The investigation of ground-water conditions in the South Platte River Valley between Denver and Brighton in southwest Adams County was undertaken as a part of the water pollution study of the Denver metropolitan area currently being conducted by the South Platte River Basin Project. Ground water is used extensively in the area for public, domestic, industrial and irrigation supplies. The principal source of large ground-water supplies is the shallow valley-fill deposits which are very susceptible to contamination. The rapidly expanding urban and industrial growth of the area has resulted in continued development of water supplies from ground-water sources. The purpose of the ground-water study was to determine sources and extent of pollution in the water-bearing formations in the area. In assessing these conditions the geology and water-bearing characteristics of the aquifers were considered. (Author)