Dead Lake
Dead Lake in Flagler County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 1.6 ft visibility. Phosphorus: 240 µg/L.
- Clarity
- 1.6 ft
- Typical in August
- 88°F
- Type
- Hypereutrophic
- Trend
- → Stable
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Dead Lake →
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Dead Lake is a highly nutrient-loaded hypereutrophic lake in Flagler County, Florida. Water quality is graded D based on 1 sampling years through 2025. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 8 other monitored lakes in Flagler County, Dead Lake ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-08-06. 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 1.6 ft of visibility. Phosphorus level: 240 µg/L. Trophic State Index: 77.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | Not graded |
| Phosphorus | 240 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 77 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Dead Lake
Compare lakeside cabins, hotels, and vacation rentals near Dead Lake in Flagler 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 Dead Lake are listed below.
Top-rated places to stay near Dead Lake
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 trip? Cabins and lodging at Dead Lake → · more Florida lake trips
Water Temperature
Dead Lake typically sits around 88°F at the surface in August. Summer average is about 87°F. Usually warmest in Aug (about 88°F) and coldest in Jul (about 85°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 18 field readings (2025–2025) via the EPA Water Quality Portal. See the full Dead Lake water temperature breakdown →
Recreation & Access
- Bull Creek Campround & Public Boat RampPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Dead Lake
Water Quality Trend: → Stable
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | 0 m/yr | 2 |
| Phosphorus | → Stable | +2 µg/L/yr | 2 |
EPA Impairment Status
Dead Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2615A · Official waterbody report
County Ranking
Ranked #9 of 9 lakes in Flagler County
Nearby Lakes in Flagler County
Frequently asked questions about Dead Lake
Where is Dead Lake?
- Dead Lake is a lake in Flagler County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Dead Lake?
- Dead Lake in Flagler County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 1.6 ft visibility. Phosphorus: 240 µg/L.
Is Dead 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. Dead Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
What is the water temperature of Dead Lake?
- Dead Lake typically sits around 88°F at the surface in August, from 18 EPA Water Quality Portal field readings (2025–2025). That is a typical value for the month, not a live reading.
Are there boat ramps on Dead Lake?
- Dead Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Bull Creek Campround & Public Boat Ramp. Public access is listed as yes.
Explore Dead Lake across LakeQuality
Planning a trip around Fort Matanzas?
Dead Lake is about 24 miles from Fort Matanzas National Monument. 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 Fort Matanzas →More Florida Lake Rankings
Other Grade D Lakes in Florida
Hypereutrophic Lakes in Florida
Where this data comes from
17 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FL Dept. of Environmental Protection, Northeast District
21FLA_WQX17 samples · 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
Named boat-access points from the USGS National Boat Ramps inventory