Lake Lily
Orange County, FloridaEutrophic
Lake Lily is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded C based on 2 sampling years through 2025. Compared to the 531 other monitored lakes in Orange County, Lake Lily ranks #318 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-09-22. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 5.9 ft. Phosphorus level: 38 µg/L. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.9 ft | C |
| Phosphorus | 38 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #318 of 532 lakes in Orange County
Cleaner Lakes Within 30 Miles
Lake Lily holds Grade C. 5 nearby lakes hold higher grades.
- ALake CatherineOrange County · 0.3 mi · Two grade letters higher (C → A)
- ALake SybeliaOrange County · 0.6 mi · Two grade letters higher (C → A)
- BOrange-Eulalia LakeOrange County · 0.4 mi · Higher grade (C → B)
- BLake EulaliaOrange County · 0.4 mi · Higher grade (C → B)
- BOrange-Sybelia LakeOrange County · 0.6 mi · Higher grade (C → B)
Nearby Lakes in Orange County
More Florida Lake Rankings
Other Grade C Lakes in Florida
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
Seminole County · Clarity: 3 ft
Eutrophic Lakes in Florida
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Lake Lily under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger.
- Maitland, City OfMaitland · 0.3 mi away · NPDES FLS266825Major
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)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-09-22
Monitoring stations: 2
Where to stay near Lake Lily
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