Groundwater-quality data in the Coachella Valley Domestic Supply Aquifer Study Unit, 2020: Tables, (ver. 2.0)

Dates

Publication Date: 2021-08-31
Start Date: 2020-01-13
End Date: 2020-07-01

Citation

Soldavini, A.L., Goldrath, D.A., Shelton, J.L., Johnson, T.D., and Watson, E., 2021, Groundwater-quality data in the Coachella Valley Domestic Supply Aquifer Study Unit, 2020: Results from the California GAMA Priority Basin Project (ver. 2.0, May 2022): U.S. Geological Survey data release, https://doi.org/10.5066/P9UYXI95.

Summary

The U.S. Geological Survey collected groundwater samples from 38 wells used for domestic and small system drinking water supply in the Coachella Valley of California in 2020. The wells were sampled for the Coachella Valley Basin (CODA) Domestic 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. Coachella Valley is located in the Desert hydrogeologic province (Johnson and Belitz, 2003) and is structurally divided into four subbasins by the San Andreas fault: the Indio subbasin, the Mission Creek subbasin, the Desert Hot [...]

Summary

The U.S. Geological Survey collected groundwater samples from 38 wells used for domestic and small system drinking water supply in the Coachella Valley of California in 2020. The wells were sampled for the Coachella Valley Basin (CODA) Domestic 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. Coachella Valley is located in the Desert hydrogeologic province (Johnson and Belitz, 2003) and is structurally divided into four subbasins by the San Andreas fault: the Indio subbasin, the Mission Creek subbasin, the Desert Hot Springs subbasin, and the San Gorgonio Pass subbasin (California Department of Water Resources, 2016). These basins have CA basin designations 7-21.01, 7-21.02, 7-21.03, and 7-21.04 respectively. The study area was divided into 30 equal-area grid cells with at least one well sampled in 26 of the 30 cells. The 10 understanding wells were selected to provide more data in areas where wells were more abundant and to provide more water quality data for wells in the State Small Water System program. In three cases, Sampled wells within 1 mile of an unsampled cell were used to represent unsampled grid cells. Groundwater samples from all 38 wells were analyzed for field water-quality parameters and microbial indicators, volatile organic compounds, pesticides and pesticide degradates, major ions and trace elements, chromium (VI), perchlorate, nutrients, carbon-14 in dissolved inorganic carbon, stable isotopic ratios of water, tritium, per- and polyfluoroalkyl substances (PFAS), sulfur hexafluoride, and noble gases. Groundwater levels were measured in 31 of the 38 wells. All results are presented in this data release, except results sulfur hexafluoride and noble gases.

NOTE: The only difference between the original version of this data release and this version is that this data release includes results for tritium. Tritium results were not included in the original version because they were not available at the time of publication.

Contacts

Point of Contact :: Andrew L Soldavini
Originator :: Andrew L Soldavini, Dara Goldrath, Jennifer L Shelton
Metadata Contact :: Andrew L Soldavini
Publisher :: U.S. Geological Survey
Distributor :: U.S. Geological Survey - ScienceBase
USGS Mission Area :: Water Resources
SDC Data Owner :: California Water Science Center

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Tables_Groundwater_Quality_Data_in_the_Coachella_Valley_Domestic_Supply_Aquifer_Study_Unit_Metadata_ver2.0.xml Original FGDC Metadata	View	111.51 KB	application/fgdc+xml
GAMA_S11_CODA_Table01_Sites.xlsx		30.4 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table02_Constituents_ver 2.0.xlsx		40.7 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table03_Field.xlsx		18.32 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table04_VOCs.xlsx		13.51 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table05_Pesticides.xlsx		12.3 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table06_Nutrients.xlsx		15.76 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table07_TraceElements_MajorIons.xlsx		23.83 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table08_Isotopes_ver 2.0.xlsx		15.33 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table09_PFAS.xlsx		13.01 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table10_BlankDetects.xlsx		14.01 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_CODA_Table11_Replicates_ver 2.0.xlsx		22.98 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
GAMA_S11_Table_Explanations_ver 2.0.docx		531.04 KB	application/vnd.openxmlformats-officedocument.wordprocessingml.document

Purpose

This data release presents the data collected for the Groundwater Ambient Monitoring and Assessment Program Priority Basin Project CODA Domestic Aquifer Study Unit in 2020. These data include: study unit and grid cell boundaries, site information for the 28 grid wells, and 10 understanding wells; water-quality results for samples collected from these 38 sites, and water-quality results for quality-control samples collected from 12 sites. Subsequent publications will present analysis and interpretation of these data. This document provides information necessary to understand the results presented in 10 tables provided in this data release.

Groundwater-quality data in the Coachella Valley Domestic Supply Aquifer Study Unit, 2020: Tables, (ver. 2.0)

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