Dtl Lake
Dtl Lake in Clay County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2 ft visibility. Phosphorus: 75.2 µg/L.
- Clarity
- 2 ft
- Typical in August
- 87°F
- Type
- Eutrophic
- Trend
- → Stable
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Dtl Lake →
Next lake in Clay County
Swipe left or right on this bar to open the next or previous lake.
Dtl Lake is a productive, nutrient-rich eutrophic lake in Clay County, Florida. Water quality is graded D based on 1 sampling years through 2025. Water clarity is improving over recent sampling years. Compared to the 16 other monitored lakes in Clay County, Dtl Lake ranks #11 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-02-10. Grade methodology: LakeQuality methodology.
Watch Dtl Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyElevated nutrients
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: 75.2 µg/L. Trophic State Index: 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | Not graded |
| Phosphorus | 75.2 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 67 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Dtl Lake
Compare lakeside cabins, hotels, and vacation rentals near Dtl Lake in Clay 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 Dtl Lake are listed below.
Top-rated places to stay near Dtl 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 whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Dtl Lake typically sits around 87°F at the surface in August. Summer average is about 86°F. Usually warmest in Jul (about 87°F) and coldest in Jan (about 56°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 748 field readings (2010–2025) via the EPA Water Quality Portal. See the full Dtl Lake water temperature breakdown →
Fishing Dtl Lake
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.019 m/yr | 6 |
| Phosphorus | ↓ Declining | +4.37 µg/L/yr | 6 |
EPA Impairment Status
Dtl 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 FL2389 · Official waterbody report · Matched by proximity (1.14 km)
County Ranking
Ranked #11 of 17 lakes in Clay County
Nearby Lakes in Clay County
Frequently asked questions about Dtl Lake
Where is Dtl Lake?
- Dtl Lake is a lake in Clay County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Dtl Lake?
- Dtl Lake in Clay County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2 ft visibility. Phosphorus: 75.2 µg/L.
Is Dtl 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. Dtl Lake has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
What is the water temperature of Dtl Lake?
- Dtl Lake typically sits around 87°F at the surface in August, from 748 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Dtl Lake across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
533 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_WQX533 samples · 2020–2025
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