Lake Ariana
Polk County, FloridaEutrophic
Lake Ariana is a productive, nutrient-rich eutrophic lake in Polk County, Florida. Water quality is graded C based on 2 sampling years through 2023. Compared to the 360 other monitored lakes in Polk County, Lake Ariana ranks #140 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2023-02-07. 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 2.1 ft of visibility. Phosphorus level: 23 µg/L. Trophic State Index: 58.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.1 ft | F |
| Phosphorus | 23 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #140 of 361 lakes in Polk County
Cleaner Lakes Within 30 Miles
Lake Ariana holds Grade C. 3 nearby lakes hold higher grades.
- BPolk-Whistler LakePolk County · 1.2 mi · Higher grade (C → B)
- CLake Whistler @ DockPolk County · 1.2 mi · Higher overall water quality score
- CPolk-Arietta LakePolk County · 2 mi · Higher overall water quality score
Nearby Lakes in Polk 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
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 Ariana under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger.
- Auburndale City OfAuburndale · 0.1 mi away · NPDES FLS266604Major
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: 2023-02-07
Monitoring stations: 2
Where to stay near Lake Ariana
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