Nonamelk Lake
Seminole County, FloridaEutrophic
Nonamelk Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded C based on 2 sampling years through 2025. Compared to the 167 other monitored lakes in Seminole County, Nonamelk Lake ranks #87 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-10-02. Grade methodology: LakeGrade methodology.
Watch Nonamelk Lake water quality
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Very murky, less than 3.3 ft of visibility. Phosphorus level: 24 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | D |
| Phosphorus | 24 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #87 of 168 lakes in Seminole County
Nearby Lakes in Seminole County
More Florida Lake Rankings
Other Grade C Lakes in Florida
Orange County · Clarity: 3.5 ft
Walton County · Clarity: 4.2 ft
Polk County · Clarity: 3.5 ft
Volusia County · Clarity: 4.5 ft
Walton County · Clarity: 3 ft
Alachua County · Clarity: 3 ft
Eutrophic Lakes in Florida
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Nonamelk Lake under Clean Water Act (NPDES) discharge permits.
- Racetrac No. 1338, OviedoOviedo · 1.8 mi away · NPDES FL0A00030
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: 2025-10-02
Monitoring stations: 1
Where to stay near Nonamelk Lake
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