Lake Whistler @ Dock
Lake Whistler @ Dock in Polk County, Florida has a water quality grade of B (Good). Water clarity: 4.6 ft visibility. Phosphorus: 17 µg/L. Surface area: 764 acres.
- Clarity
- 4.6 ft
- Typical in June
- 85°F
- Area
- 764 acres
- Type
- Eutrophic
- Trend
- → Stable
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Lake Whistler @ Dock is a 764-acre productive, nutrient-rich eutrophic lake in Polk County, Florida. Water quality is graded B based on 1 sampling years through 2023. Water clarity is declining over recent sampling years. Compared to the 176 other monitored lakes in Polk County, Lake Whistler @ Dock ranks #97 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-08-16. 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)
Murky, only visible to about 4.6 ft. Phosphorus level: 17 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.6 ft | Not graded |
| Phosphorus | 17 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Whistler @ Dock
Compare lakeside cabins, hotels, and vacation rentals near Lake Whistler @ Dock 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 Lake Whistler @ Dock
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Water Temperature
Lake Whistler @ Dock typically sits around 85°F at the surface in June. Summer average is about 85°F. Usually warmest in Jun (about 85°F) and coldest in Nov (about 75°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 13 field readings (2022–2023) via the EPA Water Quality Portal.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 764 acres |
No bathymetric survey has been published for Lake Whistler @ Dock, so its depth is not documented here.
Fishing Lake Whistler @ Dock
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)
Lake Whistler @ Dock 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 (0.07 km)
EPA Impairment Status
Lake Whistler @ Dock 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 (1.45 km)
County Ranking
Ranked #97 of 177 lakes in Polk County
Nearby Lakes in Polk County
Frequently asked questions about Lake Whistler @ Dock
Where is Lake Whistler @ Dock?
- Lake Whistler @ Dock 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 Lake Whistler @ Dock?
- Lake Whistler @ Dock in Polk County, Florida has a water quality grade of B (Good). Water clarity: 4.6 ft visibility. Phosphorus: 17 µg/L. Surface area: 764 acres.
Is Lake Whistler @ Dock safe to swim in?
- Good for swimming, clear water with low algae levels. Lake Whistler @ Dock has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Lake Whistler @ Dock?
- Lake Whistler @ Dock typically sits around 85°F at the surface in June, from 13 EPA Water Quality Portal field readings (2022–2023). That is a typical value for the month, not a live reading.
Explore Lake Whistler @ Dock across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
24 measurements from 1 monitoring station, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples24 samples · 2022–2023
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