Lake Stanley
Lake Stanley in Walton County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.6 ft visibility. Phosphorus: 7 µg/L.
- Clarity
- 6.6 ft
- Typical in August
- 82°F
- Trend
- → Stable
Next lake in Walton County
Swipe left or right on this bar to open the next or previous lake.
Why Lake Stanley 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 Lake Stanley, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
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.
Lake Stanley is a lake in Walton County, Florida. Water clarity is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-06-01. Grade methodology: LakeQuality methodology.
Watch Lake Stanley water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedBacteria A
Based on E. coli testing, Lake Stanley never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 7 samples across 2 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Water quality measurements for Lake Stanley
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 6.6 ft. Phosphorus level: 7 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.6 ft | Not graded |
| Phosphorus | 7 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Stanley
Compare lakeside cabins, hotels, and vacation rentals near Lake Stanley in Walton 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 Lake Stanley
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Lake Stanley typically sits around 82°F at the surface in August. Summer average is about 81°F. Usually warmest in Sep (about 83°F) and coldest in Feb (about 58°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 22 field readings (2017–2021) via the EPA Water Quality Portal. See the full Lake Stanley water temperature breakdown →
Fishing Lake Stanley
Water Quality Trend: → Stable
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.3 m/yr | 2 |
| Phosphorus | ↑ Improving | -1 µg/L/yr | 2 |
Nearby Lakes in Walton County
Frequently asked questions about Lake Stanley
Where is Lake Stanley?
- Lake Stanley is a lake in Walton 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 Lake Stanley?
- Lake Stanley in Walton County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.6 ft visibility. Phosphorus: 7 µg/L.
Is Lake Stanley safe to swim in?
- Based on E. coli testing, Lake Stanley never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 7 samples across 2 seasons. That works out to a bacteria swim-safety grade of A — a historical summary of past testing, not a current reading. Lake Stanley is not rated for water quality — its monitoring record does not meet the evidence bar. Bacteria levels can spike quickly after heavy rain, so always check Florida's current beach and health-department advisories before you swim.
What is the water temperature of Lake Stanley?
- Lake Stanley typically sits around 82°F at the surface in August, from 22 EPA Water Quality Portal field readings (2017–2021). That is a typical value for the month, not a live reading.
Explore Lake Stanley across LakeQuality
More Florida Lake Rankings
Other Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
2 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples2 samples · 2021
Monitoring station identifiers (1)
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.