United States Geological Survey: Programs in Utah

The U.S. Geological Survey (USGS) has been collecting hydrologic data relating to the occurrence, quantity, and quality of water resources in Utah since 1889. The USGS maintains a network of about 200 gaging stations on rivers, streams, lakes, and reservoirs in Utah and parts of Wyoming, Idaho, and Arizona and monitors about 1,100 wells throughout the State (fig. 1). Within this network, water-quality samples are collected at 15 surface-water sites and about 185 wells. Additional water-quality samples are collected throughout Utah as part of investigative studies in which the hydrology of specific areas is examined.