Hancock Lake
Hancock Lake in Lake County, Florida has a water quality grade of B (Good). Water clarity: 5.7 ft visibility. Phosphorus: 30.5 µg/L.
- Clarity
- 5.7 ft
- Max depth
- ~54 ft est.
- Type
- Eutrophic
- Trend
- → Stable
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Hancock Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida with an estimated average depth of about 54 feet. 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, Hancock Lake ranks #50 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-07-28. Grade methodology: LakeQuality methodology.
Watch Hancock Lake water quality
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Swimming Safety
Grade onlyLimited data
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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Murky, only visible to about 5.7 ft. Phosphorus level: 30.5 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.7 ft | Not graded |
| Phosphorus | 30.5 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Hancock Lake
Compare lakeside cabins, hotels, and vacation rentals near Hancock 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~54 ft est. |
| Average Depth | ~6 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Florida has not published bathymetry for Hancock Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Hancock Lake
Water Quality Trend: → Stable
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.255 m/yr | 2 |
| Phosphorus | ↑ Improving | -22.25 µg/L/yr | 3 |
County Ranking
Ranked #50 of 128 lakes in Lake County
Nearby Lakes in Lake County
Frequently asked questions about Hancock Lake
Where is Hancock Lake?
- Hancock 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 Hancock Lake?
- Hancock Lake in Lake County, Florida has a water quality grade of B (Good). Water clarity: 5.7 ft visibility. Phosphorus: 30.5 µg/L.
Is Hancock Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Hancock Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Hancock Lake?
- No published bathymetric survey covers Hancock Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 54 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Hancock Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
12 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 samples12 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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)