Lake Letta
Lake Letta in Highlands County, Florida has a water quality grade of B (Good). Water clarity: 4.9 ft visibility. Phosphorus: 17 µg/L.
- Clarity
- 4.9 ft
- Typical in August
- 91°F
- Type
- Mesotrophic
- Trend
- → Stable
- Public access
- Yes
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Lake Letta is a mesotrophic lake in Highlands County, Florida. Water quality is graded B based on 1 sampling years through 2024. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 72 other monitored lakes in Highlands County, Lake Letta ranks #50 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-08-20. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLimited data
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)
Murky, only visible to about 4.9 ft. Phosphorus level: 17 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.9 ft | Not graded |
| Phosphorus | 17 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Letta
Compare lakeside cabins, hotels, and vacation rentals near Lake Letta in Highlands 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 Lake Letta
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Water Temperature
Lake Letta typically sits around 91°F at the surface in August. Summer average is about 91°F. Usually warmest in Aug (about 91°F) and coldest in Feb (about 66°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 37 field readings (2010–2024) via the EPA Water Quality Portal. See the full Lake Letta water temperature breakdown →
Recreation & Access
- Lake Letta Public Boat RampPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Letta
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.035 m/yr | 5 |
| Phosphorus | → Stable | +0.3 µg/L/yr | 5 |
EPA Impairment Status
Lake Letta 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 FL1813C · Official waterbody report
County Ranking
Ranked #50 of 73 lakes in Highlands County
Nearby Lakes in Highlands County
Frequently asked questions about Lake Letta
Where is Lake Letta?
- Lake Letta is a lake in Highlands County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Letta?
- Lake Letta in Highlands County, Florida has a water quality grade of B (Good). Water clarity: 4.9 ft visibility. Phosphorus: 17 µg/L.
Is Lake Letta safe to swim in?
- Good for swimming, clear water with low algae levels. Lake Letta has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Lake Letta?
- Lake Letta typically sits around 91°F at the surface in August, from 37 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
Are there boat ramps on Lake Letta?
- Lake Letta has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Letta Public Boat Ramp. Public access is listed as yes.
Explore Lake Letta across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
32 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples32 samples · 2020–2024
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
Named boat-access points from the USGS National Boat Ramps inventory