Faulkner; K.E.; and Dupuy; D.I., 2024, Groundwater-quality data in the Gilroy Hollister basin and surrounding areas Domestic-Supply Aquifer Study Unit 2022: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9OY3HT6 

    Levy; Z.F., 2024, Groundwater-Quality Time-Series Analyses and Potential Explanatory Factors of Drought-Response Patterns at Public-Supply Wells San Joaquin Valley California 2000-2022, U.S. Geological Survey data release, http://doi.org/10.5066/P1QXC3YS 

    Dupuy; D.I.; Nguyen; D.H.; and Jurgens; B.C., 2023, Central Valley Aquifer Age Dating (1st ed.), U.S. Geological Survey website, http://doi.org/10.5066/P9MA4MBP 

    Watson; E.; Johnson; T.D. and Dupuy; D.I., 2023, California Groundwater Ambient Monitoring and Assessment (GAMA) Program Domestic-Supply (Shallow) Aquifer Assessment Study Unit Boundaries and Grid Cells for Assessment of Groundwater Resources (version 3 January 2023), U.S. Geological Survey data release, http://doi.org/10.5066/P931PZRC 

    Faulkner; K.E.; and Dupuy; D.I., 2023, Groundwater-quality data in the Kern County Domestic-Supply Aquifer Study Unit 2022: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9GGNIQI 

    Voss; S.A.; Jurgens; B.C.; and Kent; R.H., 2023, Data for Per- and Polyfluoroalkyl Substances (PFAS) in groundwater samples collected by the California Groundwater Ambient Monitoring and Assessment Priority Basin Project 2019-2023, U.S. Geological Survey data release, http://doi.org/10.5066/P9ETQ00R 

    Lor; V. and Stork; S.V., 2023, Pharmaceutical Data from the California Groundwater Ambient Monitoring and Assessment Priority Basin Project (GAMA-PBP) Domestic Well Groundwater Quality Studies 2014 - 2021, U.S. Geological Survey data release, http://doi.org/10.5066/P9OOQVDI 

    Faulkner; K.E.; and Jurgens; B.C., 2022, Data for assessing the penetration depth post-1950s water in the Central Valley aquifer system California (July 2022), U.S. Geological Survey data release, http://doi.org/10.5066/P9CL07RX 

    Levy; Z.F.; and Borkovich; J.G., 2022, Compilation of Public-Supply Well Construction Depths in California, U.S. Geological Survey data release, http://doi.org/10.5066/P90OHVIC 

    Soldavini; A.L.; Goldrath; D.A.; Shelton; J.L.; Johnson; T.D.; and Watson; E., 2022, Groundwater-quality data in the Coachella Valley Domestic Supply Aquifer Study Unit 2020: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9UYXI95 

    Balkan; M.; Levy; Z.F.; Dupuy; D.I.; Shelton; J.L.; Johnson; T.D.; and Watson; E., 2022, Groundwater-quality data in the Modesto-Turlock-Merced Domestic-Supply Aquifer Study Unit 2020-2021: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P96R55KQ 

    Lor; V.; and Dupuy; D.I., 2022, Groundwater-quality data in the Butte-Sutter-Yuba Domestic-Supply Aquifer Study Unit 2021: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9RAXJTV 

    Fram; M.S.; and Stork; S.V., 2022, Generalized use classification for groundwater sites in California with publicly available water-quality data in the U.S. Geological Survey National Water Information System (NWIS) data archive, U.S. Geological Survey data release, http://doi.org/10.5066/P9IGMI7Y 

    Harkness; J.S., 2022, Potential Explanatory Variables for Groundwater Quality in the Redding-Red Bluff Shallow Aquifer Assessment Study Unit 2018-2019: California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9XQIWRU 

    Bennett V; G.L., 2022, Potential Explanatory Factors for Groundwater Quality in the Sacramento Metropolitan Domestic-Supply Aquifer Study Unit 2017: California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9H4P0XF 

    Watson; E. and Johnson; T.D., 2021, California Groundwater Ambient Monitoring and Assessment (GAMA) Program Shallow Aquifer Assessment Study Unit Grid Cells for Assessment of Groundwater Resources, U.S. Geological Survey data release, http://doi.org/10.5066/P931PZRC 

    Stork; S.V.; and Fram; M.S., 2021, Water use information for sites sampled by the California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project (GAMA-PBP) 2004-2021 (ver. 3.0 October 2023), U.S. Geological Survey data release, http://doi.org/10.5066/P9EHLFZM 

