Tank Lake
Hernando County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Tank Lake. Here is what has been measured.
- Impaired · Oxygen depletion (low DO)
- Limited data
Tank Lake in Hernando County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 5.1 ft visibility. Phosphorus: 18 µg/L.
Tank Lake is a lake in Hernando County, Florida. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-06-28. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Tank Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
Whether Tank 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 Tank Lake
These are the measurements Florida DEP publishes for Tank Lake, 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 5.1 ft. Phosphorus 18 µg/L. TSI 50.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 18µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| 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. | 50 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Tank Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Tank Lake typically sits around 78°F at the surface in October. Summer average is about 88°F. Usually warmest in Aug (about 89°F) and coldest in Feb (about 60°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (60°F) to its warmest (89°F).
Typical surface water temperature by month, from 51 field readings (2010–2021) via the EPA Water Quality Portal. See the full Tank Lake water temperature breakdown →
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Stays near Tank Lake
Compare lakeside cabins, hotels, and vacation rentals near Tank Lake in Hernando 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 Tank Lake
Water quality readings over time
2 seasons of samples on record (2020–2021). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening2 years
Phosphorus
Worsening+2 µg/L/yr2 years
EPA Impairment Status
Tank Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit FL1329L · Official waterbody report
Nearby Lakes in Hernando County
Frequently asked questions about Tank Lake
Where is Tank Lake?
- Tank Lake is a lake in Hernando County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Tank Lake?
- Tank Lake in Hernando County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 5.1 ft visibility. Phosphorus: 18 µg/L.
Is Tank Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Tank Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
What is the water temperature of Tank Lake?
- Tank Lake typically sits around 78°F at the surface in October, from 51 EPA Water Quality Portal field readings (2010–2021). That is a typical value for the month, not a live reading.
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Where this data comes from
4 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples4 samples · 2020–2021
Monitoring station identifiers (1)
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