Dora Lake
Dora Lake in Lake County, Florida has a water quality grade of B (Good). Water clarity: 2.3 ft visibility. Phosphorus: 18 µg/L.
- Clarity
- 2.3 ft
- Type
- Eutrophic
- Trend
- → Stable
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Dora Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water quality is graded B based on 1 sampling years through 2024. Water clarity is improving over recent sampling years. Compared to the 127 other monitored lakes in Lake County, Dora Lake ranks #98 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-09-16. 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, Dora Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 5 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 2.3 ft of visibility. Phosphorus level: 18 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Not graded |
| Phosphorus | 18 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 Dora Lake
Compare lakeside cabins, hotels, and vacation rentals near Dora Lake in Lake 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 Dora Lake
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Fishing Dora Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.046 m/yr | 5 |
| Phosphorus | ↓ Declining | +2.11 µg/L/yr | 5 |
EPA Impairment Status
Dora 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 FL2831B · Official waterbody report
County Ranking
Ranked #98 of 128 lakes in Lake County
Nearby Lakes in Lake County
Frequently asked questions about Dora Lake
Where is Dora Lake?
- Dora Lake is a lake in Lake County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Dora Lake?
- Dora Lake in Lake County, Florida has a water quality grade of B (Good). Water clarity: 2.3 ft visibility. Phosphorus: 18 µg/L.
Is Dora Lake safe to swim in?
- Based on E. coli testing, Dora Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 5 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. Dora 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.
Explore Dora Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
Species activity outlook by water temperature and season
Where to stay at Florida's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
Florida's cleanest and most-polluted lakes, ranked
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
6 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples6 samples · 2024
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