Alachua-Newnan Lake
Alachua County, FloridaHypereutrophic
Alachua-Newnan Lake is a highly nutrient-loaded hypereutrophic lake in Alachua County, Florida. Water quality is graded F based on 2 sampling years through 2025. Compared to the 101 other monitored lakes in Alachua County, Alachua-Newnan Lake ranks #80 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-03-25. 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 1.3 ft of visibility. Phosphorus level: 198 µg/L. Trophic State Index: 77.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 ft | F |
| Phosphorus | 198 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 77 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #80 of 102 lakes in Alachua County
Cleaner Lakes Within 30 Miles
Alachua-Newnan Lake holds Grade F. 3 nearby lakes hold higher grades.
- DNewnans LakeAlachua County · 0.8 mi · Higher grade (F → D)
- DNew LakeAlachua County · 0.8 mi · Higher grade (F → D)
- DNewnsotst LakeAlachua County · 0.9 mi · Higher grade (F → D)
Nearby Lakes in Alachua 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: 2025-03-25
Monitoring stations: 3
Where to stay near Alachua-Newnan Lake
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