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Modern groundwater-quality, depth, and well-construction data for selected wells in the San Joaquin Valley, California, 1993-2015 Groundwater-quality data collected between 1993 and 2015 were compiled from the U.S. Geological Survey (USGS) National Water Information System (NWIS) database for 722 wells in the San Joaquin Valley (SJV). Groundwater-quality data retrieved included lab analyses of complete major ion data (calcium, magnesium, sodium, potassium, chloride, sulfate, nitrate, alkalinity, bicarbonate, carbonate, silica, and TDS) for 613 samples, and an additional 109 samples with measured values of specific conductance. Most of these wells were sampled as part of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project or the USGS National Water Quality Assessment (NAWQA) Program. In addition... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Agriculture, California, Central Valley, Environment, GAMA, All tags... Geochemistry, Geographic Information Systems (GIS), Groundwater, Hydrogeology, Hydrology, NAWQA, PHREEQC, Public Supply Water Use, San Joaquin Valley, Total Dissolved Solids (TDS), Trends, United States, Water Quality, Fewer tags Boundaries and Grid Cells of the North American, South American, and Cosumnes Study Areas for the Sacramento Metropolitan Shallow Aquifer Study Unit The U.S. Geological Survey collected groundwater samples from 49 wells used for domestic and small system drinking water supplies in Amador, Placer, Sutter, and Sacramento counties, California in 2017. The sites were sampled for the Sacramento Metropolitan (SacMetro) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells are commonly screened at shallower depths than public-supply wells. The SacMetro study unit consisted of three “study areas” corresponding to three... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Amador County, California, Environment, GAMA, Groundwater, All tags... Groundwater Ambient Monitoring and Assessment Program, Placer County, Sacramento County, Sutter County, United States, Water-Quality, environment, geoscientificInformation, Fewer tags Groundwater-Quality Data in the Mojave Basin Shallow Aquifer Study Unit, 2018: Results from the California GAMA Priority Basin Project The U.S. Geological Survey collected groundwater samples from 49 wells used for domestic and small system drinking water supplies and 10 monitoring wells in San Bernardino County, California in 2018. The wells were sampled for the Mojave Basin (MOBS) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells commonly are screened at shallower depths than public-supply wells. The MOBS study unit covered the Upper, Middle, and Lower Mojave River groundwater basins, the... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Environment, GAMA, Groundwater, Groundwater Ambient Monitoring and Assessment Program, All tags... Mojave Desert, San Bernardino County, USGS Science Data Catalog (SDC), Water Quality, Water-Quality, Western United States, Fewer tags Groundwater-Quality Data in the Yuba and Bear Watersheds Shallow Aquifer Study Unit, 2015-2016: Results from the California GAMA Priority Basin Project The U.S. Geological Survey collected groundwater samples from 71 domestic wells and 4 springs in Nevada, Yuba, Sierra, and Placer Counties, California in 2015-2016. The sites were sampled for the Yuba and Bear Watersheds Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic drinking water supply. Domestic wells commonly are screened at shallower depths than are public-supply wells. The Yuba and Bear Watersheds Shallow Aquifer Study Unit includes the hard rock systems of the eastern Sierra Nevada in the Upper Yuba and Upper Bear watersheds.... Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Environment, GAMA, Geochemistry, Groundwater, All tags... Groundwater Ambient Monitoring and Assessment Program, Nevada County, Placer County, Sierra County, USGS Science Data Catalog (SDC), United States, Water Quality, Water-Quality, Western United States, Yuba County, Fewer tags Groundwater-quality data in the Mokelumne, Cosumnes, and American River Watersheds Shallow Aquifer Study Unit, 2016-2017: Results from the California GAMA Priority Basin Project The U.S. Geological Survey collected groundwater samples from 67 wells and 1 spring used for domestic and small system drinking water supplies in Placer, El Dorado, Amador, and Calaveras Counties, California in 2016-2017. The sites were sampled for the Mokelumne, Cosumnes, and American River Watersheds (MCAW) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells commonly are screened at shallower depths than public-supply wells. The MCAW study unit covered the... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Amador County, Calaveras County, California, El Dorado County, Environment, All tags... GAMA, Groundwater, Groundwater Ambient Monitoring and Assessment Program, Placer County, USGS Science Data Catalog (SDC), United States, Water Quality, Water-Quality, environment, geoscientificInformation, Fewer tags Regions and Equal-Area Grid Cells in the San Joaquin Valley, California (Hansen and others, 2018) Northeast SJV (NESJV), Southeast SJV (SESJV), Western SJV (WSJV), and Southern SJV (SSJV). These regions were primarily defined from the California Department of Water Resources SJV groundwater subbasins (CDWR, 2003); minor modifications were made to the CDWR defined subbasin boundaries to optimize separation of groundwater derived from the Sierra Nevada to the east and from the Coast Ranges to the west under predevelopment conditions. Each region was divided into equal-area grid cells, ranging from 280 km2 in the SESJV to 984 km2 in the SSJV, for a total of 88 cells. These cell sizes were the minimum sizes in each region for which 60% of the cells in the region would contain at least 1 well with full major ion... Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Agriculture, California, Central Valley, California, Environment, GAMA, All tags... Geochemistry, Geographic Information Systems, Groundwater, Hydrogeology, Hydrology, NAWQA, PHREEQC, Public Supply Water Use, San Joaquin Valley, California, Total Dissolved Solids (TDS), Trends, United States, Water Quality, Fewer tags Groundwater-quality data and ancillary data for selected wells in the San Joaquin Valley, California, 1900-2015 This report provides a full digitization of historic groundwater-quality and depth-to-water data from Mendenhall and others (1916) Water Supply Paper 398, “Ground Water in San Joaquin Valley, California” in a modern format suitable for further analysis of California’s water supply resources. Included are geochemical data for over 400 wells collected by Mendenhall in the fall of 1910, as well as depth-to-water and well construction information from over 4000 wells compiled by his team from over 15 years of well surveys throughout the San Joaquin Valley. Additionally, these data provide geospatial and geochemical data for sampled wells in California's San Joaquin Valley (SJV) in support of the publication: Jeffrey... