Orange-Arnold Lake
Orange-Arnold Lake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 4 ft visibility. Phosphorus: 23 µg/L.
- Clarity
- 4 ft
- Typical in August
- 77°F
- Type
- Eutrophic
- Trend
- ↑ Improving
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Orange-Arnold Lake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded B based on 1 sampling years through 2025. Overall water quality is improving over recent sampling years. Compared to the 319 other monitored lakes in Orange County, Orange-Arnold Lake ranks #263 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-22. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLimited data
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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Murky, only visible to about 4 ft. Phosphorus level: 23 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4 ft | Not graded |
| Phosphorus | 23 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Orange-Arnold Lake
Compare lakeside cabins, hotels, and vacation rentals near Orange-Arnold 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-Arnold Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Orange-Arnold Lake typically sits around 77°F at the surface in August. Summer average is about 78°F. Usually warmest in Jun (about 79°F) and coldest in May (about 73°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 12 field readings (2014–2015) via the EPA Water Quality Portal. See the full Orange-Arnold Lake water temperature breakdown →
Fishing Orange-Arnold Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.348 m/yr | 5 |
| Phosphorus | ↑ Improving | -5.95 µg/L/yr | 5 |
EPA Impairment Status
Orange-Arnold Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5A).
Causes of impairment
Source: EPA ATTAINS assessment unit FL3168Z3 · Official waterbody report · Matched by proximity (0.02 km)
County Ranking
Ranked #263 of 320 lakes in Orange County
Nearby Lakes in Orange County
Frequently asked questions about Orange-Arnold Lake
Where is Orange-Arnold Lake?
- Orange-Arnold Lake is a lake in Orange County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Orange-Arnold Lake?
- Orange-Arnold Lake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 4 ft visibility. Phosphorus: 23 µg/L.
Is Orange-Arnold Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Orange-Arnold Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Orange-Arnold Lake?
- Orange-Arnold Lake typically sits around 77°F at the surface in August, from 12 EPA Water Quality Portal field readings (2014–2015). That is a typical value for the month, not a live reading.
Explore Orange-Arnold Lake across LakeQuality
Planning a trip around Canaveral?
Orange-Arnold Lake is about 40 miles from Canaveral National Seashore. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Canaveral →More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
9 measurements from 3 monitoring stations, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX9 samples · 2024–2025
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