Lake Ray Hubbard is a productive, nutrient-rich eutrophic lake in Rockwall County, Texas. Water quality is graded D based on 2 sampling years through 2025. Compared to the 1 other monitored lakes in Rockwall County, Lake Ray Hubbard ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2025-12-15. 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 2 ft of visibility. Phosphorus level: 64 µg/L. Chlorophyll-a: 31.8 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | F |
| Phosphorus | 64 µg/L | D |
| Chlorophyll-a (Algae) | 31.8 µg/L | D |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Ray Hubbard
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Fishing Lake Ray Hubbard
Location
County Ranking
Ranked #1 of 2 lakes in Rockwall County
Cleaner Lakes Within 30 Miles
Lake Ray Hubbard holds Grade D. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Rockwall County
Explore Lake Ray Hubbard across LakeGrade
More Texas Lake Rankings
Other Grade D Lakes in Texas
Eutrophic 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: 2025-12-15
Monitoring stations: 20