Phelps Lake is a highly nutrient-loaded hypereutrophic lake in Rockwall County, Texas. Water quality is graded D based on 2 sampling years through 2020. Compared to the 1 other monitored lakes in Rockwall County, Phelps Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2020-08-20. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 0.6 ft of visibility. Phosphorus level: 180 µg/L. Chlorophyll-a: 22 µg/L. Trophic State Index: 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.6 ft | F |
| Phosphorus | 180 µg/L | F |
| Chlorophyll-a (Algae) | 22 µg/L | D |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Phelps Lake
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Fishing Phelps Lake
Location
County Ranking
Ranked #2 of 2 lakes in Rockwall County
Cleaner Lakes Within 30 Miles
Phelps Lake holds Grade D. 2 nearby lakes hold higher grades.
- CLewisville Lake SiteDenton County · 29.6 mi · Higher grade (D → C)
- DLake Ray HubbardRockwall County · 6.5 mi · Higher overall water quality score
Nearby Lakes in Rockwall County
Explore Phelps Lake across LakeGrade
More Texas Lake Rankings
Other Grade D Lakes in Texas
Hypereutrophic Lakes in Texas
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-08-20
Monitoring stations: 1