Orange-Adair Lake
Orange County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Orange-Adair Lake. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
Orange-Adair Lake in Orange County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 52 µg/L.
Orange-Adair Lake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Overall water quality is declining over recent sampling years. Compared to the 319 other monitored lakes in Orange County, Orange-Adair Lake ranks #284 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-07-07. Methodology: how these readings are compared.
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. Orange-Adair 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 Orange-Adair 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 Orange-Adair Lake
These are the measurements Florida DEP publishes for Orange-Adair 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 2 ft of visibility. Phosphorus 52 µg/L. TSI 64.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 52µg/L | Fair 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. | 64 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Orange-Adair Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Orange-Adair Lake typically sits around 87°F at the surface in September. Summer average is about 87°F. Usually warmest in Jun (about 87°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 (87°F).
Typical surface water temperature by month, from 36 field readings (2012–2018) via the EPA Water Quality Portal. See the full Orange-Adair Lake water temperature breakdown →
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Stays near Orange-Adair Lake
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Fishing Orange-Adair Lake
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Worsening+6.57 µg/L/yr6 years
EPA Impairment Status
Orange-Adair 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 FL2997R · Official waterbody report
Nearby Lakes in Orange County
Frequently asked questions about Orange-Adair Lake
Where is Orange-Adair Lake?
- Orange-Adair Lake is a lake in Orange County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Orange-Adair Lake?
- Orange-Adair Lake in Orange County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 52 µg/L.
Is Orange-Adair Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Orange-Adair 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 Orange-Adair Lake?
- Orange-Adair Lake typically sits around 87°F at the surface in September, from 36 EPA Water Quality Portal field readings (2012–2018). That is a typical value for the month, not a live reading.
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Where this data comes from
118 measurements from 3 monitoring stations, 2022–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX118 samples · 2022–2024
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