Ll Harris Sw Sh Lake
Lake County, FloridaEutrophic
Ll Harris Sw Sh Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water quality is graded C based on 2 sampling years through 2024. Compared to the 316 other monitored lakes in Lake County, Ll Harris Sw Sh Lake ranks #188 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2024-08-26. Grade methodology: LakeGrade methodology.
Watch Ll Harris Sw Sh 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 2.6 ft of visibility. Phosphorus level: 18 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.6 ft | F |
| Phosphorus | 18 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #188 of 317 lakes in Lake County
Cleaner Lakes Within 30 Miles
Ll Harris Sw Sh Lake holds Grade C. 2 nearby lakes hold higher grades.
- BLittle Lk Harris S Ctr LakeLake County · 1.1 mi · Higher grade (C → B)
- BIdameresshdk LakeLake County · 3.7 mi · Higher grade (C → B)
Nearby Lakes in Lake 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
Polk County · Clarity: 3.5 ft
Volusia County · Clarity: 4.5 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 Ll Harris Sw Sh Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Silver Springs Citrus/SprayfieldsHowey In The Hills · 0.6 mi away · NPDES FL0175412Recent violation
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: 2024-08-26
Monitoring stations: 1
Where to stay near Ll Harris Sw Sh Lake
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