Hillsborough-Calm Lake
Hillsborough County, FloridaLimited DataMesotrophic
Hillsborough-Calm Lake is a mesotrophic lake in Hillsborough County, Florida. Water quality is graded C based on 1 sampling years through 2025. Compared to the 221 other monitored lakes in Hillsborough County, Hillsborough-Calm Lake ranks #107 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2025-05-06. Grade methodology: LakeGrade methodology.
Watch Hillsborough-Calm Lake water quality
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 7.8 ft. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.8 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Location
County Ranking
Ranked #107 of 222 lakes in Hillsborough County
Cleaner Lakes Within 30 Miles
Hillsborough-Calm Lake holds Grade C. 5 nearby lakes hold higher grades.
- AHillsborough-Mound LakeHillsborough County · 0.7 mi · Two grade letters higher (C → A)
- AHillsborough-Elizabeth LakeHillsborough County · 1.1 mi · Two grade letters higher (C → A)
- BHillsborough-Keystone LakeHillsborough County · 0.9 mi · Higher grade (C → B)
- BWoodctr LakeHillsborough County · 0.9 mi · Higher grade (C → B)
- BHillsborough-Island Ford LakeHillsborough County · 1.1 mi · Higher grade (C → B)
Nearby Lakes in Hillsborough 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
Mesotrophic Lakes in Florida
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-05-06
Monitoring stations: 3
Where to stay near Hillsborough-Calm Lake
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