1.8 ft

Indian River County · Clarity: 2.3 ft

Lake Orlando East

Orange County · Clarity: 2 ft

Orange County · Clarity: 3 ft

Orange County · Clarity: 2 ft

Putnam-Suggs Lake

Putnam County · Clarity: 2 ft

Eutrophic Lakes in Florida

Lake Lancaster West Flagler-Emerald Lake Eastern Lake Outlet Seminole-Secret Lake

Lake Size & Watershed

Watershed (drainage) area

44 sq mi

Surface area

67 acres

Mean depth (est.)

8.9 ft

Shoreline

1.2 mi

Elevation

108 ft

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: 2025-01-28

Monitoring stations: 1

Where to stay near Susan Lake

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