Flagler-Disston Lake
Flagler-Disston Lake in Flagler County, Florida has a water quality grade of B (Good). Water clarity: 1.5 ft visibility. Phosphorus: 27 µg/L.
- Clarity
- 1.5 ft
- Type
- Eutrophic
- Trend
- ↑ Improving
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Flagler-Disston Lake is a productive, nutrient-rich eutrophic lake in Flagler County, Florida. Water quality is graded B based on 1 sampling years through 2024. Overall water quality is improving over recent sampling years. Compared to the 8 other monitored lakes in Flagler County, Flagler-Disston Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-12-28. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLow algae
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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Very murky, less than 1.5 ft of visibility. Phosphorus level: 27 µg/L. Trophic State Index: 61.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 ft | Not graded |
| Phosphorus | 27 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Flagler-Disston Lake
Compare lakeside cabins, hotels, and vacation rentals near Flagler-Disston 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.
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Fishing Flagler-Disston Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.115 m/yr | 5 |
| Phosphorus | → Stable | +0.41 µg/L/yr | 5 |
EPA Impairment Status
Flagler-Disston Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2630B · Official waterbody report · Matched by proximity (0.2 km)
County Ranking
Ranked #1 of 9 lakes in Flagler County
Nearby Lakes in Flagler County
Frequently asked questions about Flagler-Disston Lake
Where is Flagler-Disston Lake?
- Flagler-Disston Lake is a lake in Flagler County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Flagler-Disston Lake?
- Flagler-Disston Lake in Flagler County, Florida has a water quality grade of B (Good). Water clarity: 1.5 ft visibility. Phosphorus: 27 µg/L.
Is Flagler-Disston Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Flagler-Disston Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
Explore Flagler-Disston Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
134 measurements from 3 monitoring stations, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX134 samples · 2020–2024
Monitoring station identifiers (3)
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