Seminole-Howell Lake
Seminole-Howell Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2 ft visibility. Phosphorus: 100 µg/L.
- Clarity
- 2 ft
- Typical in August
- 88°F
- Type
- Eutrophic
- Trend
- ↓ Declining
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Seminole-Howell Lake →
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Seminole-Howell Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded D based on 1 sampling years through 2023. Overall water quality is declining over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Seminole-Howell Lake ranks #119 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-06-17. 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)
Very murky, less than 2 ft of visibility. Phosphorus level: 100 µg/L. Trophic State Index: 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | Not graded |
| Phosphorus | 100 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 69 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Seminole-Howell Lake
Compare lakeside cabins, hotels, and vacation rentals near Seminole-Howell 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-Howell Lake are listed below.
Top-rated places to stay near Seminole-Howell Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Seminole-Howell Lake typically sits around 88°F at the surface in August. Summer average is about 87°F. Usually warmest in Jul (about 88°F) and coldest in Jan (about 63°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 71 field readings (2010–2025) via the EPA Water Quality Portal. See the full Seminole-Howell Lake water temperature breakdown →
Fishing Seminole-Howell Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.06 m/yr | 5 |
| Phosphorus | ↓ Declining | +8.6 µg/L/yr | 5 |
EPA Impairment Status
Seminole-Howell Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5A).
Causes of impairment
Source: EPA ATTAINS assessment unit FL2997B · Official waterbody report · Matched by proximity (0.06 km)
County Ranking
Ranked #119 of 122 lakes in Seminole County
Nearby Lakes With Higher Grades
Seminole-Howell Lake holds Grade D. 2 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 Seminole-Howell Lake
Where is Seminole-Howell Lake?
- Seminole-Howell 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-Howell Lake?
- Seminole-Howell Lake in Seminole County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2 ft visibility. Phosphorus: 100 µg/L.
Is Seminole-Howell 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-Howell Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
What is the water temperature of Seminole-Howell Lake?
- Seminole-Howell Lake typically sits around 88°F at the surface in August, from 71 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Seminole-Howell Lake across LakeQuality
Planning a trip around Canaveral?
Seminole-Howell Lake is about 35 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
12 measurements from 3 monitoring stations, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX12 samples · 2023
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