What is the water quality grade for Duv-Queensharlag Lake?

Duv-Queensharlag Lake in Duval County, Florida received a water quality grade of C (Fair). Water clarity: 5.3 ft visibility. Phosphorus: 27 µg/L.

Is Duv-Queensharlag Lake safe to swim in?

Generally safe for swimming, moderate water quality. Duv-Queensharlag Lake has an overall water quality grade of C. Always check local health department advisories before swimming.

Duv-Queensharlag Lake

Duval County, FloridaEutrophic

Duv-Queensharlag Lake is a productive, nutrient-rich eutrophic lake in Duval County, Florida. Water quality is graded C based on 2 sampling years through 2021. Compared to the 3 other monitored lakes in Duval County, Duv-Queensharlag Lake ranks #3 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2021-07-12. 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 5.3 ft. Phosphorus level: 27 µg/L. Trophic State Index: 52.

Metric	Value	Grade
Water Clarity (Secchi Depth)	5.3 ft	C
Phosphorus	27 µg/L	C
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	52	Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #3 of 4 lakes in Duval County

Cleaner Lakes Within 30 Miles

Duv-Queensharlag Lake holds Grade C. One nearby lake has a higher grade.

B
Duval-Hidden Lake
Duval County · 9.3 mi · Higher grade (C → B)

See full comparison →

Nearby Lakes in Duval 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 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

Spring Lake

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

Regulated Pollution Sources Nearby

9 EPA-permitted facilities operate within about 5 miles of Duv-Queensharlag Lake under Clean Water Act (NPDES) discharge permits, including 6 classified by the EPA as major dischargers. 4 facilities have a reported Clean Water Act violation in the past three years.

Atlantic Beach Wwtf
Atlantic Beach · 2.4 mi away · NPDES FL0038776
MajorRecent violation
Neptune Beach Wwtf
Neptune Beach · 2.5 mi away · NPDES FL0020427
MajorRecent violation
Awms Llc Mayport Naval Station Wwtf
Mayport · 4.4 mi away · NPDES FL0000922
MajorRecent violation
Atlantic Beach, City Of
Atlantic Beach · 2.4 mi away · NPDES FLS266183
Major
Neptune Beach, City Of
Neptune Beach · 2.6 mi away · NPDES FLS648019
Major
Buccaneer Wwtf
Jacksonville · 2.8 mi away · NPDES FL0023248
Major

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: 2021-07-12

Monitoring stations: 3

Where to stay near Duv-Queensharlag Lake

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