Concerns identified are for chloride, sulfates, and total dissolved solids. Possible concerns are nitrogen and phosphorus. The Devils River is a tributary to International Amistad Reservoir. There are no major population centers in the watershed. The land is used for ranching.
Concerns identified are for forms of nitrogen.
Total dissolved solids are identified as a possible concern. Flow to this segment is regulated by releases from International Falcon Reservoir. The region ranges from arid in the upper portion of the segment, which is mainly dense brush rangeland with some dry land crops, to semitropical in the lower portion with extensive irrigated lands. Possible concerns are nitrogen and phosphorus. Due to elevated levels of fecal coliform bacteria, contact recreation use is not supported.