Crescent Lake
Putnam County, FloridaHypereutrophic
Crescent Lake is a highly nutrient-loaded hypereutrophic lake in Putnam County, Florida. Water quality is graded F based on 2 sampling years through 2024. Compared to the 67 other monitored lakes in Putnam County, Crescent Lake ranks #67 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2024-10-14. Grade methodology: LakeGrade methodology.
Watch Crescent Lake water quality
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.6 ft of visibility. Phosphorus level: 100 µg/L. Trophic State Index: 70.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | F |
| Phosphorus | 100 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 70 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #67 of 68 lakes in Putnam County
Cleaner Lakes Within 30 Miles
Crescent Lake holds Grade F. 3 nearby lakes hold higher grades.
- BLake StellaPutnam County · 0.4 mi · Two grade letters higher (F → B)
- BLakePutnam County · 2.4 mi · Two grade letters higher (F → B)
- COmglk LakePutnam County · 2 mi · Two grade letters higher (F → C)
Nearby Lakes in Putnam County
More Florida Lake Rankings
Other Grade F Lakes in Florida
Hypereutrophic Lakes in Florida
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Crescent Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Crescent City WwtfCrescent City · 0.1 mi away · NPDES FL0021610Recent violation
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)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-10-14
Monitoring stations: 2
Where to stay near Crescent Lake
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