Sam Rayburn Reserv Lake is a productive, nutrient-rich eutrophic lake in Nacogdoches County, Texas. Water quality is graded C based on 2 sampling years through 2026. Compared to the 1 other monitored lakes in Nacogdoches County, Sam Rayburn Reserv Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2026-01-20. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Very murky, less than 0.7 ft of visibility. Phosphorus level: 160 µg/L. Chlorophyll-a: 5.9 µg/L. Trophic State Index: 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.7 ft | F |
| Phosphorus | 160 µg/L | F |
| Chlorophyll-a (Algae) | 5.9 µg/L | B |
| Trophic State Index (TSI) | 69 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Sam Rayburn Reserv Lake
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Fishing Sam Rayburn Reserv Lake
Location
County Ranking
Ranked #1 of 2 lakes in Nacogdoches County
Cleaner Lakes Within 30 Miles
Sam Rayburn Reserv Lake holds Grade C. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Nacogdoches County
Explore Sam Rayburn Reserv Lake across LakeGrade
More Texas Lake Rankings
Other Grade C 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: 2026-01-20
Monitoring stations: 1