Pinellas-Hewitt Lake
Pinellas County, FloridaMesotrophic
Pinellas-Hewitt Lake is a mesotrophic lake in Pinellas County, Florida. Water quality is graded B based on 2 sampling years through 2024. Compared to the 54 other monitored lakes in Pinellas County, Pinellas-Hewitt Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2024-12-31. Grade methodology: LakeGrade methodology.
Watch Pinellas-Hewitt Lake 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 ft. Phosphorus level: 16 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | C |
| Phosphorus | 16 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Location
County Ranking
Ranked #3 of 55 lakes in Pinellas County
Nearby Lakes in Pinellas 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
Seminole County · Clarity: 5 ft
Marion County · Clarity: 7 ft
Hillsborough County · Clarity: 6 ft
Mesotrophic Lakes in Florida
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Pinellas-Hewitt Lake under Clean Water Act (NPDES) discharge permits, including 2 classified by the EPA as major dischargers. 2 facilities have a reported Clean Water Act violation in the past three years.
- Kenneth City, Town OfKenneth City · 1.1 mi away · NPDES FLS648451MajorRecent violation
- Pinellas Park, City OfPinellas Park · 2.4 mi away · NPDES FLS648302MajorRecent 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)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-12-31
Monitoring stations: 3
Where to stay near Pinellas-Hewitt Lake
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