Val Verde County Lake Quality
Texas, 3 lakes, average grade B (Good)
Only 3 lakes in Val Verde County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Amistad Reservoir (B); the most-stressed is Amistad Reserv Devils R Arm Lake (C).
Quick Answers for Val Verde County
Planning a trip? Check special fishing regulations for Amistad Reservoir — or check the official Texas fishing regulations.
All Lakes in Val Verde County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Amistad Reservoir | B | 8.2 ft | 20 µg/L |
| 2 | Amistad Reserv Rio Grande Arm Lake | B | 5.2 ft | 20 µg/L |
| 3 | Amistad Reserv Devils R Arm Lake | C | 6.6 ft | 30 µg/L |
Other Counties in Texas
See how Val Verde 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 Val Verde County
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Source: EPA National Aquatic Resource Surveys, 2026.