Lakejem
Lake County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Lakejem. Here is what has been measured.
- Impaired · Impaired biota (cause unknown)
- Limited data
Lakejem in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 6.2 ft visibility. Phosphorus: 13 µg/L.
Lakejem is a lake in Lake County, Florida. Water clarity is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-07-09. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Lakejem is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
Whether Lakejem 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 Lakejem
These are the measurements Florida DEP publishes for Lakejem, 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 6.2 ft. Phosphorus 13 µg/L. TSI 46.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 13µg/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. | 46 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lakejem
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lakejem typically sits around 86°F at the surface in September. Summer average is about 88°F. Usually warmest in Jun (about 88°F) and coldest in Feb (about 60°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (60°F) to its warmest (88°F).
Typical surface water temperature by month, from 38 field readings (2010–2024) via the EPA Water Quality Portal. See the full Lakejem water temperature breakdown →
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Stays near Lakejem
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Fishing Lakejem
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Worsening+0.77 µg/L/yr6 years
EPA Impairment Status
Lakejem 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 FL2837A · Official waterbody report
Nearby Lakes in Lake County
Frequently asked questions about Lakejem
Where is Lakejem?
- Lakejem is a lake in Lake County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Lakejem?
- Lakejem in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 6.2 ft visibility. Phosphorus: 13 µg/L.
Is Lakejem safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lakejem 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 Lakejem?
- Lakejem typically sits around 86°F at the surface in September, from 38 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
Explore Lakejem across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples2 samples · 2024
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