Sweetwater Creek Lake
Sweetwater Creek Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Phosphorus: 106 µg/L.
- Typical in August
- 81°F
- Type
- Hypereutrophic
- Trend
- → Stable
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Sweetwater Creek Lake →
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Sweetwater Creek Lake is a highly nutrient-loaded hypereutrophic lake in Seminole County, Florida. Water quality is graded D based on 1 sampling years through 2020. Water clarity is declining over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Sweetwater Creek Lake ranks #122 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2020-12-07. 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.
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)
No clarity data. Phosphorus level: 106 µg/L. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 106 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Sweetwater Creek Lake
Compare lakeside cabins, hotels, and vacation rentals near Sweetwater Creek 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 Sweetwater Creek Lake are listed below.
Top-rated places to stay near Sweetwater Creek Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Sweetwater Creek Lake typically sits around 81°F at the surface in August. Summer average is about 80°F. Usually warmest in Jul (about 82°F) and coldest in Jan (about 66°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 64 field readings (2014–2020) via the EPA Water Quality Portal. See the full Sweetwater Creek Lake water temperature breakdown →
Fishing Sweetwater Creek Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.315 m/yr | 4 |
| Phosphorus | ↑ Improving | -16.75 µg/L/yr | 5 |
EPA Impairment Status
Sweetwater Creek Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit FL2956X · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Sweetwater Creek Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Wekiva Hunt Club WrfCasselberry · 0.6 mi away · NPDES FL0036251MajorRecent violation
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 #122 of 122 lakes in Seminole County
Nearby Lakes With Higher Grades
Sweetwater Creek Lake holds Grade D. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Seminole County
Frequently asked questions about Sweetwater Creek Lake
Where is Sweetwater Creek Lake?
- Sweetwater Creek 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 Sweetwater Creek Lake?
- Sweetwater Creek Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Phosphorus: 106 µg/L.
Is Sweetwater Creek 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. Sweetwater Creek Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
What is the water temperature of Sweetwater Creek Lake?
- Sweetwater Creek Lake typically sits around 81°F at the surface in August, from 64 EPA Water Quality Portal field readings (2014–2020). That is a typical value for the month, not a live reading.
Explore Sweetwater Creek Lake across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Hypereutrophic Lakes in Florida
Where this data comes from
9 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples9 samples · 2020
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)