Ll Harris Sw Sh Lake
Lake County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Ll Harris Sw Sh Lake. Here is what has been measured.
- Eutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- Public access
- Limited data
Ll Harris Sw Sh Lake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.6 ft visibility. Phosphorus: 18 µg/L.
Ll Harris Sw Sh Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water clarity is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 127 other monitored lakes in Lake County, Ll Harris Sw Sh Lake ranks #77 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-08-26. Methodology: how these readings are compared.
What Ll Harris Sw Sh Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyRecreation use not supported
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, Ll Harris Sw Sh Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 10 samples across 3 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 Ll Harris Sw Sh 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 Ll Harris Sw Sh Lake
These are the measurements Florida DEP publishes for Ll Harris Sw Sh 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 2.6 ft of visibility. Phosphorus 18 µg/L. TSI 55.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 18µg/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. | 55 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Ll Harris Sw Sh Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Ll Harris Sw Sh Lake typically sits around 73°F at the surface in October. Summer average is about 84°F. Usually warmest in Jul (about 86°F) and coldest in Jan (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 (86°F).
Typical surface water temperature by month, from 97 field readings (2010–2024) via the EPA Water Quality Portal. See the full Ll Harris Sw Sh Lake water temperature breakdown →
Recreation & Access
- Howey Boat Ramp / Griffin Waterfront ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Ll Harris Sw Sh Lake
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Fishing Ll Harris Sw Sh Lake
Water quality readings over time
3 seasons of samples on record (2021–2024). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving3 years
Phosphorus
Worsening+0.73 µg/L/yr3 years
EPA Impairment Status
Ll Harris Sw Sh Lake 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, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2838B · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Ll Harris Sw Sh Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Silver Springs Citrus/SprayfieldsHowey In The Hills · 0.6 mi away · NPDES FL0175412Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Lake County
Frequently asked questions about Ll Harris Sw Sh Lake
Where is Ll Harris Sw Sh Lake?
- Ll Harris Sw Sh 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 Ll Harris Sw Sh Lake?
- Ll Harris Sw Sh Lake in Lake County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.6 ft visibility. Phosphorus: 18 µg/L.
Is Ll Harris Sw Sh Lake safe to swim in?
- Based on E. coli testing, Ll Harris Sw Sh Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 10 samples across 3 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 Ll Harris Sw Sh 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 Ll Harris Sw Sh Lake?
- Ll Harris Sw Sh Lake typically sits around 73°F at the surface in October, from 97 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
Are there boat ramps on Ll Harris Sw Sh Lake?
- Ll Harris Sw Sh Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Howey Boat Ramp / Griffin Waterfront Park. Public access is listed as yes.
Can I fish at Ll Harris Sw Sh Lake?
- Ll Harris Sw Sh 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 Ll Harris Sw Sh Lake across LakeQuality
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Where this data comes from
13 measurements from 1 monitoring station, 2021–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples13 samples · 2021–2024
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Named boat-access points from the USGS National Boat Ramps inventory