    Soldavini; A.L.; Burton; C.A.; and Lawrence; C.J., 2021, Detections of Fecal Indicator Bacteria and DNA Sequencing of Selected Bacterial Growths in Samples from the Madera/Chowchilla-Kings Domestic Aquifer Study unit 2014, U.S. Geological Survey data release, http://doi.org/10.5066/P9X7JH11 

    Kent; R.H., 2021, Data sets for: Sampling for Per- and Polyfluoroalkyl Substances (PFAS) by the Groundwater Ambient Monitoring and Assessment Priority Basin Project (GAMA-PBP), U.S. Geological Survey data release, http://doi.org/10.5066/P92IPRJD 

    Haugen; E.A.; and Arroyo-Lopez; J.A., 2021, Water Quality data compiled for Groundwater development leads to decreasing arsenic concentrations in the San Joaquin Valley California, U.S. Geological Survey data release, http://doi.org/10.5066/P9OZ50BM 

    Balkan; M.; Levy; Z.F.; Shelton; J.L.; Johnson; T.D.; and Watson; E., 2021, Groundwater-quality data in the Northern San Joaquin Valley Domestic-Supply Aquifer Study Unit 2019, U.S. Geological Survey data release, http://doi.org/10.5066/P9Q083IB 

    Bennett; G.L., 2020, Blank results for trace-element data collected for the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project October 2009–October 2018, U.S. Geological Survey data release, http://doi.org/10.5066/P9TRFPUO 

    Shelton; J.L; Bennett; G.L.; Watson; E.; and Johnson; T.D., 2020, Groundwater-quality data in the Redding-Red Bluff Shallow Aquifer Study Unit 2018-2019: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9ZKAH3O 

    Levy; Z.F., 2020, Potential Explanatory factors for Groundwater Quality in the Northern Sierra Nevada Foothills Domestic-Aquifer Assessment Study Units 2015-2017: California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9Z3O812 

    Fram; M.S., 2020, Pesticide constituent data from the California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project (GAMA-PBP) August 2013 - May 2018 schedule 2437 constituents, U.S. Geological Survey data release, http://doi.org/10.5066/P9IYH6ZY 

    Voss; S.A.; Miller-Schulze; J.; and De Parsia; E.R., 2019, Sucralose Concentrations in Groundwater in California's Sacramento Valley Shallow Aquifer System, U.S. Geological Survey data release, http://doi.org/10.5066/P9GNEQX1 

    Lor; V.; Balkan; M.; and Stork; S.V., 2019, Pesticide Constituent Data from the California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project (GAMA-PBP) 2004 - 2018, U.S. Geological Survey data release, http://doi.org/10.5066/P9344TOS 

    Levy; Z.F.; and Faulkner; K.E., 2019, Dissolved Noble Gas Concentrations and Modeled Recharge Temperatures for Groundwater from Northern Sierra Nevada Foothills Shallow Aquifer Assessment Study Units 2015-2017: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9YETK9P 

    Groover; K.D.; Goldrath; D.A.; Bennett; G.L.; Johnson; T.D.; and Watson; E.E., 2019, Groundwater-Quality Data in the Mojave Basin Shallow Aquifer Study Unit 2018: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9C7U6DW 

    Fram; M.S., 2019, Water quality and ancillary data for assessment of uranium concentrations in groundwater San Joaquin Valley CA (ver. 1.1 December 2019), U.S. Geological Survey data release, http://doi.org/10.5066/P94ME8S6 

    Bennett; G.L.; V.; Shelton; J.L.; Watson; E.; Johnson; T.D.; and Jasper; M., 2019, Groundwater-quality data in the Sacramento Metro shallow aquifer study unit 2017: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/P9BPGEGH 

    Stork; S.V.; McGregor; A.M.; Balkan; M.; Arroyo-Lopez; J.; Borkovich; J.G.; Lor; V.; Peng; S.; and Jasper; M., 2019, Attributed California Water Supply Well Completion Report Data for Selected Areas Derived from CA WCR OSCWR Data, U.S. Geological Survey data release, http://doi.org/10.5066/P9R1V41Q 

    Voss; S.A.; and Jurgens; B.C., 2018, Spatial Point Data Sets and Interpolated Surfaces of Well Construction Characteristics for Domestic and Public Supply Wells in the Central Valley California USA, U.S. Geological Survey data release, http://doi.org/10.5066/F76Q1V9G 

    Shelton; J.L.; Fram; M.S.; Goldrath; D.A.; Bennett; G.L.; V; and Jasper; M., 2018, 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, U.S. Geological Survey data release, http://doi.org/https://doi.org/10.5066/F78G8JXP 

