D

Harrisnwsh Lake

Lake County, FloridaEutrophic

Harrisnwsh Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water quality is graded D based on 2 sampling years through 2023. Compared to the 316 other monitored lakes in Lake County, Harrisnwsh Lake ranks #300 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2023-12-26. 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 2.6 ft of visibility. Phosphorus level: 67.3 µg/L. Trophic State Index: 64.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.6 ft	F
Phosphorus	67.3 µg/L	D
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	64	Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #300 of 317 lakes in Lake County

Cleaner Lakes Within 30 Miles

Harrisnwsh Lake holds Grade D. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Lake County

Herlong Park Lake

Harrislkwsh Lake

More Florida Lake Rankings

Cleanest lakes in Florida

Top 25 by overall water quality score

Best swimming lakes in Florida

Grade A/B + low algae filter

Family fishing lakes in Florida

Panfish-rich, public access

All Florida lakes

Full state directory

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

632 sq mi

Surface area

17,873 acres

Mean depth (est.)

25.3 ft

Shoreline

39.9 mi

Elevation

59 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: 2023-12-26

Monitoring stations: 1

Where to stay near Harrisnwsh Lake

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