Franklinswsh Lake
Franklinswsh Lake in Lake County, Florida has a water quality grade of B (Good). Water clarity: 3.9 ft visibility. Phosphorus: 18 µg/L.
- Clarity
- 3.9 ft
- Typical in June
- 86°F
- Type
- Eutrophic
- Trend
- → Stable
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Franklinswsh Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water quality is graded B based on 1 sampling years through 2025. Water clarity is declining over recent sampling years. Compared to the 127 other monitored lakes in Lake County, Franklinswsh Lake ranks #84 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-05-29. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyBacteria A
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Based on E. coli testing, Franklinswsh Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 15 samples across 3 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 Grade: B (Good)
Murky, only visible to about 3.9 ft. Phosphorus level: 18 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 ft | Not graded |
| Phosphorus | 18 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Franklinswsh Lake
Compare lakeside cabins, hotels, and vacation rentals near Franklinswsh Lake in Lake 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 Franklinswsh Lake
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Water Temperature
Franklinswsh Lake typically sits around 86°F at the surface in June. Summer average is about 86°F. Usually warmest in Jun (about 86°F) and coldest in Jan (about 59°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 18 field readings (2023–2025) via the EPA Water Quality Portal. See the full Franklinswsh Lake water temperature breakdown →
Fishing Franklinswsh Lake
Water Quality Trend: → Stable
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.035 m/yr | 3 |
| Phosphorus | ↑ Improving | -3.67 µg/L/yr | 3 |
County Ranking
Ranked #84 of 128 lakes in Lake County
Nearby Lakes in Lake County
Frequently asked questions about Franklinswsh Lake
Where is Franklinswsh Lake?
- Franklinswsh Lake is a lake in Lake County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Franklinswsh Lake?
- Franklinswsh Lake in Lake County, Florida has a water quality grade of B (Good). Water clarity: 3.9 ft visibility. Phosphorus: 18 µg/L.
Is Franklinswsh Lake safe to swim in?
- Based on E. coli testing, Franklinswsh Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 15 samples across 3 seasons. That works out to a bacteria swim-safety grade of A — a historical summary of past testing, not a current reading. Franklinswsh Lake has a water quality grade of B (Good). 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 Franklinswsh Lake?
- Franklinswsh Lake typically sits around 86°F at the surface in June, from 18 EPA Water Quality Portal field readings (2023–2025). That is a typical value for the month, not a live reading.
Explore Franklinswsh Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
36 measurements from 1 monitoring station, 2023–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples36 samples · 2023–2025
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.