Dosson Lake
Hillsborough County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Dosson Lake. Here is what has been measured.
- Eutrophic
- Impaired · Impaired biota (cause unknown)
- Limited data
Dosson Lake in Hillsborough County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 3.1 ft visibility. Phosphorus: 38 µg/L.
Dosson Lake is a productive, nutrient-rich eutrophic lake in Hillsborough County, Florida. Overall water quality is declining over recent sampling years. Compared to the 123 other monitored lakes in Hillsborough County, Dosson Lake ranks #44 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-08-21. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
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. Dosson Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
Whether Dosson 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 Dosson Lake
These are the measurements Florida DEP publishes for Dosson Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 3.1 ft of visibility. Phosphorus 38 µg/L. TSI 59.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 38µg/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. | 59 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Dosson Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Dosson Lake typically sits around 72°F at the surface in November. Summer average is about 84°F. Usually warmest in Aug (about 84°F) and coldest in Feb (about 63°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (63°F) to its warmest (84°F).
Typical surface water temperature by month, from 43 field readings (2010–2024) via the EPA Water Quality Portal. See the full Dosson Lake water temperature breakdown →
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Fishing Dosson Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening5 years
Phosphorus
Worsening+1.4 µg/L/yr5 years
EPA Impairment Status
Dosson 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 FL1498Z · Official waterbody report
Nearby Lakes in Hillsborough County
Frequently asked questions about Dosson Lake
Where is Dosson Lake?
- Dosson 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 Dosson Lake?
- Dosson Lake in Hillsborough County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 3.1 ft visibility. Phosphorus: 38 µg/L.
Is Dosson Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Dosson Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
What is the water temperature of Dosson Lake?
- Dosson Lake typically sits around 72°F at the surface in November, from 43 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
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Where this data comes from
32 measurements from 3 monitoring stations, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples29 samples · 2020–2024
- Submitting organization not recorded for these samples2 samples · 2020
- Submitting organization not recorded for these samples1 sample · 2020
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