Highlands-Lillian Lake
Highlands County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Highlands-Lillian Lake. Here is what has been measured.
- Oligotrophic
- Public access
- Limited data
Highlands-Lillian Lake in Highlands County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 13.5 ft visibility. Phosphorus: 11 µg/L.
Highlands-Lillian Lake is a cold, clear oligotrophic lake in Highlands County, Florida. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 72 other monitored lakes in Highlands County, Highlands-Lillian Lake ranks #33 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-05-21. Methodology: how these readings are compared.
What Highlands-Lillian Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13.5 ft of visibility
- Boat launch1 documented ramp
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Highlands-Lillian Lake is safe to swim in today is a call for the Florida Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Highlands-Lillian Lake
These are the measurements Florida DEP publishes for Highlands-Lillian Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 13.5 ft. Phosphorus 11 µg/L. TSI 39.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 13.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 11µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 39 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Highlands-Lillian Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Highlands-Lillian Lake typically sits around 80°F at the surface in October. Summer average is about 82°F. Usually warmest in Jul (about 85°F) and coldest in Feb (about 61°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (61°F) to its warmest (85°F).
Typical surface water temperature by month, from 20 field readings (2010–2015) via the EPA Water Quality Portal. See the full Highlands-Lillian Lake water temperature breakdown →
Recreation & Access
- Lake Damon Public Boat RampPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Highlands-Lillian Lake
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Top-rated places to stay near Highlands-Lillian Lake
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Fishing Highlands-Lillian Lake
Water Quality Trend: Improving
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Improving-0.4 µg/L/yr5 years
Nearby Lakes in Highlands County
Frequently asked questions about Highlands-Lillian Lake
Where is Highlands-Lillian Lake?
- Highlands-Lillian Lake is a lake in Highlands County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Highlands-Lillian Lake?
- Highlands-Lillian Lake in Highlands County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 13.5 ft visibility. Phosphorus: 11 µg/L.
Is Highlands-Lillian Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Highlands-Lillian Lake?
- Highlands-Lillian Lake typically sits around 80°F at the surface in October, from 20 EPA Water Quality Portal field readings (2010–2015). That is a typical value for the month, not a live reading.
Are there boat ramps on Highlands-Lillian Lake?
- Highlands-Lillian Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Damon Public Boat Ramp. Public access is listed as yes.
Can I fish at Highlands-Lillian Lake?
- Highlands-Lillian Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Florida's fish and wildlife agency, so check its current regulations before you go.
Explore Highlands-Lillian Lake across LakeQuality
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Where this data comes from
129 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX129 samples · 2020–2025
Monitoring station identifiers (3)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory