Harrisssh Lake
Lake County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Harrisssh Lake. Here is what has been measured.
- Eutrophic
- Limited data
Harrisssh Lake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 3 ft visibility. Phosphorus: 82.4 µg/L.
Harrisssh Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Overall water quality is declining over recent sampling years. Compared to the 127 other monitored lakes in Lake County, Harrisssh Lake ranks #126 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-07-25. Methodology: how these readings are compared.
Swimming conditions
Readings onlyBacteria tested: low
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.
Based on E. coli testing, Harrisssh Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 14 samples across 2 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Whether Harrisssh 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 Harrisssh Lake
These are the measurements Florida DEP publishes for Harrisssh Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 3 ft of visibility. Phosphorus 82.4 µg/L. TSI 65.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 82.4µg/L | Poor 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. | 65 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Harrisssh Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Harrisssh Lake typically sits around 79°F at the surface in October. Summer average is about 83°F. Usually warmest in Jul (about 87°F) and coldest in Jan (about 57°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (57°F) to its warmest (87°F).
Typical surface water temperature by month, from 37 field readings (2014–2025) via the EPA Water Quality Portal. See the full Harrisssh Lake water temperature breakdown →
Stays via Stay22
Stays near Harrisssh Lake
Compare lakeside cabins, hotels, and vacation rentals near Harrisssh Lake in Lake 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Harrisssh Lake are listed below.
Top-rated places to stay near Harrisssh Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Planning a whole trip? See where to stay at Florida’s top lakes →
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Fishing Harrisssh Lake
Water quality readings over time
2 seasons of samples on record (2024–2025). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening2 years
Phosphorus
Worsening+20.6 µg/L/yr2 years
Nearby Lakes in Lake County
Frequently asked questions about Harrisssh Lake
Where is Harrisssh Lake?
- Harrisssh Lake is a lake in Lake County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Harrisssh Lake?
- Harrisssh Lake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 3 ft visibility. Phosphorus: 82.4 µg/L.
Is Harrisssh Lake safe to swim in?
- Based on E. coli testing, Harrisssh Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 14 samples across 2 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Harrisssh Lake is safe to swim in today is a call for Florida's water agency and the county health department; check their current beach advisories before you swim.
What is the water temperature of Harrisssh Lake?
- Harrisssh Lake typically sits around 79°F at the surface in October, from 37 EPA Water Quality Portal field readings (2014–2025). That is a typical value for the month, not a live reading.
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Where this data comes from
30 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples30 samples · 2024–2025
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.