Northern Lake
Lee County, FloridaLimited DataHypereutrophic
Northern Lake is a highly nutrient-loaded hypereutrophic lake in Lee County, Florida. Water quality is graded F based on 1 sampling years through 2025. Compared to the 81 other monitored lakes in Lee County, Northern Lake ranks #75 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-04-22. 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: 121 µg/L. Trophic State Index: 73.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 121 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 73 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #75 of 82 lakes in Lee County
Nearby Lakes in Lee County
More Florida Lake Rankings
Other Grade F Lakes in Florida
Hypereutrophic Lakes in Florida
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-04-22
Monitoring stations: 1
Where to stay near Northern Lake
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