C

Louisa Ne Sh Lake

Lake County, FloridaEutrophic

Louisa Ne Sh Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water quality is graded C based on 2 sampling years through 2025. Compared to the 316 other monitored lakes in Lake County, Louisa Ne Sh Lake ranks #171 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-08-25. Grade methodology: LakeGrade methodology.

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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: 36.8 µg/L. Trophic State Index: 57.

Metric	Value	Grade
Water Clarity (Secchi Depth)	3.8 ft	D
Phosphorus	36.8 µg/L	C
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	57	Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #171 of 317 lakes in Lake County

Cleaner Lakes Within 30 Miles

Louisa Ne Sh Lake holds Grade C. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Lake County

Louisa @Crookedrv Lake

Crookedrvbr Lake

Lake Felter @ Center

More Florida Lake Rankings

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Other Grade C Lakes in Florida

Lake Lancaster West

Orange County · Clarity: 3.5 ft

Eastern Lake Outlet

Walton County · Clarity: 4.2 ft

Seminole-Secret Lake

Seminole County · Clarity: 4.5 ft

Seminole County · Clarity: 2.9 ft

Polk-Fannie Lake

Polk County · Clarity: 3.5 ft

Volusia-North Talmadge Lake

Volusia County · Clarity: 4.5 ft

Eutrophic Lakes in Florida

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

Lake Size & Watershed

Watershed (drainage) area

42 sq mi

Surface area

3,069 acres

Mean depth (est.)

23.3 ft

Shoreline

8.4 mi

Elevation

89 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: 2025-08-25

Monitoring stations: 1

Where to stay near Louisa Ne Sh Lake

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