Lake Powell Middle
Lake Powell Middle in Walton County, Florida has a water quality grade of B (Good). Water clarity: 4.5 ft visibility. Phosphorus: 16 µg/L.
- Clarity
- 4.5 ft
- Typical in August
- 88°F
- Type
- Mesotrophic
- Trend
- ↑ Improving
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Lake Powell Middle is a mesotrophic lake in Walton County, Florida. Water quality is graded B based on 1 sampling years through 2025. Overall water quality is improving over recent sampling years. Compared to the 83 other monitored lakes in Walton County, Lake Powell Middle ranks #34 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-02-12. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLow algae
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 4.5 ft. Phosphorus level: 16 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.5 ft | Not graded |
| Phosphorus | 16 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Powell Middle
Compare lakeside cabins, hotels, and vacation rentals near Lake Powell Middle 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 Middle
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Lake Powell Middle typically sits around 88°F at the surface in August. Summer average is about 87°F. Usually warmest in Aug (about 88°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 323 field readings (2010–2025) via the EPA Water Quality Portal. See the full Lake Powell Middle water temperature breakdown →
Fishing Lake Powell Middle
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.185 m/yr | 5 |
| Phosphorus | → Stable | +0.1 µg/L/yr | 5 |
EPA Impairment Status
Lake Powell Middle is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL1055A · Official waterbody report · Matched by proximity (2.13 km)
County Ranking
Ranked #34 of 84 lakes in Walton County
Nearby Lakes in Walton County
Frequently asked questions about Lake Powell Middle
Where is Lake Powell Middle?
- Lake Powell Middle is a lake in Walton 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 Powell Middle?
- Lake Powell Middle in Walton County, Florida has a water quality grade of B (Good). Water clarity: 4.5 ft visibility. Phosphorus: 16 µg/L.
Is Lake Powell Middle safe to swim in?
- Good for swimming, clear water with low algae levels. Lake Powell Middle has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Lake Powell Middle?
- Lake Powell Middle typically sits around 88°F at the surface in August, from 323 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Lake Powell Middle across LakeQuality
More Florida Lake Rankings
Other Grade B 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)
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