Union-Butler Lake
Union County, FloridaEutrophic
Union-Butler Lake is a productive, nutrient-rich eutrophic lake in Union County, Florida. Water quality is graded C based on 2 sampling years through 2025. Compared to the 17 other monitored lakes in Union County, Union-Butler Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-02-21. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Very murky, less than 3 ft of visibility. Phosphorus level: 23 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | D |
| Phosphorus | 23 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #1 of 18 lakes in Union County
Nearby Lakes in Union County
More Florida Lake Rankings
Other Grade C Lakes in Florida
Orange County · Clarity: 3.5 ft
Walton County · Clarity: 4.2 ft
Seminole County · Clarity: 4.5 ft
Seminole County · Clarity: 2.9 ft
Polk County · Clarity: 3.5 ft
Volusia County · Clarity: 4.5 ft
Eutrophic Lakes in Florida
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-02-21
Monitoring stations: 3
Where to stay near Union-Butler Lake
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