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Ground-Water Quality Data in the Coachella Valley Study Unit, 2007: Results from the California GAMA Program

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Ground-Water Quality Data in the Coachella Valley Study Unit, 2007: Results from the California GAMA Program In cooperation with the California State Water Resources Control Board A product of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Ground-Water Quality Data in the Coachella Valley Study Unit, 2007: Results from the California GAMA Program Data Series 373 Desert Hot Springs Mission Creek subbasin San Gorgonio Pass Banning subbasin Desert Palm Springs Hot Indio Springs subbasin subbasin Indio Mecca Salton Sea U.S. Department of the Interior U.S. Geological Survey Cover Photographs: Top: Wind farm, San Gorgonio Pass, California. Photograph taken by Dara Goldrath, U.S. Geological Survey (USGS). Middle: Coachella Canal with citrus orchard in background, Coachella Valley, California. Photograph taken by Michael T. Wright, (USGS). Bottom left: “Mr. Rex”, Cabazon, California. Photograph taken by Dara Goldrath, (USGS). Bottom right: Irrigation well on Golf course used for sampling near Indio, California. Photograph taken by Timothy Mathany, (USGS). Ground-Water Quality Data in the Coachella Valley Study Unit, 2007: Results from the California GAMA Program By Dara A. Goldrath, Michael T. Wright, and Kenneth Belitz Prepared in cooperation with the California State Water Resources Control Board Data Series 373 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior KEN SALAZAR, Secretary U.S. Geological Survey Suzette M. Kimball, Acting Director U.S. Geological Survey, Reston, Virginia: 2009 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod To order this and other USGS information products, visit http://store.usgs.gov Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this report. Suggested citation: Goldrath, Dara A., 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. Available at http://pubs.usgs.gov/ds/373 iii Contents Abstract ..........................................................................................................................................................1 Introduction ....................................................................................................................................................2 Purpose and Scope ..............................................................................................................................4 Hydrogeologic Setting ........................................................................................................................4 Methods ..........................................................................................................................................................6 Study Design ..........................................................................................................................................6 Sample Collection and Analysis .........................................................................................................8 Data Reporting.......................................................................................................................................8 Quality Assurance.................................................................................................................................8 Water Quality Results ...................................................................................................................................8 Quality-Control-Sample Results .........................................................................................................9 Comparison Thresholds .......................................................................................................................9 Ground-Water Quality Data ...............................................................................................................10 Field Parameters ........................................................................................................................10 Organic Constituents ................................................................................................................10 Constituents of Special Interest ..............................................................................................11 Inorganic Constituents ..............................................................................................................11 Isotopic Tracers ........................................................................................................................11 Radioactive Constituents ..........................................................................................................12 Microbial Indicators ..................................................................................................................12 Future Work .........................................................................................................................................12 Summary .......................................................................................................................................................12 Acknowledgments .......................................................................................................................................13 References Cited..........................................................................................................................................13 Appendix .......................................................................................................................................................51 iv Figures Figure 1. Map of the hydrogeologic provinces of California and the location of the Coachella Valley Groundwater Ambient Monitoring and Assessment (GAMA) study unit .......................................................................................................................................3 Figure 2. Map of the Coachella Valley Groundwater Ambient Monitoring and Assessment (GAMA) study unit showing the California Department of Water Resources defined groundwater subbasins within the study unit, locations of major cities, roads, rivers, and faults ....................................................................................5 Figure 3. Map of the Coachella Valley Groundwater Ambient Monitoring and Assessment (GAMA) study unit showing the distribution of study area grid cells, and the grid wells and understanding wells sampled. ...........................................................7 Tables Table 1. Identification, sampling, and construction information for wells sampled for the Coachella Valley Groundwater Ambient Monitoring and Assessment (GAMA) study, California, February and March 2007 ...........................................................................19 Table 2. Classes of chemical and microbial constituents and water-quality indicators collected for the slow and intermediate well sampling schedules in the Coachella Valley Groundwater Ambient Monitoring and Assessment (GAMA) study, California, February and March, 2007 ..........................................................................20 Table 3A. Volatile organic compounds, primary uses or sources, comparative thresholds, and reporting information for the U.S. Geological Survey (USGS) National Water Quality Laboratory schedule 2020 ............................................................................................21 Table 3B. Polar pesticides and pesticide degradates, primary uses or sources, comparative thresholds, and reporting information for the U.S. Geological Survey (USGS) National Water Quality Laboratory schedule 2060 ...............................................................23 Table 3C. Pesticides and pesticide degradates, primary uses or sources, comparative thresholds, and reporting information for the U.S. Geological Survey (USGS) National Water Quality Laboratory schedule 2003 ...............................................................25 Table 3D. Pharmaceutical compounds, primary uses or sources, comparative thresholds, and reporting information for the U.S. Geological Survey (USGS) National Water Quality Laboratory schedule 2080 ............................................................................................27 Table 3E. Potential wastewater indicator compounds, primary uses or sources, comparative thresholds, and reporting information for the U.S. Geological Survey (USGS) National Water Quality Laboratory schedule 4433 ...............................................................28 Table 3F. Constituents of special interest, primary uses or sources, comparative thresholds, and reporting information for the Montgomery Watson-Harza Laboratory .....................30 Table 3G. Nutrients and dissolved organic carbon, comparative thresholds, and reporting information for the U.S. Geological Survey (USGS) National Water Quality Laboratory schedule 2755 and lab code 2613 ........................................................................30
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