Lake Henry
Lake Henry in Highlands County, Florida has a water quality grade of B (Good). Water clarity: 3.6 ft visibility. Phosphorus: 16 µg/L.
- Clarity
- 3.6 ft
- Typical in August
- 88°F
- Max depth
- ~48 ft est.
- Type
- Eutrophic
- Trend
- ↓ Declining
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Lake Henry is a productive, nutrient-rich eutrophic lake in Highlands County, Florida with an estimated average depth of about 48 feet. Water quality is graded B based on 1 sampling years through 2024. Overall water quality is declining over recent sampling years. Compared to the 72 other monitored lakes in Highlands County, Lake Henry ranks #53 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-11-12. 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 3.6 ft. Phosphorus level: 16 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.6 ft | Not graded |
| Phosphorus | 16 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Henry
Compare lakeside cabins, hotels, and vacation rentals near Lake Henry 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 Henry
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Water Temperature
Lake Henry typically sits around 88°F at the surface in August. Summer average is about 88°F. Usually warmest in Aug (about 88°F) and coldest in Feb (about 68°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 63 field readings (2010–2024) via the EPA Water Quality Portal. See the full Lake Henry water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~48 ft est. |
| Average Depth | ~8 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Florida has not published bathymetry for Lake Henry.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Lake Henry
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.15 m/yr | 5 |
| Phosphorus | → Stable | 0 µg/L/yr | 5 |
EPA Impairment Status
Lake Henry 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 FL1938 · Official waterbody report
County Ranking
Ranked #53 of 73 lakes in Highlands County
Nearby Lakes in Highlands County
Frequently asked questions about Lake Henry
Where is Lake Henry?
- Lake Henry 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 Henry?
- Lake Henry in Highlands County, Florida has a water quality grade of B (Good). Water clarity: 3.6 ft visibility. Phosphorus: 16 µg/L.
Is Lake Henry safe to swim in?
- Good for swimming, clear water with low algae levels. Lake Henry has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Lake Henry?
- Lake Henry typically sits around 88°F at the surface in August, from 63 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is Lake Henry?
- No published bathymetric survey covers Lake Henry, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 48 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Lake Henry across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
22 measurements from 1 monitoring station, 2023–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples22 samples · 2023–2024
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
Lake size & watershed from HydroLAKES (HydroSHEDS)