Twin Lake South Lobe
Okaloosa County, FloridaHypereutrophic
Twin Lake South Lobe is a highly nutrient-loaded hypereutrophic lake in Okaloosa County, Florida. Water quality is graded F based on 2 sampling years through 2025. Compared to the 23 other monitored lakes in Okaloosa County, Twin Lake South Lobe ranks #23 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-08-27. 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 2 ft of visibility. Phosphorus level: 440 µg/L. Trophic State Index: 80.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | F |
| Phosphorus | 440 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 80 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #23 of 24 lakes in Okaloosa County
Cleaner Lakes Within 30 Miles
Twin Lake South Lobe holds Grade F. 2 nearby lakes hold higher grades.
- BLake EarlOkaloosa County · 7.2 mi · Two grade letters higher (F → B)
- DTwin Lake Eastern LakeOkaloosa County · 0.2 mi · Higher grade (F → D)
Nearby Lakes in Okaloosa 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: 2025-08-27
Monitoring stations: 2
Where to stay near Twin Lake South Lobe
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