Sla Lake
Sla Lake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 1.3 ft visibility. Phosphorus: 34 µg/L.
- Clarity
- 1.3 ft
- Typical in August
- 87°F
- Type
- Eutrophic
- Trend
- → Stable
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Sla Lake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded B based on 1 sampling years through 2025. Water clarity is improving over recent sampling years. Compared to the 319 other monitored lakes in Orange County, Sla Lake ranks #68 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-04-14. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLow algae
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)
Very murky, less than 1.3 ft of visibility. Phosphorus level: 34 µg/L. Trophic State Index: 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 ft | Not graded |
| Phosphorus | 34 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Sla Lake
Compare lakeside cabins, hotels, and vacation rentals near Sla 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 Sla Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Sla Lake typically sits around 87°F at the surface in August. Summer average is about 85°F. Usually warmest in Aug (about 87°F) and coldest in Jan (about 54°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 93 field readings (2010–2025) via the EPA Water Quality Portal. See the full Sla Lake water temperature breakdown →
Fishing Sla Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.014 m/yr | 5 |
| Phosphorus | ↓ Declining | +3.4 µg/L/yr | 5 |
EPA Impairment Status
Sla 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 FL2835C · Official waterbody report · Matched by proximity (2.9 km)
County Ranking
Ranked #68 of 320 lakes in Orange County
Nearby Lakes in Orange County
Frequently asked questions about Sla Lake
Where is Sla Lake?
- Sla 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 Sla Lake?
- Sla Lake in Orange County, Florida has a water quality grade of B (Good). Water clarity: 1.3 ft visibility. Phosphorus: 34 µg/L.
Is Sla Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Sla Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Sla Lake?
- Sla Lake typically sits around 87°F at the surface in August, from 93 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Sla Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
93 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- St. Johns River Water Management District
21FLSJWM_WQX93 samples · 2020–2025
Monitoring station identifiers (1)
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