Sweetwater Cove Lake
Sweetwater Cove Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Phosphorus: 145.5 µg/L.
- Typical in August
- 86°F
- Type
- Hypereutrophic
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Sweetwater Cove Lake →
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Sweetwater Cove Lake is a highly nutrient-loaded hypereutrophic lake in Seminole County, Florida. Water quality is graded D based on 1 sampling years through 2020. Compared to the 121 other monitored lakes in Seminole County, Sweetwater Cove Lake ranks #120 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: 145.5 µg/L. Trophic State Index: 76.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 145.5 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 76 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Sweetwater Cove Lake
Compare lakeside cabins, hotels, and vacation rentals near Sweetwater Cove 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 Cove Lake are listed below.
Top-rated places to stay near Sweetwater Cove Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Sweetwater Cove Lake typically sits around 86°F at the surface in August. Summer average is about 87°F. Usually warmest in Jul (about 89°F) and coldest in Jan (about 64°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 66 field readings (2014–2020) via the EPA Water Quality Portal. See the full Sweetwater Cove Lake water temperature breakdown →
Fishing Sweetwater Cove Lake
EPA Impairment Status
Sweetwater Cove 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 · Matched by proximity (0.94 km)
County Ranking
Ranked #120 of 122 lakes in Seminole County
Nearby Lakes With Higher Grades
Sweetwater Cove 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 Cove Lake
Where is Sweetwater Cove Lake?
- Sweetwater Cove 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 Cove Lake?
- Sweetwater Cove Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Phosphorus: 145.5 µg/L.
Is Sweetwater Cove 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 Cove 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 Cove Lake?
- Sweetwater Cove Lake typically sits around 86°F at the surface in August, from 66 EPA Water Quality Portal field readings (2014–2020). That is a typical value for the month, not a live reading.
Explore Sweetwater Cove Lake across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Hypereutrophic Lakes in Florida
Where this data comes from
10 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 samples10 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