Ash Lake
Volusia County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Ash Lake. Here is what has been measured.
- Eutrophic
- Impaired · Impaired biota (cause unknown)
Ash Lake in Volusia County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 92.7 µg/L.
Ash Lake is a productive, nutrient-rich eutrophic lake in Volusia County, Florida. Overall water quality is declining over recent sampling years. Compared to the 29 other monitored lakes in Volusia County, Ash Lake ranks #22 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-24. Methodology: how these readings are compared.
Swimming conditions
Readings onlyElevated nutrients
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.
Nutrient and algae readings are not a swimming clearance. Ash Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), mercury. Check local advisories before you swim.
Whether Ash 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 Ash Lake
These are the measurements Florida DEP publishes for Ash 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 2 ft of visibility. Phosphorus 92.7 µg/L. TSI 68.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 92.7µg/L | Poor 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. | 68 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Ash Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Ash Lake typically sits around 77°F at the surface in October. Summer average is about 87°F. Usually warmest in Jun (about 87°F) and coldest in Jan (about 60°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (60°F) to its warmest (87°F).
Typical surface water temperature by month, from 110 field readings (2010–2025) via the EPA Water Quality Portal. See the full Ash Lake water temperature breakdown →
Stays via Stay22
Stays near Ash Lake
Compare lakeside cabins, hotels, and vacation rentals near Ash Lake in Volusia 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Ash Lake are listed below.
Top-rated places to stay near Ash Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Florida’s top lakes →
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Fishing Ash Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening5 years
Phosphorus
Worsening+3.25 µg/L/yr5 years
EPA Impairment Status
Ash 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, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2925A · Official waterbody report
Nearby Lakes in Volusia County
Frequently asked questions about Ash Lake
Where is Ash Lake?
- Ash Lake is a lake in Volusia County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Ash Lake?
- Ash Lake in Volusia County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 92.7 µg/L.
Is Ash Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Ash Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), mercury. Check local advisories before you swim.
What is the water temperature of Ash Lake?
- Ash Lake typically sits around 77°F at the surface in October, from 110 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Ash Lake across LakeQuality
Planning a trip around Canaveral?
Ash Lake is about 23 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
184 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- St. Johns River Water Management District
21FLSJWM_WQX184 samples · 2020–2025
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