Doctor'S Lake @ Mill Cove
Clay County, FloridaEutrophic
Doctor'S Lake @ Mill Cove is a productive, nutrient-rich eutrophic lake in Clay County, Florida. Water quality is graded D based on 2 sampling years through 2024. Compared to the 24 other monitored lakes in Clay County, Doctor'S Lake @ Mill Cove ranks #18 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2024-09-17. Grade methodology: LakeGrade methodology.
Watch Doctor'S Lake @ Mill Cove water quality
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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 2.1 ft of visibility. Phosphorus level: 86.5 µg/L. Trophic State Index: 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.1 ft | F |
| Phosphorus | 86.5 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 67 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #18 of 25 lakes in Clay County
Nearby Lakes in Clay County
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Doctor'S Lake @ Mill Cove under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Fleming Island Regional WwtfOrange Park · 2.1 mi away · NPDES FL0043834MajorRecent 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)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-17
Monitoring stations: 1
Where to stay near Doctor'S Lake @ Mill Cove
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