Lake Powell Bay County Line
Walton County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Lake Powell Bay County Line. Here is what has been measured.
- Mesotrophic
Lake Powell Bay County Line in Walton County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.5 ft visibility. Phosphorus: 14 µg/L.
Lake Powell Bay County Line is a mesotrophic lake in Walton County, Florida. Overall water quality is improving over recent sampling years. Compared to the 83 other monitored lakes in Walton County, Lake Powell Bay County Line ranks #24 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-02-12. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLow algae
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.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake Powell Bay County Line 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 Powell Bay County Line
These are the measurements Florida DEP publishes for Lake Powell Bay County Line, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.5 ft. Phosphorus 14 µg/L. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 14µg/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. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lake Powell Bay County Line
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lake Powell Bay County Line typically sits around 77°F at the surface in October. Summer average is about 86°F. Usually warmest in Aug (about 88°F) and coldest in Jan (about 59°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (59°F) to its warmest (88°F).
Typical surface water temperature by month, from 327 field readings (2010–2025) via the EPA Water Quality Portal. See the full Lake Powell Bay County Line water temperature breakdown →
Stays via Stay22
Stays near Lake Powell Bay County Line
Compare lakeside cabins, hotels, and vacation rentals near Lake Powell Bay County Line in Walton 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 Powell Bay County Line
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Fishing Lake Powell Bay County Line
Water Quality Trend: Improving
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Stable+0.05 µg/L/yr5 years
Nearby Lakes in Walton County
Frequently asked questions about Lake Powell Bay County Line
Where is Lake Powell Bay County Line?
- Lake Powell Bay County Line is a lake in Walton 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 Powell Bay County Line?
- Lake Powell Bay County Line in Walton County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.5 ft visibility. Phosphorus: 14 µg/L.
Is Lake Powell Bay County Line safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Lake Powell Bay County Line?
- Lake Powell Bay County Line typically sits around 77°F at the surface in October, from 327 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Lake Powell Bay County Line across LakeQuality
More lakes in Florida
Other Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
108 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- CHOCTAWHATCHEE BASIN ALLIANCE
21FLCBA_WQX108 samples · 2020–2025
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.