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Agriculture, California, Central Valley, California, Environment, GAMA, All tags... Geochemistry, Geographic Information Systems, Groundwater, Groundwater Quality, Hydrogeology, Hydrology, NAWQA, PHREEQC, Public Supply Water Use, San Joaquin Valley, California, Total Dissolved Solids (TDS), Trends, USGS Science Data Catalog (SDC), United States, Water Quality, Fewer tags Study Boundaries and Grid Cells for the Yuba and Bear Watersheds Shallow Aquifer Study Unit The U.S. Geological Survey collected groundwater samples from 71 domestic wells and 4 springs in Nevada, Yuba, Sierra, and Placer Counties, California in 2015-2016. The wells and springs were sampled for the Yuba and Bear Watersheds Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic drinking water supply. The Yuba and Bear Watersheds Shallow Aquifer Study Unit includes portions of the watersheds of the Upper Yuba (hydrologic unit code 18020125) and Upper Bear (hydrologic unit code 18020126) that are within the Sierra Nevada Province.... Types: ArcGIS Map Package, Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, GAMA, Nevada County, Placer County, Priority Basin Project, All tags... Sierra County, United States, Western United States, Yuba County, domestic wells, groundwater, shallow aquifer, water quality, Fewer tags Study Boundary and Grid Cells for the North and South American, Cosumnes, and Mokelumne River Watersheds Shallow Aquifer Study Unit The U.S. Geological Survey collected groundwater samples from 67 domestic wells and 1 spring used for domestic supply in Placer, El Dorado, Amador, and Calaveras Counties, California in 2016-2017. The sites were sampled for the Mokelumne, Cosumnes, and American River Watersheds (MCAW) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic drinking water supply. The MCAW study unit covered the parts of the Upper Mokelumne, Upper Cosumnes, and South and North Fork American River watersheds [8-digit hydrologic unit codes (HUC8) 18040012,... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Amador County, Calaveras County, California, El Dorado County, Environment, All tags... GAMA, Groundwater, Groundwater Ambient Monitoring and Assessment Program, Placer County, United States, Water-Quality, environment, geoscientificInformation, Fewer tags Groundwater-quality data in the Sacramento Metropolitan shallow aquifer study unit, 2017: Tables The U.S. Geological Survey collected groundwater samples from 49 wells used for domestic and small system drinking water supplies in Amador, Placer, Sutter, and Sacramento Counties, California in 2017. The wells were sampled for the Sacramento Metropolitan (SacMetro) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells are commonly screened at shallower depths than public-supply wells. The SacMetro study unit consisted of three “study areas” corresponding to three... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Amador County, California, Environment, GAMA, Groundwater, All tags... Groundwater Ambient Monitoring and Assessment Program, Placer County, Sacramento County, Sutter County, United States, Water-Quality, environment, geoscientificInformation, Fewer tags Groundwater-Quality Data in the Yuba and Bear Watersheds Shallow Aquifer Study Unit, 2015-2016: Tables The U.S. Geological Survey collected groundwater samples from 71 domestic wells and 4 springs in Nevada, Yuba, Sierra, and Placer Counties, California in 2015-2016. The sites were sampled for the Yuba and Bear Watersheds Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic drinking water supply. Domestic wells commonly are screened at shallower depths than are public-supply wells. The Yuba and Bear Watersheds Shallow Aquifer Study Unit includes the hard rock aquifer systems of the eastern Sierra Nevada in the Upper Yuba and Upper Bear... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Environment, GAMA, Groundwater, Groundwater Ambient Monitoring and Assessment Program, All tags... Nevada County, Placer County, Sierra County, United States, Water-Quality, Western United States, Yuba County, Fewer tags Groundwater-quality data in the Sacramento Metro shallow aquifer study unit, 2017: Results from the California GAMA Priority Basin Project The U.S. Geological Survey collected groundwater samples from 49 wells used for domestic and small system drinking water supplies in Amador, Placer, Sutter, and Sacramento Counties, California in 2017. The wells were sampled for the Sacramento Metropolitan (SacMetro) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells are commonly screened at shallower depths than public-supply wells. The SacMetro study unit consisted of three “study areas” corresponding to three... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Amador County, California, Environment, GAMA, Groundwater, All tags... Groundwater Ambient Monitoring and Assessment Program, Placer County, Sacramento County, Sutter County, USGS Science Data Catalog (SDC), United States, Water Quality, Water-Quality, environment, geoscientificInformation, Fewer tags Groundwater-quality data in the Mokelumne, Cosumnes, and American River Watersheds Shallow Aquifer Study Unit, 2016-2017: Tables The U.S. Geological Survey collected groundwater samples from 67 wells and 1 spring used for domestic and small system drinking water supplies in Placer, El Dorado, Amador, and Calaveras Counties, California in 2016-2017. The sites were sampled for the Mokelumne, Cosumnes, and American River Watersheds (MCAW) Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells commonly are screened at shallower depths than public-supply wells. The MCAW study unit covered the... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Amador County, Calaveras County, California, El Dorado County, Environment, All tags... GAMA, Groundwater, Groundwater Ambient Monitoring and Assessment Program, Placer County, United States, Water-Quality, environment, geoscientificInformation, Fewer tags