What is the water quality grade for Lake Henry?

Lake Henry in Polk County, Florida received a water quality grade of F (Very Poor). Water clarity: 1.3 ft visibility. Phosphorus: 119.5 µg/L.

Is Lake Henry safe to swim in?

Avoid swimming, very poor water quality, potential algae toxins. Lake Henry has an overall water quality grade of F. Always check local health department advisories before swimming.

Lake Henry

Polk County, FloridaHypereutrophic

Lake Henry is a highly nutrient-loaded hypereutrophic lake in Polk County, Florida. Water quality is graded F based on 2 sampling years through 2022. Compared to the 360 other monitored lakes in Polk County, Lake Henry ranks #340 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2022-11-09. Grade methodology: LakeGrade methodology.

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1.3 ft of visibility. Phosphorus level: 119.5 µg/L. Trophic State Index: 73.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.3 ft	F
Phosphorus	119.5 µg/L	F
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	73	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Location

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County Ranking

Ranked #340 of 361 lakes in Polk County

Cleaner Lakes Within 30 Miles

Lake Henry holds Grade F. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Polk County

More Florida Lake Rankings

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Top 25 by overall water quality score

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Grade A/B + low algae filter

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Panfish-rich, public access

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Other Grade F Lakes in Florida

Alachua-Wauberg Lake

Alachua County · Clarity: 2.4 ft

Lake Roberta

Hillsborough County · Clarity: 1.3 ft

Volusia Lake George @ N of Center

Volusia County · Clarity: 2 ft

Lwc Lake

Brevard County · Clarity: 1.6 ft

Highlands-Wolf Lake

Highlands County · Clarity: 1 ft

Febin Lake

Glades County · Clarity: 1 ft

Hypereutrophic Lakes in Florida

Alicetst Lake Lake Roberta Megginnis Arm Off Crowder Landing Lake Highlands-Josephine West Lake

Lake Size & Watershed

Watershed (drainage) area

4 sq mi

Surface area

773 acres

Mean depth (est.)

11.8 ft

Shoreline

5.1 mi

Elevation

118 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: 2022-11-09

Monitoring stations: 1

Where to stay near Lake Henry

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