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D

St Lucie-de Witt Lake

St. Lucie County, FloridaEutrophic

St Lucie-de Witt Lake is a productive, nutrient-rich eutrophic lake in St. Lucie County, Florida. Water quality is graded D based on 2 sampling years through 2023. Compared to the 13 other monitored lakes in St. Lucie County, St Lucie-de Witt Lake ranks #11 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2023-04-14. 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 2.7 ft of visibility. Phosphorus level: 46 µg/L. Trophic State Index: 61.

MetricValueGrade
Water Clarity (Secchi Depth)2.7 ftF
Phosphorus46 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)61Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #11 of 14 lakes in St. Lucie County

Cleaner Lakes Within 30 Miles

St Lucie-de Witt Lake holds Grade D. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in St. Lucie County

C
St Lucie-Margaret Lake
St. Lucie County
B
St Lucie-Jeffery Lake
St. Lucie County
C
St Lucie-Phillip Lake
St. Lucie County
A
St Lucie-Savanna-Indrio Lake
St. Lucie County
C
Lmr Lake
Indian River County
B
St Lucie-Savanna Lake
St. Lucie County

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

Ftt Lake

Indian River County · Clarity: 2.3 ft

Lake Orlando East

Orange County · Clarity: 2 ft

Lake Rowena

Orange County · Clarity: 3 ft

Lake G

Orange County · Clarity: 2 ft

Putnam-Suggs Lake

Putnam County · Clarity: 2 ft

Eutrophic Lakes in Florida

Lake Lancaster WestFlagler-Emerald LakeEastern Lake OutletSeminole-Secret Lake

Regulated Pollution Sources Nearby

3 EPA-permitted facilities operate within about 5 miles of St Lucie-de Witt Lake under Clean Water Act (NPDES) discharge permits. 2 facilities have a reported Clean Water Act violation in the past three years.

  • Ircud - South County Demin Concentrate Wtp
    Vero Beach · 2.6 mi away · NPDES FL0037940
    Recent violation
  • Spanish Lakes Country Club Village Ro Wtp Discharge Facility
    Fort Pierce · 4 mi away · NPDES FL0345547
    Recent violation
  • Spanish Lakes Fairways - Ro Wtp Discharge Facility
    Fort Pierce · 4 mi away · NPDES FL0140023

Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.

Data Sources

Water quality data from the EPA Water Quality Portal

Regulated discharger data from EPA ECHO (ICIS-NPDES)

Grading methodology based on Metropolitan Council standards

Most recent sample: 2023-04-14

Monitoring stations: 3

Where to stay near St Lucie-de Witt Lake

Compare lakeside cabins, hotels, and vacation rentals near St Lucie-de Witt Lake in St. Lucie County, Florida — live availability and prices for your trip.

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