Manatee-Tojo Lake
Manatee County, FloridaHypereutrophic
Manatee-Tojo Lake is a highly nutrient-loaded hypereutrophic lake in Manatee County, Florida. Water quality is graded F based on 2 sampling years through 2022. Compared to the 10 other monitored lakes in Manatee County, Manatee-Tojo Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, Florida DNR, last sampled 2022-11-15. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.5 ft of visibility. Phosphorus level: 170 µg/L. Trophic State Index: 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 ft | F |
| Phosphorus | 170 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #8 of 11 lakes in Manatee County
Cleaner Lakes Within 30 Miles
Manatee-Tojo Lake holds Grade F. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Manatee County
More Florida Lake Rankings
Other Grade F Lakes in Florida
Hypereutrophic Lakes in Florida
Regulated Pollution Sources Nearby
6 EPA-permitted facilities operate within about 5 miles of Manatee-Tojo 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.
- Palmetto Wwtp City OfPalmetto · 4.8 mi away · NPDES FL0020401MajorRecent violation
- Palmetto, City OfPalmetto · 3.8 mi away · NPDES FLS267325Major
- Piney Point Phosphogypsum Stack SystemPalmetto · 3.6 mi away · NPDES FL0000124Recent violation
- Miami Valley Concrete Co. - ElEllenton · 3.5 mi away · NPDES FL0126411
- Transmontaigne Partners LpPalmetto · 4.1 mi away · NPDES FL0036056
- Sta-2Unincorporated · 4.2 mi away · NPDES FL0177946
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: 2022-11-15
Monitoring stations: 3
Where to stay near Manatee-Tojo Lake
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