Ll Harris Sw Sh Lake
Ll Harris Sw Sh Lake in Lake County, Florida has a water quality grade of B (Good). Water clarity: 2.6 ft visibility. Phosphorus: 18 µg/L.
- Clarity
- 2.6 ft
- Typical in August
- 83°F
- Type
- Eutrophic
- Trend
- → Stable
- Public access
- Yes
Next lake in Lake County
Swipe left or right on this bar to open the next or previous lake.
Ll Harris Sw Sh Lake is a productive, nutrient-rich eutrophic lake in Lake County, Florida. Water quality is graded B based on 1 sampling years through 2024. 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. Grade methodology: LakeQuality methodology.
Watch Ll Harris Sw Sh Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyBacteria A
Based on clarity and algae grades from past sampling — we do not hold 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.
Water Quality Grade: B (Good)
Very murky, less than 2.6 ft of visibility. Phosphorus level: 18 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.6 ft | Not graded |
| Phosphorus | 18 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Ll Harris Sw Sh Lake
Compare lakeside cabins, hotels, and vacation rentals near Ll Harris Sw Sh 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.
Top-rated places to stay near Ll Harris Sw Sh Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip? Cabins and lodging at Ll Harris Sw Sh Lake → · more Florida lake trips
Water Temperature
Ll Harris Sw Sh Lake typically sits around 83°F at the surface in August. 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.
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
Fishing Ll Harris Sw Sh Lake
Water Quality Trend: → Stable
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.443 m/yr | 3 |
| Phosphorus | ↓ Declining | +0.73 µg/L/yr | 3 |
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
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2838B · Official waterbody report · Matched by proximity (1.46 km)
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.
County Ranking
Ranked #77 of 128 lakes in Lake County
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. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Ll Harris Sw Sh Lake?
- Ll Harris Sw Sh Lake in Lake County, Florida has a water quality grade of B (Good). 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 works out to a bacteria swim-safety grade of A — a historical summary of past testing, not a current reading. Ll Harris Sw Sh Lake has a water quality grade of B (Good). Bacteria levels can spike quickly after heavy rain, so always check Florida's current beach and health-department advisories before you swim.
What is the water temperature of Ll Harris Sw Sh Lake?
- Ll Harris Sw Sh Lake typically sits around 83°F at the surface in August, 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.
Explore Ll Harris Sw Sh Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated 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