C

Dias Lake

Volusia County, FloridaEutrophic

Dias Lake is a productive, nutrient-rich eutrophic lake in Volusia County, Florida. Water quality is graded C based on 2 sampling years through 2025. Compared to the 76 other monitored lakes in Volusia County, Dias Lake ranks #29 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-02-11. Grade methodology: LakeGrade methodology.

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Very murky, less than 3.3 ft of visibility. Phosphorus level: 31.4 µg/L. Trophic State Index: 57.

Metric	Value	Grade
Water Clarity (Secchi Depth)	3.3 ft	D
Phosphorus	31.4 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 #29 of 77 lakes in Volusia County

Cleaner Lakes Within 30 Miles

Dias Lake holds Grade C. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Volusia County

Lake Winona @ Ne of Center of Lake

Lake Winona @ Center of Lake

Spring Garden Lake

Volusia-Mamie Lake

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

All Florida lakes

Full state directory

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

Seminole-Spring Lake

Seminole County · Clarity: 3 ft

Eutrophic Lakes in Florida

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

Lake Size & Watershed

Watershed (drainage) area

5 sq mi

Surface area

647 acres

Mean depth (est.)

7.5 ft

Shoreline

5 mi

Elevation

56 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: 2025-02-11

Monitoring stations: 1

Where to stay near Dias Lake

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