    Kent; R.H., 2018, Data sets for: Variations on a method for evaluating decadal-scale changes in the groundwater quality of two GAMA coastal study units 2004-2014 California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/F7GH9GF5 

    Johnson; T.D.; Watson; E.; and Belitz; K., 2018, 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, U.S. Geological Survey data release, http://doi.org/10.5066/F79Z93CN 

    Hansen; J.A.; Jurgens B.C.; and Fram; M.S., 2018, Groundwater-quality data and ancillary data for selected wells in the San Joaquin Valley California 1900-2015, U.S. Geological Survey data release, http://doi.org/10.5066/F7319T3K 

    Shelton; J.L.; and Fram; M.S., 2017, Groundwater-quality data for the Madera/Chowchilla–Kings shallow aquifer study unit 2013–14: Results from the California GAMA Program, U.S. Geological Survey Data Series 1019, http://doi.org/10.3133/ds1019 

    Jasper; M.; Bennett; G.L.; and Fram; M.S., 2017, Groundwater-Quality Data in the Yuba and Bear Watersheds Shallow Aquifer Study Unit 2015-2016: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/F73F4MS9 

    Mathany; T.M., 2017, Groundwater-quality data in 12 GAMA study units: Results from the 2006–10 initial sampling period and the 2008–13 trend sampling period California GAMA Priority Basin Project, U.S. Geological Survey Data Series Report 1038, http://doi.org/10.3133/ds1038 

    Bennett; G.L.; V; Fram; M.S.; and Johnson; T.D., 2017, Groundwater-Quality Data in the Tulare Shallow Aquifer Study Unit 2014-2015: Results from the California GAMA Priority Basin Project, U.S. Geological Survey data release, http://doi.org/10.5066/F7BP00W8 

    Goldrath; D.A.; Kulongoski; J.T.; and Davis; T.A., 2015, Groundwater-quality data in the Monterey–Salinas shallow aquifer study unit (ver. 1.1 January 2017): Results from the California GAMA Program, U.S. Geological Survey Data Series 987, 132 p., http://doi.org/10.3133/ds987 

    Kent; Robert, 2015, Groundwater quality data in 15 GAMA study units: Results from the 2006–10 initial sampling and the 2009–13 resampling of wells California GAMA Priority Basin Project, U.S. Geological Survey Data Series 919, 219 p., http://doi.org/10.3133/ds919 

    Fram; M.S.; and Belitz; K., 2014, Status and understanding of groundwater quality in the Sierra Nevada Regional Study Unit 2008: California GAMA Priority Basin Project, U.S. Geological Survey Scientific Investigations Report 2014-5174, 118 p., http://doi.org/10.3133/sir20145174 

    Johnson; T.D.; and Belitz; K., 2014, California groundwater units, U.S. Geological Survey Data Series 796, 34 p., http://doi.org/10.3133/ds796 

    Mathany; T.M.; and Belitz; Kenneth, 2014, Groundwater-quality data in the Klamath Mountains study unit 2010—Results from the California GAMA Program, U.S. Geological Survey Data Series 803, 82 p., http://doi.org/10.3133/ds803 

    Kent; Robert; Belitz; Kenneth; and Fram; M.S., 2014, Groundwater-quality data in seven GAMA study units: Results from initial sampling 2004–2005 and resampling 2007–2008 of wells: California GAMA Program Priority Basin Project, U.S. Geological Survey Data Series 795, 170 p., http://doi.org/10.3133/ds795 

    Davis; T.A.; and Shelton; J.L., 2014, Groundwater-quality data in the Santa Cruz San Gabriel and Peninsular Ranges Hard Rock Aquifers study unit 2011–2012—Results from the California GAMA Program, U.S. Geological Survey Data Series 874, 142 p., http://doi.org/10.3133/ds874 

    Bennett; G.L.;V; and Fram; M.S., 2014, Groundwater-quality data in the North San Francisco Bay Shallow Aquifer study unit 2012—Results from the California GAMA Program, U.S. Geological Survey Data Series 865, 94 p., http://doi.org/10.3133/ds865 

    Shelton; J.L.; Fram; M.S.; and Belitz; Kenneth, 2013, Groundwater-quality data in the Cascade Range and Modoc Plateau study unit 2010—Results from the California GAMA Program, U.S. Geological Survey Data Series 688, 124 p., http://doi.org/10.3133/ds688 

    Mathany; T.M.; Landon; M.K.; Shelton; J.L.; and Belitz; Kenneth, 2013, Groundwater-quality data in the Western San Joaquin Valley study unit 2010—Results from the California GAMA Program, U.S. Geological Survey Data Series 706, 102 p., http://doi.org/10.3133/ds706 

