Santa Ana Basin, National Water Quality Assessment Program
Santa Ana Basin
![]() Prado Wetlands In general, the quality of surface and ground water in the Santa Ana Basin becomes progressively poorer as water moves along hydraulic flow-paths. The highest quality water is typically associated with tributaries flowing from surrounding mountains and ground water recharged by these streams. Water quality is altered by a number of factors including consumptive use, importation of water high in dissolved solids, run-off from urban and agricultural areas, and the recycling of water within the basin. ![]() Santa Ana River Beginning in 1998, and continuing for a period of three years, the Santa Ana NAWQA project intensively investigated the quality of water resources in the study unit. The largest and most important component of the intensive-study phase was an "Occurrence and Distribution Assessment". The goal of this assessment was to characterize, in a nationally consistent manner, the broad-scale geographic and seasonal variations of water-quality related to major contaminant sources and background conditions. If you have questions and comments related to the Santa Ana Basin NAWQA, contact: Robert Kent, Project Chief (rhkent@usgs.gov) or write: Robert Kent, NAWQA Project Chief U.S. Geological Survey Water Science Center 4165 Spruance Rd., Suite 200 San Diego, California 92101-0812 |