Hillsborough-White Trout Lake
Hillsborough County, Florida75 acresView mapDirections
Florida DEP publishes the water-quality measurements for Hillsborough-White Trout Lake. Here is what has been measured.
- Oligotrophic
- Impaired · Impaired biota (cause unknown)
Hillsborough-White Trout Lake in Hillsborough County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 12 µg/L. Surface area: 75 acres.
Hillsborough-White Trout Lake is a 75-acre cold, clear oligotrophic lake in Hillsborough County, Florida. Overall water quality is declining over recent sampling years. Compared to the 123 other monitored lakes in Hillsborough County, Hillsborough-White Trout Lake ranks #54 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-04-06. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Hillsborough-White Trout Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
Whether Hillsborough-White Trout Lake is safe to swim in today is a call for the Florida Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Hillsborough-White Trout Lake
These are the measurements Florida DEP publishes for Hillsborough-White Trout Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 12 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 12µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 40 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Hillsborough-White Trout Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
75 acres
No bathymetric survey has been published for Hillsborough-White Trout Lake, so its depth is not documented here.
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Fishing Hillsborough-White Trout Lake
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening5 years
Phosphorus
Worsening+8.69 µg/L/yr6 years
Reservoir Info (USACE NID)
Hillsborough-White Trout Lake is a man-made reservoir impounded by the White Trout Water Conservation Structure, built primarily for flood risk reduction on the White Trout Lake; earth-type dam, 17 ft tall and 334 ft long.
- Surface area
- 75 ac
- Normal storage
- 203 ac-ft
- Max storage
- 4,102 ac-ft
- Hazard class
- Significant
- Owner
- SWFWMD
All listed purposes: Flood Risk Reduction;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID FL12027 · Operator website · Matched by proximity (0.62 km)
EPA Impairment Status
Hillsborough-White Trout Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit FL1516F · Official waterbody report
Nearby Lakes in Hillsborough County
Frequently asked questions about Hillsborough-White Trout Lake
Where is Hillsborough-White Trout Lake?
- Hillsborough-White Trout Lake is a lake in Hillsborough County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Hillsborough-White Trout Lake?
- Hillsborough-White Trout Lake in Hillsborough County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 12 µg/L. Surface area: 75 acres.
Is Hillsborough-White Trout Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Hillsborough-White Trout Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
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Where this data comes from
74 measurements from 3 monitoring stations, 2021–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX74 samples · 2021–2025
Monitoring station identifiers (3)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database