Hernando-Bystre Lake
Hernando County, FloridaView mapDirections
No nutrient or algae sampling on record from Florida DEP for this lake.
- Impaired · Algal growth
- Limited data
Hernando-Bystre Lake in Hernando County, Florida has water-quality measurements published by Florida DEP, shown here as reported.
Hernando-Bystre 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 2020-10-02. Methodology: how these readings are compared.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Hernando-Bystre Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Hernando-Bystre 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 Hernando-Bystre Lake
These are the measurements Florida DEP publishes for Hernando-Bystre Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Hernando-Bystre Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Hernando-Bystre Lake typically sits around 80°F at the surface in October. Summer average is about 83°F. Usually warmest in Jun (about 83°F) and coldest in Dec (about 65°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (65°F) to its warmest (83°F).
Typical surface water temperature by month, from 16 field readings (2014–2016) via the EPA Water Quality Portal. See the full Hernando-Bystre Lake water temperature breakdown →
Stays via Stay22
Stays near Hernando-Bystre Lake
Compare lakeside cabins, hotels, and vacation rentals near Hernando-Bystre 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 Hernando-Bystre 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+297 µg/L/yr2 years
EPA Impairment Status
Hernando-Bystre 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, Fish consumption, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL1329W · Official waterbody report
Nearby Lakes in Hernando County
Frequently asked questions about Hernando-Bystre Lake
Where is Hernando-Bystre Lake?
- Hernando-Bystre 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 Hernando-Bystre Lake?
- Hernando-Bystre Lake in Hernando County, Florida has water-quality measurements published by Florida DEP, shown here as reported.
Is Hernando-Bystre Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Hernando-Bystre Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
What is the water temperature of Hernando-Bystre Lake?
- Hernando-Bystre Lake typically sits around 80°F at the surface in October, from 16 EPA Water Quality Portal field readings (2014–2016). That is a typical value for the month, not a live reading.
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Where this data comes from
30 measurements from 3 monitoring stations, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX30 samples · 2020
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
Impairment status from EPA ATTAINS 303(d) database