    Mathany; T.M.; and Belitz; Kenneth, 2013, Groundwater-quality data in the Bear Valley and Selected Hard Rock Areas study unit 2010: Results from the California GAMA Program, U.S. Geological Survey Data Series 747, 86 p., http://doi.org/10.3133/ds747 

    Davis; T.A.; Kulongoski; J.T.; and Belitz; Kenneth, 2013, Groundwater-quality data in the Santa Barbara study unit 2011—Results from the California GAMA Program, U.S. Geological Survey Data Series 742, 72 p., http://doi.org/10.3133/ds742 

    Mathany; T.M.; Wright; M.T.; Beuttel; B.S.; and Belitz; Kenneth, 2012, Groundwater-quality data in the Borrego Valley Central Desert and Low-Use Basins of the Mojave and Sonoran Deserts study unit 2008–2010—Results from the California GAMA Program, U.S. Geological Survey Data Series 659, 100 p., http://doi.org/10.3133/ds659 

    Mathany; T.M.; Dawson; B.J.; Shelton; J.L.; and Belitz; Kenneth, 2011, Groundwater-quality data in the northern Coast Ranges study unit 2009: Results from the California GAMA Program, U.S. Geological Survey Data Series 609, 92 p., http://doi.org/10.3133/ds609 

    Mathany; T.M.; Burton; C.A.; Land; M.; and Belitz; K., 2010, Groundwater-Quality Data in the South Coast Range-Coastal Study Unit 2008: Results from the California GAMA Program, U.S. Geological Survey Data Series 504, 106 p., http://doi.org/10.3133/ds504 

    Shelton; J.L.; Fram; M.S.; Munday; C.M.; and Belitz; K., 2010, Groundwater-quality data for the Sierra Nevada study unit 2008: Results from the California GAMA program, U.S. Geological Survey Data Series 534, 82 p., http://doi.org/10.3133/ds534 

    Ray; M.C.; Kulongoski; J.T.; and Belitz; Kenneth, 2009, Ground-water quality data in the San Francisco Bay study unit 2007: Results from the California GAMA program, U.S. Geological Survey Data Series 396, 92 p., http://doi.org/10.3133/ds396 

    Goldrath; D.A.; Wright; M.T.; and Belitz; Kenneth, 2009, Groundwater-quality data in the Colorado River study unit 2007: Results from the California GAMA program, U.S. Geological Survey Data Series 474, 66 p., http://doi.org/10.3133/ds474 

    Schmitt; S.J.; Milby Dawson; B.J.; and Belitz; Kenneth, 2009, Groundwater-quality data in the Antelope Valley study unit 2008: Results from the California GAMA program, U.S. Geological Survey Data Series 479, 79 p., http://doi.org/10.3133/ds479 

    Montrella; Joseph; and Belitz; Kenneth, 2009, Ground-water quality data in the Santa Clara River Valley study unit 2007: Results from the California GAMA Program, U.S. Geological Survey Data Series 408, 84 p., http://doi.org/ 

    Mathany; T.M.; Kulongski; J.T.; Ray; M.C.; and Belitz; Kenneth, 2009, Groundwater-quality data in the South Coast Interior Basins study unit 2008: Results from the California GAMA program, U.S. Geological Survey Data Series 463, 82 p., http://doi.org/10.3133/ds463 

    Kent; Robert; and Belitz; Kenneth, 2009, Ground-water quality data in the Upper Santa Ana Watershed Study Unit November 2006 to March 2007: Results from the California GAMA Program, U.S. Geological Survey Data Series 404, 116 p., http://doi.org/10.3133/ds404 

    Goldrath; Dara; Wright; Michael T.; and Belitz; Kenneth, 2009, Ground-water quality data in the Coachella Valley study unit 2007: Results from the California GAMA Program, U.S. Geological Survey Data Series 373, 70 p., http://doi.org/10.3133/ds373 

    Fram; M.S.; Munday; Cathy; and Belitz; Kenneth, 2009, Groundwater quality data for the Tahoe–Martis study unit 2007: Results from the California GAMA Program, U.S. Geological survey Data Series 432, 88 p., http://doi.org/10.3133/ds432 

    Bennett; P.A.; Bennett; G.L.; V; Belitz; Kenneth, 2009, Groundwater quality data in the northern Sacramento Valley 2007: Results from the California GAMA program, U.S. Geological Survey Data Series 452, 90 p., http://doi.org/10.3133/ds452 

