Water-quality data for the Eagle River valley in the vicinity of Eagle and Vail, West-central Colorado

Water-quality data were collected by the U.S. Geological Survey in the Eagle River valley, Colo., during 1976. Forty-nine ground-water samples from wells and springs were collected and analyzed during the study. Eight surface-water samples were analyzed. All the water samples were analyzed for major cations and anions, selenium, and arsenic. Seven of the surface-water samples also were analyzed for trace elements. The potability of ground and surface waters in the Eagle River valley can be determined by comparing the chemical data in tables with the recommended drinking-water-quality standards of the U.S. Public Health Service (1962) presented at the top of the tables. Most of the analyses indicate that only a few chemical constituents (dissolved solids, iron, manganese, and sulfate) occur in excess of these standards. The occurrence of selenium in excess of the recommended limits was detected in two samples. (Woodard-USGS)