Greenwood Lake
Greenwood Lake in Seminole County, Florida has a water quality grade of B (Good). Phosphorus: 29 µg/L.
- Typical in August
- 89°F
- Type
- Eutrophic
- Trend
- ↓ Declining
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Greenwood Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded B based on 1 sampling years through 2024. Overall water quality is declining over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Greenwood Lake ranks #88 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-12-23. 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)
No clarity data. Phosphorus level: 29 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 29 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 Greenwood Lake
Compare lakeside cabins, hotels, and vacation rentals near Greenwood Lake in Seminole 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 Greenwood Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Greenwood Lake typically sits around 89°F at the surface in August. Summer average is about 89°F. Usually warmest in Jul (about 91°F) and coldest in Jan (about 56°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 66 field readings (2010–2025) via the EPA Water Quality Portal. See the full Greenwood Lake water temperature breakdown →
Fishing Greenwood Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +5.75 µg/L/yr | 5 |
EPA Impairment Status
Greenwood Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2986 · Official waterbody report · Matched by proximity (2.21 km)
County Ranking
Ranked #88 of 122 lakes in Seminole County
Nearby Lakes in Seminole County
Frequently asked questions about Greenwood Lake
Where is Greenwood Lake?
- Greenwood Lake is a lake in Seminole County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Greenwood Lake?
- Greenwood Lake in Seminole County, Florida has a water quality grade of B (Good). Phosphorus: 29 µg/L.
Is Greenwood Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Greenwood Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Greenwood Lake?
- Greenwood Lake typically sits around 89°F at the surface in August, from 66 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Greenwood Lake across LakeQuality
Planning a trip around Canaveral?
Greenwood Lake is about 36 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
32 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples32 samples · 2020–2024
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