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C

Seminole-Concord Lake

Seminole County, FloridaEutrophic

Seminole-Concord Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded C based on 2 sampling years through 2025. Compared to the 167 other monitored lakes in Seminole County, Seminole-Concord Lake ranks #66 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-04-15. 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 ft of visibility. Phosphorus level: 24 µg/L. Trophic State Index: 56.

MetricValueGrade
Water Clarity (Secchi Depth)3 ftD
Phosphorus24 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)56Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #66 of 168 lakes in Seminole County

Cleaner Lakes Within 30 Miles

Seminole-Concord Lake holds Grade C. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Seminole County

C
Lake Concord
Seminole County
B
Quail Pond
Seminole County
B
Seminole-Quail Pond
Seminole County
B
Lake Ellen
Seminole County
C
Secretlk Lake
Seminole County
B
Lake Griffin
Seminole 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 C Lakes in Florida

Lake Lancaster West

Orange County · Clarity: 3.5 ft

Eastern Lake Outlet

Walton County · Clarity: 4.2 ft

Polk-Fannie Lake

Polk County · Clarity: 3.5 ft

Volusia-North Talmadge Lake

Volusia County · Clarity: 4.5 ft

Oyster Lake Middle

Walton County · Clarity: 3 ft

Alachua-Elizabeth Lake

Alachua County · Clarity: 3 ft

Eutrophic Lakes in Florida

Lake Lancaster WestFlagler-Emerald LakeEastern Lake OutletFtt Lake

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-04-15

Monitoring stations: 3

Where to stay near Seminole-Concord Lake

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