Orange-Adair Lake
Orange-Adair Lake in Orange County, Florida has a water quality grade of C (Fair). Water clarity: 2 ft visibility. Phosphorus: 52 µg/L.
- Clarity
- 2 ft
- Typical in July
- 86°F
- Type
- Eutrophic
- Trend
- ↓ Declining
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Orange-Adair Lake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded C based on 1 sampling years through 2024. 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. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyModerate
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Very murky, less than 2 ft of visibility. Phosphorus level: 52 µg/L. Trophic State Index: 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | Not graded |
| Phosphorus | 52 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Orange-Adair Lake
Compare lakeside cabins, hotels, and vacation rentals near Orange-Adair Lake in Orange County, Florida — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Orange-Adair Lake
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Water Temperature
Orange-Adair Lake typically sits around 86°F at the surface in July. 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.
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 →
Fishing Orange-Adair Lake
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.048 m/yr | 6 |
| Phosphorus | ↓ Declining | +6.57 µg/L/yr | 6 |
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
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2997R · Official waterbody report · Matched by proximity (0.04 km)
County Ranking
Ranked #284 of 320 lakes in Orange County
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. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Orange-Adair Lake?
- Orange-Adair Lake in Orange County, Florida has a water quality grade of C (Fair). Water clarity: 2 ft visibility. Phosphorus: 52 µg/L.
Is Orange-Adair Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Orange-Adair Lake has a water quality grade of C (Fair). Always check local health department advisories before swimming.
What is the water temperature of Orange-Adair Lake?
- Orange-Adair Lake typically sits around 86°F at the surface in July, from 36 EPA Water Quality Portal field readings (2012–2018). That is a typical value for the month, not a live reading.
Explore Orange-Adair Lake across LakeQuality
More Florida Lake Rankings
Other Grade C Lakes in Florida
Eutrophic Lakes in Florida
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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database