    Mathany; T.M.; Land; M.; and Belitz; K., 2009, Ground-Water Quality Data in the Coastal Los Angeles Basin Study Unit 2006: Results from the California GAMA Program, U.S. Geological Survey Data Series 387, http://doi.org/10.3133/ds387 

    Mathany; T.M.; and Belitz; K., 2009, Groundwater quality data in the Mojave study unit 2008: Results from the California GAMA Program, U.S. Geological Survey Data Series 440, 81 p., http://doi.org/10.3133/ds440 

    Shelton; J.L.; Fram; M.S.; and Belitz; Kenneth, 2009, Groundwater-quality data for the Madera-Chowchilla study unit 2008: results from the California GAMA program, U.S. Geological Survey Data Series 455, 80 p., http://doi.org/10.3133/ds455 

    Densmore; J.N.; Fram; M.S.; and Belitz; Kenneth, 2009, Ground-water quality data in the Owens and Indian Wells Valleys study unit 2006: Results from the California GAMA program, U.S. Geological Survey Data Series 427, 86 p., http://doi.org/10.3133/ds427 

    Shelton; J.L.; Pimentel; I.; Fram; M.S. and Belitz; K., 2008, Ground-Water Quality Data in the Kern County Subbasin Study Unit 2006—Results from the California GAMA Program, U.S. Geological Survey Data Series 337, 75 p., http://doi.org/10.3133/ds337 

    Schmitt; S.J.; Fram; M.S.; Milby Dawson; B.J.; Belitz; K., 2008, Ground-water quality data in the middle Sacramento Valley study unit 2006—results from the California GAMA program, U.S. Geological Survey Data Series 385, 100 p., http://doi.org/10.3133/ds385 

    Landon; M.K.; and Belitz; K., 2008, Ground-Water Quality Data in the Central Eastside San Joaquin Basin 2006: Results from the California GAMA Program, U.S. Geological Survey Data Series 325, http://doi.org/10.3133/ds325 

    Land; M. and Belitz; K., 2008, Ground-Water Quality Data in the San Fernando–San Gabriel Study Unit 2005—Results from the California GAMA Program, U.S. Geological Survey Data Series 356, http://doi.org/10.3133/ds356 

    Ferrari; M.J.; Fram; M.S.; and Belitz; K., 2008, Ground-Water Quality Data in the Central Sierra Study Unit 2006—Results from the California GAMA Program, U.S. Geological Survey Data Series 335, http://doi.org/10.3133/ds335 

    Milby Dawson; B.J.; Bennett V; G.L.; and Belitz; K., 2008, Ground-Water Quality Data in the Southern Sacramento Valley California 2005—Results from the California GAMA Program, U.S. Geological Survey Data Series 285, http://doi.org/10.3133/ds285 

    Burton; C.A.; and Belitz; K., 2008, Ground-Water Quality Data in the Southeast San Joaquin Valley 2005–2006—Results from the California GAMA Program, U.S. Geological Survey Data Series 351, http://doi.org/10.3133/ds351 

    Kulongoski; J.T. and Belitz; K., 2007, Ground-water quality data in the Monterey Bay and Salinas Valley Basins California 2005: results from the California GAMA Program, U.S. Geological Survey Data Series 258, http://doi.org/10.3133/ds258 

    Fram; M.S. and Belitz; K., 2007, Ground-water quality data in the Southern Sierra study unit 2006— Results from the California GAMA program, U.S. Geological Survey Data Series 301, http://doi.org/10.3133/ds301 

    Bennett V; G.L.; Belitz; K.; and Milby Dawson; B.J., 2006, California GAMA Program: Ground-Water Quality Data in the Northern San Joaquin Basin Study Unit 2005, U.S. Geological Survey Data Series 196, http://doi.org/10.3133/ds196 

    Kulongoski; J.T.; Belitz; Kenneth; and Dawson; B.J., 2006, Ground-water quality data in the North San Francisco Bay hydrologic provinces California 2004: Results from the California Ground-Water Ambient Monitoring and Assessment (GAMA) Program, U.S. Geological Survey Data Series Report 167, 100 p., http://doi.org/10.3133/ds167 

    Wright; M.T.; Belitz; K.; and Burton; C.A., 2005, California GAMA Program: Ground-Water Quality Data in the San Diego Drainages Hydrogeologic Province California 2004, U.S. Geological Survey Data Series 129, http://doi.org/10.3133/ds129 

    Johnson; T.D.; and Belitz; K., 2003, Hydrogeologic Provinces for California based upon established groundwater basins and watershed polygons, U.S. Geological Survey Open-File Report 2003-470, http://doi.org/10.3133/ofr03470