Hancock Swf Doc Lake
Polk County, FloridaHypereutrophic
Hancock Swf Doc Lake is a highly nutrient-loaded hypereutrophic lake in Polk County, Florida. Water quality is graded F based on 2 sampling years through 2020. Compared to the 360 other monitored lakes in Polk County, Hancock Swf Doc Lake ranks #323 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2020-05-14. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 0.7 ft of visibility. Phosphorus level: 486 µg/L. Trophic State Index: 87.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.7 ft | F |
| Phosphorus | 486 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 87 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #323 of 361 lakes in Polk County
Nearby Lakes in Polk County
More Florida Lake Rankings
Other Grade F Lakes in Florida
Hypereutrophic Lakes in Florida
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Hancock Swf Doc Lake under Clean Water Act (NPDES) discharge permits.
- Ridge Generating Station LpAuburndale · 2.5 mi away · NPDES FLS132772
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)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-05-14
Monitoring stations: 1
Where to stay near Hancock Swf Doc Lake
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