Ray Roberts Lake Site is a productive, nutrient-rich eutrophic lake in Denton County, Texas. Water quality is graded B based on 2 sampling years through 2025. Compared to the 5 other monitored lakes in Denton County, Ray Roberts Lake Site ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2025-12-17. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 3.9 ft. Phosphorus level: 20.1 µg/L. Chlorophyll-a: 15.6 µg/L. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 ft | D |
| Phosphorus | 20.1 µg/L | B |
| Chlorophyll-a (Algae) | 15.6 µg/L | C |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Ray Roberts Lake Site
Location
County Ranking
Ranked #1 of 6 lakes in Denton County
Nearby Lakes in Denton County
Explore Ray Roberts Lake Site across LakeGrade
More Texas Lake Rankings
Other Grade B 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: 2025-12-17
Monitoring stations: 3