Lake Annie
Highlands County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Lake Annie. Here is what has been measured.
- Mesotrophic
- Impaired · Mercury
Lake Annie in Highlands County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 5.9 ft visibility. Phosphorus: 10 µg/L.
Lake Annie is a mesotrophic lake in Highlands County, Florida. Overall water quality is declining over recent sampling years. Compared to the 72 other monitored lakes in Highlands County, Lake Annie ranks #47 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-08-20. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLow algae
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. Lake Annie is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
Whether Lake Annie 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 Lake Annie
These are the measurements Florida DEP publishes for Lake Annie, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5.9 ft. Phosphorus 10 µg/L. TSI 44.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/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. | 44 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lake Annie
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lake Annie typically sits around 73°F at the surface in September. Summer average is about 71°F. Usually warmest in Sep (about 73°F) and coldest in Feb (about 64°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (64°F) to its warmest (73°F).
Typical surface water temperature by month, from 166 field readings (2010–2024) via the EPA Water Quality Portal. See the full Lake Annie water temperature breakdown →
Stays via Stay22
Stays near Lake Annie
Compare lakeside cabins, hotels, and vacation rentals near Lake Annie 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.
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Fishing Lake Annie
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening5 years
Phosphorus
Worsening+0.6 µg/L/yr5 years
EPA Impairment Status
Lake Annie is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL1938H · Official waterbody report
Nearby Lakes in Highlands County
Frequently asked questions about Lake Annie
Where is Lake Annie?
- Lake Annie 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 Lake Annie?
- Lake Annie in Highlands County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 5.9 ft visibility. Phosphorus: 10 µg/L.
Is Lake Annie safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Annie is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
What is the water temperature of Lake Annie?
- Lake Annie typically sits around 73°F at the surface in September, from 166 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
Explore Lake Annie across LakeQuality
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Where this data comes from
52 measurements from 2 monitoring stations, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples50 samples · 2020–2024
- Submitting organization not recorded for these samples2 samples · 2022
Monitoring station identifiers (2)
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
Impairment status from EPA ATTAINS 303(d) database