Clay-Foxvalley Lake
Clay-Foxvalley Lake in Clay County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar.
- Trend
- ↑ Improving
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Why Clay-Foxvalley Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Clay-Foxvalley Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by FDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Clay-Foxvalley Lake is a lake in Clay County, Florida. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-15. Grade methodology: LakeQuality methodology.
Watch Clay-Foxvalley Lake water quality
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Clay-Foxvalley Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Where to stay near Clay-Foxvalley Lake
Compare lakeside cabins, hotels, and vacation rentals near Clay-Foxvalley Lake in Clay County, Florida — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Clay-Foxvalley Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Fishing Clay-Foxvalley Lake
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.104 m/yr | 3 |
| Phosphorus | ↑ Improving | -2.64 µg/L/yr | 3 |
EPA Impairment Status
Clay-Foxvalley Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit FL2372 · Official waterbody report · Matched by proximity (2.08 km)
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.
Graded lakes near Clay-Foxvalley Lake
Clay-Foxvalley Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Clay County
Frequently asked questions about Clay-Foxvalley Lake
Where is Clay-Foxvalley Lake?
- Clay-Foxvalley Lake is a lake in Clay County, Florida. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Clay-Foxvalley Lake?
- Clay-Foxvalley Lake in Clay County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar.
Is Clay-Foxvalley Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Clay-Foxvalley Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Clay-Foxvalley Lake across LakeQuality
Planning a trip around Castillo de San Marcos?
Clay-Foxvalley Lake is about 31 miles from Castillo de San Marcos National Monument. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Castillo de San Marcos →More Florida Lake Rankings
Other Lakes in Florida
Where this data comes from
10 measurements from 2 monitoring stations, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX10 samples · 2024–2025
Monitoring station identifiers (2)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)