Filters: partyWithName: U.S. Geological Survey (X) > Types: Downloadable (X) > partyWithName: Kenneth Belitz (X) > Extensions: Shapefile (X) > Types: Shapefile (X)

Filters Date Range Past year (2) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (3) OGC WFS Layer (3) OGC WMS Layer (3) Contacts Tyler D Johnson Tyler D Johnson U.S. Geological Survey - ScienceBase John T Wilson California Water Science Center More... Categories Data (3) Data Release - Under Revision (1) Tag Types Theme (3) Place (3) Harvest Set (1) Tag Schemes USGS Thesaurus (3) Common geographic areas (3) None (1) ISO 19115 Topic Category (2) View Results as: JSON ATOM CSV

California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project Study Areas and grid cells for assessment of groundwater resources used for public drinking-water supply The California Groundwater Ambient Monitoring and Assessment Program (GAMA) is a statewide, comprehensive assessment of groundwater quality designed to help better understand and identify risks to groundwater resources. GAMA is being implemented by the California State Water Resources Control Board. The USGS is the technical lead for the Priority Basin Project (PBP), one of the components of the GAMA Program. The initial focus of the GAMA Priority Basin Project in 2004 to 2012 was on assessment of water-quality in groundwater resources used for public drinking water supply (Belitz and others, 2003; 2015). Groundwater basins and sub-basins (472 in total) were prioritized based upon a number of factors (Belitz and... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, GAMA, Groundwater, Priority Basin Project, Public supply, All tags... USGS Science Data Catalog (SDC), United States, drinking water, water-quality, Fewer tags Public Supply Groundwater Fraction per County, 2015 This dataset provides the calculated proportion of people using publicly supplied groundwater (PSGF) for each county in the conterminous U.S. The county boundaries and the PSGF represent the year 2015. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: United States, drinking water use, geoscientificInformation, groundwater, public supply water use Community public supply based Hydrogeologic Mapping Units A seamless map of the major groundwater areas used by community public supply wells in the United States was needed in order to describe and compute the number of equivalent people using public supply water. This goal was met by the delineation of hydrogeologic mapping units (HMUs). An HMU is a mapped polygon, within which, all public supply wells have a common source of water. The source of water can be either a national Principal Aquifer (PA) as defined in USGS (2003) or a Secondary Hydrogeologic Region (SHR) as defined in Belitz et al. (2018). Collectively, both PAs and SHRs are referred to as Hydrogeologic Regions (HRs). The common source of water can be a single HR or multiple HRs, as HRs can overlap one another.... Categories: Data, Data Release - Under Revision; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: United States, geoscientificInformation, groundwater, hydrogeology