D

Putnam-Ross Lake

Putnam County, FloridaEutrophic

Putnam-Ross Lake is a productive, nutrient-rich eutrophic lake in Putnam County, Florida. Water quality is graded D based on 2 sampling years through 2025. Compared to the 67 other monitored lakes in Putnam County, Putnam-Ross Lake ranks #59 for water quality.

Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-03-13. 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 ft of visibility. Phosphorus level: 69 µg/L. Trophic State Index: 66.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2 ft	F
Phosphorus	69 µg/L	D
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	66	Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #59 of 68 lakes in Putnam County

Cleaner Lakes Within 30 Miles

Putnam-Ross Lake holds Grade D. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Putnam County

Putnam-Mccloud Lake

Putnam-Rosa Lake

Putnam-Anderson Cue Lake

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

Indian River County · Clarity: 2.3 ft

Lake Orlando East

Orange County · Clarity: 2 ft

Orange County · Clarity: 3 ft

Orange County · Clarity: 2 ft

Alachua County · Clarity: 3.3 ft

Eutrophic Lakes in Florida

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

Lake Size & Watershed

Watershed (drainage) area

1 sq mi

Surface area

79 acres

Mean depth (est.)

10.2 ft

Shoreline

1.3 mi

Elevation

112 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: 2025-03-13

Monitoring stations: 3

Where to stay near Putnam-Ross Lake

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