Lgna Lake
Lgna Lake in Lake County, Florida has a water quality grade of B (Good). Water clarity: 2.3 ft visibility. Phosphorus: 21.9 µg/L.
- Clarity
- 2.3 ft
- Typical in August
- 86°F
- Type
- Eutrophic
- Trend
- → Stable
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Lgna Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water quality is graded B based on 1 sampling years through 2025. Water clarity is improving over recent sampling years. Public access is available with 1 public boat landing. Compared to the 127 other monitored lakes in Lake County, Lgna Lake ranks #64 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-06-02. 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 2.3 ft of visibility. Phosphorus level: 21.9 µg/L. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Not graded |
| Phosphorus | 21.9 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lgna Lake
Compare lakeside cabins, hotels, and vacation rentals near Lgna 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 Lgna Lake
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Water Temperature
Lgna Lake typically sits around 86°F at the surface in August. Summer average is about 85°F. Usually warmest in Aug (about 86°F) and coldest in Dec (about 60°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 109 field readings (2010–2025) via the EPA Water Quality Portal. See the full Lgna Lake water temperature breakdown →
Recreation & Access
- Pine Island Fish CampSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lgna Lake
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.029 m/yr | 6 |
| Phosphorus | ↓ Declining | +1.49 µg/L/yr | 6 |
EPA Impairment Status
Lgna Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit FL2811 · Official waterbody report · Matched by proximity (2.92 km)
County Ranking
Ranked #64 of 128 lakes in Lake County
Nearby Lakes in Lake County
Frequently asked questions about Lgna Lake
Where is Lgna Lake?
- Lgna 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 Lgna Lake?
- Lgna Lake in Lake County, Florida has a water quality grade of B (Good). Water clarity: 2.3 ft visibility. Phosphorus: 21.9 µg/L.
Is Lgna Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Lgna Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Lgna Lake?
- Lgna Lake typically sits around 86°F at the surface in August, from 109 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Are there boat ramps on Lgna Lake?
- Lgna Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pine Island Fish Camp.
Explore Lgna Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
97 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_WQX97 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
Named boat-access points from the USGS National Boat Ramps inventory