Rockwall County Lake Quality
Texas, 2 lakes, average grade D (Poor)
Rockwall County has 2 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. On average, Rockwall County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Lake Ray Hubbard (D) is the cleanest in the county.
Quick Answers for Rockwall County
Planning a trip? Check special fishing regulations for Lake Ray Hubbard — or check the official Texas fishing regulations.
All Lakes in Rockwall County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Lake Ray Hubbard | D | 2 ft | 64 µg/L |
| 2 | Phelps Lake | D | 0.6 ft | 180 µg/L |
Other Counties in Texas
See how Rockwall County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 17 states.
Where to stay near Rockwall County
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Source: EPA National Aquatic Resource Surveys, 2026.