Lake Isabell Sw
Polk County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Lake Isabell Sw. Here is what has been measured.
- Impaired · pH / acidity
- Limited data
Lake Isabell Sw in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 21 µg/L.
Lake Isabell Sw is a lake in Polk County, Florida. Overall water quality is improving over recent sampling years. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2020-09-10. Methodology: how these readings are compared.
What Lake Isabell Sw is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Lake Isabell Sw is listed impaired under Clean Water Act §303(d) (IR 4C) for pH / acidity. Check local advisories before you swim.
Whether Lake Isabell Sw 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 Lake Isabell Sw
These are the measurements Florida DEP publishes for Lake Isabell Sw, 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 ft of visibility. Phosphorus 21 µg/L. TSI 58.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 21µg/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. | 58 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake Isabell Sw
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lake Isabell Sw typically sits around 84°F at the surface in June. Summer average is about 84°F. Usually warmest in Jun (about 84°F) and coldest in Feb (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 (84°F).
Typical surface water temperature by month, from 24 field readings (2016–2020) via the EPA Water Quality Portal. See the full Lake Isabell Sw water temperature breakdown →
Recreation & Access
- Lake IsabellSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Lake Isabell Sw
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Fishing Lake Isabell Sw
Water Quality Trend: Improving
Based on 4 years of monitoring (2020–2023).
Water clarity
Stable4 years
Phosphorus
Improving-1.75 µg/L/yr4 years
EPA Impairment Status
Lake Isabell Sw is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4C).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit FL1758F · Official waterbody report
Nearby Lakes in Polk County
Frequently asked questions about Lake Isabell Sw
Where is Lake Isabell Sw?
- Lake Isabell Sw is a lake in Polk County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Lake Isabell Sw?
- Lake Isabell Sw in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 21 µg/L.
Is Lake Isabell Sw safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Isabell Sw is listed impaired under Clean Water Act §303(d) (IR 4C) for pH / acidity. Check local advisories before you swim.
What is the water temperature of Lake Isabell Sw?
- Lake Isabell Sw typically sits around 84°F at the surface in June, from 24 EPA Water Quality Portal field readings (2016–2020). That is a typical value for the month, not a live reading.
Are there boat ramps on Lake Isabell Sw?
- Lake Isabell Sw has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Isabell.
Can I fish at Lake Isabell Sw?
- Lake Isabell Sw 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.
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Where this data comes from
2 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples2 samples · 2020
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
Named boat-access points from the USGS National Boat Ramps inventory