Search datasets
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This data release codifies and attributes explanatory variables at 33 wells used for domestic water supply. The sites were used to assess groundwater quality in the U.S. Geological Survey Priority...
Search relevance: 67.27 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 10:47 PM -
This data release codifies and attributes explanatory variables that could potentially influence groundwater quality at 50 groundwater wells used for domestic water supply and 43 groundwater sites...
Search relevance: 62.77 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 08:19 PM -
The California Groundwater Ambient Monitoring and Assessment Program (GAMA) is a statewide assessment of groundwater quality designed to help better understand and identify risks to groundwater...
Search relevance: 59.94 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 09:57 PM -
This data release codifies and attributes explanatory factors that could potentially impact groundwater quality at 142 groundwater sites (wells or developed springs) used for domestic water supply...
Search relevance: 51.41 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 08:38 PM -
Groundwater quality data were collected in 5,000 wells between 1988-2001 by the National Water-Quality Assessment Project. About 1,500 of these wells were sampled again between 2002-2012 to...
Search relevance: 48.33 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 10:07 PM -
Approximately 43 million people (about 14 percent of the U.S. population) rely on domestic wells as their source of drinking water. Unlike community water systems, which are regulated by the Safe...
Search relevance: 48.32 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 09:31 PM -
Abstract: This digital dataset contains the virtual wells used for pumpage for the Central Valley Hydrologic Model (CVHM). The Central Valley encompasses an approximate 50,000 square-kilometer...
Search relevance: 47.68 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 09:11 PM -
Mendenhall and others (1916) assessed groundwater resources in California's San Joaquin Valley in 1910 to estimate the availability of groundwater of suitable quality for agricultural, industrial,...
Search relevance: 47.32 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 09:23 PM -
Arsenic concentrations from 20,450 domestic wells in the U.S. were used to develop a logistic regression model of the probability of having arsenic > 10 µg/L (“high arsenic”), which is presented...
Search relevance: 47.02 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 10:47 PM -
This digital dataset contains historical geochemical and other information for 271 samples of produced water from 143 sites in or near the San Ardo Oil Field in Monterey County, central...
Search relevance: 46.77 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 08:27 PM -
This digital dataset contains historical geochemical and other information for 45 samples of produced water from 38 sites in the Placerita and Newhall Oil Fields in Los Angeles County, southern...
Search relevance: 45.94 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 08:25 PM -
The U.S. Geological Survey collected water-quality samples from 3,359 sites between May 2004 and November 2024 for the California Groundwater Ambient Monitoring and Assessment Program Priority...
Search relevance: 45.81 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 10:01 PM -
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...
Search relevance: 45.72 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 09:53 PM -
This data provides improved estimates of the dependence and spatial distribution of housing units reliant on private domestic wells by census block group and block. Nationally, based on an...
Search relevance: 45.59 | Views last month: 8 | Catalog Last Checked: September 10, 2026 at 06:58 PM -
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...
Search relevance: 45.55 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 09:59 PM -
This digital dataset contains historical geochemical and other information for 200 samples of produced water from 182 sites in 25 oil fields in Los Angeles and Orange Counties, southern...
Search relevance: 45.36 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 09:00 PM -
This digital dataset represents historical geochemical and other information for 58 sample results of produced water from 56 sites in the Orcutt and Oxnard oil fields in Santa Barbara and Ventura...
Search relevance: 44.53 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 08:47 PM -
Groundwater arsenic concentrations in the San Joaquin Valley have varied over the decades from 1980 to 2019. This report was compiled to determine whether arsenic concentrations are increasing or...
Search relevance: 44.44 | Views last month: 5 | Catalog Last Checked: September 10, 2026 at 08:57 PM -
The upper portion of the Troublesome Aquifer is the sole source of water for domestic use in the Greater Pole Creek Basin, situated in the western portion of the upper Fraser River Valley in Grand...
Search relevance: 43.91 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 10:08 PM -
This digital dataset contains historical geochemical and other information for 89 samples of produced water from 84 sites in the Santa Maria Valley Oil Field in Santa Barbara County, California....
Search relevance: 43.89 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 10:19 PM
