USGS Water-Quality Information
NoteworthyFeatured Local Science: California Water Science Center - Pesticides flowing into the Salton Sea USGS investigations of national and regional trends in ground-water quality [30KB PDF] Water Quality DataNational Water Information System (NWIS)
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USGS Water-Quality Information PagesThe U.S. Geological Survey provides scientific and technical expertise, leadership, and coordination in addressing issues concerning the quality of the Nation's water resources. Our scientists:
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