Sumter-Deaton Lake
Sumter County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Sumter-Deaton Lake. Here is what has been measured.
- Mesotrophic
- Impaired · Mercury
- Limited data
Sumter-Deaton Lake in Sumter County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.5 ft visibility. Phosphorus: 12 µg/L.
Sumter-Deaton Lake is a mesotrophic lake in Sumter County, Florida. Water clarity is declining over recent sampling years. Compared to the 10 other monitored lakes in Sumter County, Sumter-Deaton Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2020-07-02. 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. Sumter-Deaton Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Sumter-Deaton 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 Sumter-Deaton Lake
These are the measurements Florida DEP publishes for Sumter-Deaton Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.5 ft. Phosphorus 12 µg/L. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.5ft | Measured, not scored 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. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Fishing Sumter-Deaton Lake
Water quality readings over time
2 seasons of samples on record (2020–2021). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening2 years
Phosphorus
Improving-0.5 µg/L/yr2 years
EPA Impairment Status
Sumter-Deaton Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL1349A · Official waterbody report
Nearby Lakes in Sumter County
Frequently asked questions about Sumter-Deaton Lake
Where is Sumter-Deaton Lake?
- Sumter-Deaton Lake is a lake in Sumter County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Sumter-Deaton Lake?
- Sumter-Deaton Lake in Sumter County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.5 ft visibility. Phosphorus: 12 µg/L.
Is Sumter-Deaton Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Sumter-Deaton Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
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Where this data comes from
18 measurements from 3 monitoring stations, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX18 samples · 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