Nonamelk Lake
Seminole County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Nonamelk Lake. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
- Limited data
Nonamelk Lake in Seminole County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 3.3 ft visibility. Phosphorus: 24 µg/L.
Nonamelk Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. 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. Methodology: how these readings are compared.
Swimming conditions
Readings onlyRecreation use not supported
Based on clarity and algae readings from past sampling — there is no 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.
Whether Nonamelk Lake is safe to swim in today is a call for the Florida Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Nonamelk Lake
These are the measurements Florida DEP publishes for Nonamelk Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 3.3 ft of visibility. Phosphorus 24 µg/L. TSI 55.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 24µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 55 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Nonamelk Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Nonamelk Lake typically sits around 81°F at the surface in October. 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.
Column height runs from this lake’s coldest month (62°F) to its warmest (87°F).
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 →
Stays via Stay22
Stays 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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Fishing Nonamelk Lake
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Improving-2.17 µg/L/yr6 years
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
Designated uses not supporting: Aquatic life, Recreation.
Source: EPA ATTAINS assessment unit FL2999B · Official waterbody report
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.
Nearby Lakes in Seminole County
Frequently asked questions about Nonamelk Lake
Where is Nonamelk Lake?
- Nonamelk Lake is a lake in Seminole County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Nonamelk Lake?
- Nonamelk Lake in Seminole County, Florida has water-quality measurements published by Florida DEP, shown here as reported. 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 is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Nonamelk Lake is safe to swim in today is a call for Florida's water agency and the county health department; check their current beach advisories before you swim.
What is the water temperature of Nonamelk Lake?
- Nonamelk Lake typically sits around 81°F at the surface in October, 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 lakes in Florida
Other 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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)