Seminole-East Lake
Seminole-East Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 3.5 ft visibility. Phosphorus: 60.5 µg/L.
- Clarity
- 3.5 ft
- Type
- Eutrophic
- Trend
- → Stable
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Seminole-East Lake →
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Seminole-East Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded D based on 1 sampling years through 2025. Water clarity is declining over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Seminole-East Lake ranks #112 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-19. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyElevated nutrients
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.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 3.5 ft. Phosphorus level: 60.5 µg/L. Trophic State Index: 61.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.5 ft | Not graded |
| Phosphorus | 60.5 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Seminole-East Lake
Compare lakeside cabins, hotels, and vacation rentals near Seminole-East 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Seminole-East Lake are listed below.
Top-rated places to stay near Seminole-East Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Fishing Seminole-East Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.13 m/yr | 5 |
| Phosphorus | ↑ Improving | -2.55 µg/L/yr | 5 |
EPA Impairment Status
Seminole-East 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 FL2986E · Official waterbody report · Matched by proximity (1.12 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Seminole-East Lake under Clean Water Act (NPDES) discharge permits.
- Sprague Electronics Ground WatLongwood · 1.7 mi away · NPDES FL0171565
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
County Ranking
Ranked #112 of 122 lakes in Seminole County
Nearby Lakes With Higher Grades
Seminole-East Lake holds Grade D. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Seminole County
Frequently asked questions about Seminole-East Lake
Where is Seminole-East Lake?
- Seminole-East Lake is a lake in Seminole County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Seminole-East Lake?
- Seminole-East Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 3.5 ft visibility. Phosphorus: 60.5 µg/L.
Is Seminole-East Lake safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Seminole-East Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
Explore Seminole-East Lake across LakeQuality
Planning a trip around Canaveral?
Seminole-East 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 D Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
306 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX306 samples · 2020–2025
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)