Lake Thonotasassa Center
Lake Thonotasassa Center in Hillsborough County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 1.3 ft visibility. Phosphorus: 349 µg/L.
- Clarity
- 1.3 ft
- Typical in August
- 86°F
- Type
- Hypereutrophic
- Trend
- → Stable
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Lake Thonotasassa Center →
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Lake Thonotasassa Center is a highly nutrient-loaded hypereutrophic lake in Hillsborough County, Florida. Water quality is graded D based on 1 sampling years through 2025. Water clarity is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 123 other monitored lakes in Hillsborough County, Lake Thonotasassa Center ranks #96 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-07-23. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyBacteria A
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Based on E. coli testing, Lake Thonotasassa Center never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 87 samples across 8 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Water Quality Grade: D (Nutrient-rich)
Very murky, less than 1.3 ft of visibility. Phosphorus level: 349 µg/L. Trophic State Index: 81.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 ft | Not graded |
| Phosphorus | 349 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 81 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Lake Thonotasassa Center
Compare lakeside cabins, hotels, and vacation rentals near Lake Thonotasassa Center in Hillsborough County, Florida — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Lake Thonotasassa Center are listed below.
Top-rated places to stay near Lake Thonotasassa Center
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Water Temperature
Lake Thonotasassa Center typically sits around 86°F at the surface in August. Summer average is about 86°F. Usually warmest in Jun (about 86°F) and coldest in Jan (about 62°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 494 field readings (2010–2025) via the EPA Water Quality Portal. See the full Lake Thonotasassa Center water temperature breakdown →
Recreation & Access
- Baker Creek Public Boat RampPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Thonotasassa Center
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.029 m/yr | 6 |
| Phosphorus | ↓ Declining | +8.56 µg/L/yr | 6 |
EPA Impairment Status
Lake Thonotasassa Center is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL1522B · Official waterbody report · Matched by proximity (0.13 km)
County Ranking
Ranked #96 of 124 lakes in Hillsborough County
Nearby Lakes in Hillsborough County
Frequently asked questions about Lake Thonotasassa Center
Where is Lake Thonotasassa Center?
- Lake Thonotasassa Center is a lake in Hillsborough County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Thonotasassa Center?
- Lake Thonotasassa Center in Hillsborough County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 1.3 ft visibility. Phosphorus: 349 µg/L.
Is Lake Thonotasassa Center safe to swim in?
- Based on E. coli testing, Lake Thonotasassa Center never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 87 samples across 8 seasons. That works out to a bacteria swim-safety grade of A — a historical summary of past testing, not a current reading. Lake Thonotasassa Center has a water quality grade of D (Nutrient-rich). Bacteria levels can spike quickly after heavy rain, so always check Florida's current beach and health-department advisories before you swim.
What is the water temperature of Lake Thonotasassa Center?
- Lake Thonotasassa Center typically sits around 86°F at the surface in August, from 494 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Are there boat ramps on Lake Thonotasassa Center?
- Lake Thonotasassa Center has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Baker Creek Public Boat Ramp. Public access is listed as yes.
Explore Lake Thonotasassa Center across LakeQuality
More Florida Lake Rankings
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Where this data comes from
126 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples126 samples · 2020–2025
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory