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#1 Federal

Data for assessing the penetration depth post-1950s water in the Central Valley aquifer system, California (July 2022)

Organization: Department of the Interior
Dataset Last Updated: February 01, 2023 at 12:00 AM

This dataset provides groundwater ages estimates that were used in an assessment of the penetration depth of modern groundwater in the Central Valley aquifer system (CVAL). Groundwater ages were...

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Search relevance: 1.00 | Views last month: 12 | Catalog Last Checked: May 05, 2026 at 09:49 PM

#2 Federal

Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 2. Detailed information on the calibration of dissolved gas models to dissolved gas concentrations (neon, argon, krypton, xenon, and nitrogen).

Organization: Department of the Interior
Dataset Last Updated: August 26, 2020 at 12:00 AM

High radium (Ra) concentrations in potable portions of the Cambrian-Ordovician (C-O) aquifer system were investigated using water-quality data and environmental tracers ( 3H, 3Hetrit, SF6 , 14C...

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Search relevance: 1.00 | Views last month: 8 | Catalog Last Checked: May 05, 2026 at 08:18 PM

#3 Federal

Data for Assessing the Susceptibility of Groundwater Using Environmental Tracers in Northern Atlantic Coastal Plain Aquifer System and Piedmont and Blue Ridge Crystalline-Rock Aquifers of Eastern United States

Organization: Department of the Interior
Dataset Last Updated: August 26, 2020 at 12:00 AM

This data release documents four tables that contain data for assessing the susceptibility of groundwater using environmental tracers collected from public-supply wells located in the Northern...

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Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: May 05, 2026 at 08:38 PM

#4 Federal

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

Organization: Department of the Interior
Dataset Last Updated: August 12, 2020 at 12:00 AM

This data release documents 155 sets of dissolved noble gas analyses (neon, argon, krypton, xenon) and 153 modeled recharge temperatures for groundwater sampled from domestic water supply wells...

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Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: May 05, 2026 at 09:33 PM

#5 Federal

Data Release for Dissolved Gas, Environmental Tracer Concentrations, and Lumped Parameter Modeling Results Used in Determination of Groundwater Mean Age and Age Distributions in the Glacial Aquifer System, Conterminous United States

Organization: Department of the Interior
Dataset Last Updated: August 27, 2020 at 12:00 AM

This data release documents nine Microsoft Excel tables that contain data for understanding groundwater ages in the Glacial aquifer system. Results for the four sample networks (PAS, principal...

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Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: May 05, 2026 at 09:23 PM

#6 Federal

Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA

Organization: Department of the Interior
Dataset Last Updated: August 26, 2020 at 12:00 AM

High radium (Ra) concentrations in potable portions of the Cambrian-Ordovician (C-O) aquifer system were investigated using water-quality data and environmental tracers ( 3H, 3Hetrit, SF6 , 14C...

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Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 09:17 PM

#7 Federal

Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 3. Detailed information on calculations of environmental tracer data.

Organization: Department of the Interior
Dataset Last Updated: August 26, 2020 at 12:00 AM

High radium (Ra) concentrations in potable portions of the Cambrian-Ordovician (C-O) aquifer system were investigated using water-quality data and environmental tracers ( 3H, 3Hetrit, SF6 , 14C...

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Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 09:08 PM

#8 Federal

Data for groundwater age estimates for the Mississippi River Valley alluvial aquifer based on tracer data collected during 2018-20

Organization: Department of the Interior
Dataset Last Updated: February 13, 2025 at 12:00 AM

This data release contains tracer data and estimated age distributions of groundwater samples collected as part of a water availability study for the Mississippi alluvial plain (MAP). The MAP is...

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Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: May 05, 2026 at 08:33 PM

#9 Federal

Groundwater data and age information from samples collected in Minnesota (ver. 3.0, December 2025)

Organization: Department of the Interior
Dataset Last Updated: December 01, 2025 at 12:00 AM

Groundwater age distributions and susceptibility to natural and anthropogenic contaminants were assessed for selected wells, streambed piezometers, and springs in southeastern Minnesota. The data...

