Ntwinsh Lake
Lake County, FloridaLimited DataHypereutrophic
Ntwinsh Lake is a highly nutrient-loaded hypereutrophic lake in Lake County, Florida. Water quality is graded F based on 1 sampling years through 2025. Compared to the 316 other monitored lakes in Lake County, Ntwinsh Lake ranks #311 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-04-30. 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
No clarity data. Phosphorus level: 218.5 µg/L. Trophic State Index: 82.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 218.5 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 82 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #311 of 317 lakes in Lake County
Cleaner Lakes Within 30 Miles
Ntwinsh Lake holds Grade F. 2 nearby lakes hold higher grades.
Nearby Lakes in Lake 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.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-04-30
Monitoring stations: 1
Where to stay near Ntwinsh Lake
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