Clay-Foxvalley Lake
Clay County, FloridaMesotrophic
Clay-Foxvalley Lake is a mesotrophic lake in Clay County, Florida. Water quality is graded A based on 2 sampling years through 2025. Compared to the 24 other monitored lakes in Clay County, Clay-Foxvalley Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-03-15. Grade methodology: LakeGrade methodology.
Watch Clay-Foxvalley Lake water quality
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 11.5 ft. Phosphorus level: 14 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.5 ft | B |
| Phosphorus | 14 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Location
County Ranking
Ranked #7 of 25 lakes in Clay County
Nearby Lakes in Clay County
More Florida Lake Rankings
Other Grade A Lakes in Florida
Highlands County · Clarity: 16 ft
Walton County · Clarity: 9 ft
Highlands County · Clarity: 13.2 ft
Seminole County · Clarity: 11 ft
Seminole County · Clarity: 13 ft
Orange County · Clarity: 11.5 ft
Mesotrophic Lakes in Florida
Regulated Pollution Sources Nearby
4 EPA-permitted facilities operate within about 5 miles of Clay-Foxvalley Lake under Clean Water Act (NPDES) discharge permits, including 4 classified by the EPA as major dischargers. 4 facilities have a reported Clean Water Act violation in the past three years.
- Miller Street WwtfOrange Park · 2 mi away · NPDES FL0025151MajorRecent violation
- Orange Park WwtfOrange Park · 2.3 mi away · NPDES FL0023922MajorRecent violation
- Spencer'S Crossing WwtfOrange Park · 4.2 mi away · NPDES FL0173371MajorRecent violation
- Southwest District WwtfJacksonville · 5 mi away · NPDES FL0026468MajorRecent 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: 2025-03-15
Monitoring stations: 2
Where to stay near Clay-Foxvalley Lake
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