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Welcome to the California Regional Water Quality Control Board, Central Valley Region

RESOURCES

Data & Databases

California Integrated Water Quality System (CIWQS)
GeoTracker
Environmental data for regulated facilities that impact groundwater.
Groundwater Ambient Monitoring & Assessment (GAMA)
Surface Water Ambient Monitoring Program (SWAMP)
Water Quality Studies
Water Rights Information Management System (eWRIMS)

Water Quality Data from Other Sources

Water Quality in the Sacramento River Basin California, 1994-98, USGS Circular No. 1215
Water-Quality Assessment of the Sacramento River Basin, California: Water-Quality, Sediment and Tissue Chemistry, and Biological Data, 1995-1998
Water-Quality Assessment of the Sacramento River Basin, California--Water Quality of Fixed Sites, 1996-1998, USGS Water-Resources Investigations Report 00-4247
Pesticides in Surface Water Measured at Select Sites in the Sacramento River Basin, California, 1996-1998, USGS Water-Resources Investigations Report 00-4203

U.S. Geological Survey, San Joaquin & Tulare Lake Basins

Water Quality in the San Joaquin-Tulare Basins, California, 1992-95, USGS Circular No. 1159