Whistlercn Lake
Whistlercn Lake in Polk County, Florida has a water quality grade of B (Good). Water clarity: 2 ft visibility. Phosphorus: 15 µg/L. Surface area: 764 acres.
- Clarity
- 2 ft
- Typical in August
- 86°F
- Area
- 764 acres
- Type
- Eutrophic
- Trend
- → Stable
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Whistlercn Lake is a 764-acre productive, nutrient-rich eutrophic lake in Polk County, Florida. Water quality is graded B based on 1 sampling years through 2025. Water clarity is declining over recent sampling years. Compared to the 176 other monitored lakes in Polk County, Whistlercn Lake ranks #91 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-06-16. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLimited data
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.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Very murky, less than 2 ft of visibility. Phosphorus level: 15 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | Not graded |
| Phosphorus | 15 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 Whistlercn Lake
Compare lakeside cabins, hotels, and vacation rentals near Whistlercn Lake in Polk 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 Whistlercn Lake
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Water Temperature
Whistlercn Lake typically sits around 86°F at the surface in August. Summer average is about 87°F. Usually warmest in Jul (about 88°F) and coldest in Jan (about 60°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 55 field readings (2021–2025) via the EPA Water Quality Portal. See the full Whistlercn Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 764 acres |
No bathymetric survey has been published for Whistlercn Lake, so its depth is not documented here.
Fishing Whistlercn Lake
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.609 m/yr | 6 |
| Phosphorus | ↑ Improving | -0.49 µg/L/yr | 6 |
Reservoir Info (USACE NID)
Whistlercn Lake is a man-made reservoir impounded by the Structure P-3 (completed 1965), built primarily for flood risk reduction on the P-3 Canal; concrete-type dam, 18 ft tall.
- Surface area
- 764 ac
- Normal storage
- 6,112 ac-ft
- Max storage
- 11,460 ac-ft
- Drainage area
- 3.7 sq mi
- Hazard class
- High
- Owner
- SWFWMD
Source: USACE National Inventory of Dams, NID ID FL12011 · Operator website · Matched by proximity (0.31 km)
EPA Impairment Status
Whistlercn 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 FL1501B · Official waterbody report · Matched by proximity (1.57 km)
County Ranking
Ranked #91 of 177 lakes in Polk County
Nearby Lakes in Polk County
Frequently asked questions about Whistlercn Lake
Where is Whistlercn Lake?
- Whistlercn Lake is a lake in Polk County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Whistlercn Lake?
- Whistlercn Lake in Polk County, Florida has a water quality grade of B (Good). Water clarity: 2 ft visibility. Phosphorus: 15 µg/L. Surface area: 764 acres.
Is Whistlercn Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Whistlercn Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Whistlercn Lake?
- Whistlercn Lake typically sits around 86°F at the surface in August, from 55 EPA Water Quality Portal field readings (2021–2025). That is a typical value for the month, not a live reading.
Explore Whistlercn Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
44 measurements from 1 monitoring station, 2021–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples44 samples · 2021–2025
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