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    Water Quality Data for California

    Lead U.S. Geological Survey [USGS]
    Description The USGS collects and analyzes chemical, physical, and biological properties of water, sediment and tissue samples from across the Nation. The Water Data for the Nation discrete sample data base is a compilation of over 4.4 million historical water quality analyses in the USGS district data bases through September 2005. The discrete sample data is a large and complex set of data that has been collected by a variety of projects ranging from national programs to studies in small watersheds.
    Science topics Water temperature, Dissolved oxygen, pH, Conductivity
    Updated April 29, 2022