Flagler-Emerald Lake
Flagler-Emerald Lake in Flagler County, Florida has a water quality grade of C (Fair). Water clarity: 1.8 ft visibility. Phosphorus: 57 µg/L.
- Clarity
- 1.8 ft
- Type
- Eutrophic
- Trend
- ↓ Declining
- Public access
- Yes
Next lake in Flagler County
Swipe left or right on this bar to open the next or previous lake.
Flagler-Emerald Lake is a productive, nutrient-rich eutrophic lake in Flagler County, Florida. Water quality is graded C based on 1 sampling years through 2023. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 8 other monitored lakes in Flagler County, Flagler-Emerald Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-03-17. Grade methodology: LakeQuality methodology.
Watch Flagler-Emerald Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyModerate
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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Very murky, less than 1.8 ft of visibility. Phosphorus level: 57 µg/L. Trophic State Index: 66.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.8 ft | Not graded |
| Phosphorus | 57 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Flagler-Emerald Lake
Compare lakeside cabins, hotels, and vacation rentals near Flagler-Emerald 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.
Top-rated places to stay near Flagler-Emerald 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 →
Recreation & Access
- Moody Public Boat LaunchPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Flagler-Emerald Lake
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.4 m/yr | 3 |
| Phosphorus | → Stable | -0.5 µg/L/yr | 3 |
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Flagler-Emerald Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Flagler Beach WwtfFlagler Beach · 3 mi away · NPDES FL0026611MajorRecent violation
- Beverly Beach - Ocean City UtiBeverly Beach · 0.7 mi away · NPDES FL0039756
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
County Ranking
Ranked #4 of 9 lakes in Flagler County
Nearby Lakes in Flagler County
Frequently asked questions about Flagler-Emerald Lake
Where is Flagler-Emerald Lake?
- Flagler-Emerald Lake is a lake in Flagler County, Florida. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Flagler-Emerald Lake?
- Flagler-Emerald Lake in Flagler County, Florida has a water quality grade of C (Fair). Water clarity: 1.8 ft visibility. Phosphorus: 57 µg/L.
Is Flagler-Emerald Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Flagler-Emerald Lake has a water quality grade of C (Fair). Always check local health department advisories before swimming.
Are there boat ramps on Flagler-Emerald Lake?
- Flagler-Emerald Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Moody Public Boat Launch. Public access is listed as yes.
Explore Flagler-Emerald Lake across LakeQuality
Planning a trip around Fort Matanzas?
Flagler-Emerald Lake is about 15 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 C Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
173 measurements from 3 monitoring stations, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX173 samples · 2020–2023
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Named boat-access points from the USGS National Boat Ramps inventory