Lake Griffin
Lake County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Lake Griffin. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
- Limited data
Lake Griffin in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 22 µg/L.
Lake Griffin is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water clarity is improving over recent sampling years. Compared to the 127 other monitored lakes in Lake County, Lake Griffin ranks #45 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-06-02. Methodology: how these readings are compared.
For a place on the water, look through cabin and lake-house rentals near Lake Griffin on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
Swimming conditions
Readings onlyRecreation use not supported
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. Lake Griffin is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Lake Griffin 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 Lake Griffin
These are the measurements Florida DEP publishes for Lake Griffin, 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 2.3 ft of visibility. Phosphorus 22 µg/L. TSI 57.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 22µg/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. | 57 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake Griffin
Answers come straight from the public measurements and survey records on this page.
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Stays near Lake Griffin
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Fishing Lake Griffin
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Worsening+3.65 µg/L/yr6 years
EPA Impairment Status
Lake Griffin 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 FL2814A · Official waterbody report
Nearby Lakes in Lake County
Frequently asked questions about Lake Griffin
Where is Lake Griffin?
- Lake Griffin 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 Lake Griffin?
- Lake Griffin in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.3 ft visibility. Phosphorus: 22 µg/L.
Is Lake Griffin safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Griffin is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
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Where this data comes from
15 measurements from 3 monitoring stations, 2022–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples14 samples · 2022–2023
- Submitting organization not recorded for these samples1 sample · 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