Nonamelk Lake
Nonamelk Lake in Seminole County, Florida has a water quality grade of B (Good). Water clarity: 3.3 ft visibility. Phosphorus: 24 µg/L.
- Clarity
- 3.3 ft
- Typical in August
- 86°F
- Type
- Eutrophic
- Trend
- → Stable
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Nonamelk Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded B 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, Nonamelk Lake ranks #92 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-10-02. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyBacteria A
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.
Based on E. coli testing, Nonamelk Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 10 samples across 2 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Water Quality Grade: B (Good)
Very murky, less than 3.3 ft of visibility. Phosphorus level: 24 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | Not graded |
| Phosphorus | 24 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Nonamelk Lake
Compare lakeside cabins, hotels, and vacation rentals near Nonamelk 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 Nonamelk Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Nonamelk Lake typically sits around 86°F at the surface in August. Summer average is about 87°F. Usually warmest in Jun (about 87°F) and coldest in Jan (about 62°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 41 field readings (2017–2025) via the EPA Water Quality Portal. See the full Nonamelk Lake water temperature breakdown →
Fishing Nonamelk Lake
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.489 m/yr | 6 |
| Phosphorus | ↑ Improving | -2.17 µg/L/yr | 6 |
EPA Impairment Status
Nonamelk 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 FL2999B · Official waterbody report · Matched by proximity (0.01 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Nonamelk Lake under Clean Water Act (NPDES) discharge permits.
- Racetrac No. 1338, OviedoOviedo · 1.8 mi away · NPDES FL0A00030
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 #92 of 122 lakes in Seminole County
Nearby Lakes in Seminole County
Frequently asked questions about Nonamelk Lake
Where is Nonamelk Lake?
- Nonamelk 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 Nonamelk Lake?
- Nonamelk Lake in Seminole County, Florida has a water quality grade of B (Good). Water clarity: 3.3 ft visibility. Phosphorus: 24 µg/L.
Is Nonamelk Lake safe to swim in?
- Based on E. coli testing, Nonamelk Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 10 samples across 2 seasons. That works out to a bacteria swim-safety grade of A — a historical summary of past testing, not a current reading. Nonamelk Lake has a water quality grade of B (Good). Bacteria levels can spike quickly after heavy rain, so always check Florida's current beach and health-department advisories before you swim.
What is the water temperature of Nonamelk Lake?
- Nonamelk Lake typically sits around 86°F at the surface in August, from 41 EPA Water Quality Portal field readings (2017–2025). That is a typical value for the month, not a live reading.
Explore Nonamelk Lake across LakeQuality
Planning a trip around Canaveral?
Nonamelk Lake is about 33 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
20 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples20 samples · 2024–2025
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)