Lkminnie Lake
Seminole County, FloridaEutrophic
Lkminnie Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded D based on 2 sampling years through 2021. Compared to the 167 other monitored lakes in Seminole County, Lkminnie Lake ranks #152 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2021-08-05. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 2.3 ft of visibility. Phosphorus level: 63.5 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | F |
| Phosphorus | 63.5 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #152 of 168 lakes in Seminole County
Cleaner Lakes Within 30 Miles
Lkminnie Lake holds Grade D. 5 nearby lakes hold higher grades.
- BSeminole-Little Mary LakeSeminole County · 1.5 mi · Two grade letters higher (D → B)
- BSeminole-Mary LakeSeminole County · 1.3 mi · Two grade letters higher (D → B)
- BLake BelairSeminole County · 2 mi · Two grade letters higher (D → B)
- CEast Crystal LakeSeminole County · 1.6 mi · Higher grade (D → C)
- CEast Crystal Lake @ CenterSeminole County · 1.8 mi · Higher grade (D → C)
Nearby Lakes in Seminole County
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Lkminnie Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger.
- Seminole Co & Co App - MS4Sanford · 0.2 mi away · NPDES FLS000038Major
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Data Sources
Water quality data from the EPA Water Quality Portal
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-08-05
Monitoring stations: 1
Where to stay near Lkminnie Lake
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