Doctrbysct Lake
Clay County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Doctrbysct Lake. Here is what has been measured.
- Impaired · Algal growth
- Limited data
Doctrbysct Lake in Clay County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 86 µg/L.
Doctrbysct Lake is a lake in Clay County, Florida. Water clarity is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-06-28. Methodology: how these readings are compared.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Doctrbysct Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Doctrbysct 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 Doctrbysct Lake
These are the measurements Florida DEP publishes for Doctrbysct 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 1.6 ft of visibility. Phosphorus 86 µg/L. TSI 69.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 86µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| 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. | 69 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Doctrbysct Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Doctrbysct Lake typically sits around 85°F at the surface in September. Summer average is about 87°F. Usually warmest in Aug (about 88°F) and coldest in Jun (about 85°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (85°F) to its warmest (88°F).
Typical surface water temperature by month, from 23 field readings (2018–2024) via the EPA Water Quality Portal. See the full Doctrbysct Lake water temperature breakdown →
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Fishing Doctrbysct Lake
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Worsening+3.58 µg/L/yr6 years
EPA Impairment Status
Doctrbysct 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: Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2389 · Official waterbody report
Nearby Lakes in Clay County
Frequently asked questions about Doctrbysct Lake
Where is Doctrbysct Lake?
- Doctrbysct Lake is a lake in Clay County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Doctrbysct Lake?
- Doctrbysct Lake in Clay County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 86 µg/L.
Is Doctrbysct Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Doctrbysct Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
What is the water temperature of Doctrbysct Lake?
- Doctrbysct Lake typically sits around 85°F at the surface in September, from 23 EPA Water Quality Portal field readings (2018–2024). That is a typical value for the month, not a live reading.
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Where this data comes from
2 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FL Dept. of Environmental Protection, Northeast District
21FLA_WQX2 samples · 2021
Monitoring station identifiers (1)
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