Lake Earl
Okaloosa County, FloridaMesotrophic
Lake Earl is a mesotrophic lake in Okaloosa County, Florida. Water quality is graded B based on 2 sampling years through 2025. Compared to the 23 other monitored lakes in Okaloosa County, Lake Earl ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-07-21. Grade methodology: LakeGrade methodology.
Watch Lake Earl water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 5.2 ft. Phosphorus level: 17 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.2 ft | C |
| Phosphorus | 17 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Location
County Ranking
Ranked #9 of 24 lakes in Okaloosa County
Nearby Lakes in Okaloosa County
More Florida Lake Rankings
Other Grade B Lakes in Florida
Bay County · Clarity: 4 ft
Brevard County · Clarity: 9.8 ft
Alachua County · Clarity: 5.5 ft
Seminole County · Clarity: 5 ft
Marion County · Clarity: 7 ft
Hillsborough County · Clarity: 6 ft
Mesotrophic Lakes in Florida
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-07-21
Monitoring stations: 1
Where to stay near Lake Earl
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