Lake Hayes
Seminole County, FloridaEutrophic
Lake Hayes is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded B based on 2 sampling years through 2025. Compared to the 167 other monitored lakes in Seminole County, Lake Hayes ranks #45 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-06-10. Grade methodology: LakeGrade methodology.
Watch Lake Hayes 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 5.1 ft. Phosphorus level: 20.5 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.1 ft | C |
| Phosphorus | 20.5 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #45 of 168 lakes in Seminole County
Cleaner Lakes Within 30 Miles
Lake Hayes holds Grade B. 4 nearby lakes hold higher grades.
- AOrange-Lee LakeOrange County · 2.9 mi · Higher grade (B → A)
- BOrange-Claire LakeOrange County · 1.7 mi · Higher overall water quality score
- BGeorgia LakeOrange County · 2.8 mi · Higher overall water quality score
- BOrange-Price LakeOrange County · 3.2 mi · Higher overall water quality score
Nearby Lakes in Seminole 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
Marion County · Clarity: 7 ft
Hillsborough County · Clarity: 6 ft
Walton County · Clarity: 4 ft
Eutrophic Lakes in Florida
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Lake Hayes under Clean Water Act (NPDES) discharge permits, including 2 classified by the EPA as major dischargers. 1 facility has a reported Clean Water Act violation in the past three years.
- Orlando/Iron Bridge Regional WrfOviedo · 0.7 mi away · NPDES FL0037966MajorRecent violation
- Oviedo, City OfOviedo · 1.4 mi away · NPDES FLS266558Major
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: 2025-06-10
Monitoring stations: 1
Where to stay near Lake Hayes
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