The services from the state Division of Water Resources (DWR) gives access to watershed and groundwater resources data throughout the state from its Hydrobase repository. Data is available to cooperating agencies, environmental researchers, and others with an interest in water supply within the state.
API methods support retrieval of water supply data by county and for groups of wells or specific wells. Results include test results for well production as well as factors influencing supply like volcanic activity and aquifer characteristics. Methods also provide summaries of the agency's transactions, well drilling permits issued, etc.