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Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: May 05, 2026 at 08:43 PM

#10 Federal

Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 1. Dissolved gas modeling results, environmental tracer concentrations (tritium, tritiogenic helium-3, sulfur hexafluoride, carbon-14, and radiogenic helium-4), and results for the mean age of groundwater by calibration of lumped parameter models to tracer concentrations.

Organization: Department of the Interior
Dataset Last Updated: August 26, 2020 at 12:00 AM

High radium (Ra) concentrations in potable portions of the Cambrian-Ordovician (C-O) aquifer system were investigated using water-quality data and environmental tracers ( 3H, 3Hetrit, SF6 , 14C...

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Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: May 05, 2026 at 09:22 PM

#11 Federal

Groundwater age-tracing data and models in a PFOA-contaminated bedrock aquifer, North Bennington, Vermont

Organization: Department of the Interior
Dataset Last Updated: April 25, 2023 at 12:00 AM

We computed mean groundwater ages and age distributions at eight wells by calibrating lumped parameter models (LPMs) to concentrations of tracers (3H, CFCs, SF6) in samples using the computer...

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Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: May 05, 2026 at 09:53 PM

#12 Federal

Data for Distribution of Groundwater Age in Aquifers Used for Public Supply in the Continental United States, 2004 - 2017 (Version 1.1: June 2022).

Organization: Department of the Interior
Dataset Last Updated: July 07, 2022 at 12:00 AM

This data release documents seven tables that contain environmental tracer data and lumped parameter model (LPM) results that are used for assessing the distribution of groundwater age in 23...

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Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: May 05, 2026 at 08:15 PM

#13 Federal

Groundwater data and age information from samples collected in Minnesota, 1996-1997

Organization: Department of the Interior
Dataset Last Updated: December 01, 2025 at 12:00 AM

Groundwater age distributions and susceptibility to natural and anthropogenic contaminants were assessed for selected wells across Minnesota. The data provide information to understand how long it...

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Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 10:19 PM

#14 Federal

Recharge temperatures and groundwater-age models for the Paradox Valley alluvial aquifer, 2011, Colorado

Organization: Department of the Interior
Dataset Last Updated: December 22, 2023 at 12:00 AM

The U.S. Geological Survey (USGS), in cooperation with the Bureau of Reclamation, began hydrogeologic investigations in 2009 in the Paradox Valley in Colorado. In June 2011, nine groundwater...

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Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 09:40 PM

#15 Federal

Data for Groundwater age and susceptibility of south Atlantic and Gulf Coast principal aquifer of the contiguous United States

Organization: Department of the Interior
Dataset Last Updated: August 26, 2020 at 12:00 AM

This data release documents eight Microsoft Excel tables; four which contain data for understanding groundwater ages in the South East Coastal Plain (SECP), Coastal Lowlands (CLOW) and Mississippi...

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Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 08:15 PM

#16 Federal

Coastal Groundwater Chemical Data from the North and South Shores of Long Island, New York

Organization: Department of the Interior
Dataset Last Updated: March 19, 2024 at 12:00 AM

Groundwater data were collected in the spring and fall of 2008 from three sites representing different geological settings and biogeochemical conditions within the surficial glacial aquifer of...

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Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 09:12 PM

#17 Federal

Data for assessing the susceptibility of groundwater used for drinking water supply from selected principal aquifers of the Western United States, 2004-2018

Organization: Department of the Interior
Dataset Last Updated: August 12, 2020 at 12:00 AM

Groundwater age distribution and susceptibility to natural and anthropogenic contaminants were assessed for selected principal aquifers of the Western United States: the Central Valley aquifer...

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Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: May 05, 2026 at 08:50 PM

#18 Federal

Lumped parameter models of groundwater age and noble gas models of recharge conditions in support of Groundwater and Surface-Water Resources near Red Fleet Reservoir, Uintah County, UtahLumped parameter models of groundwater age and noble gas models of recharge conditions in support of Groundwater and Surface-Water Resources near Red Fleet Reservoir, Uintah County, Utah

Organization: Department of the Interior
Dataset Last Updated: August 27, 2020 at 12:00 AM

This data release documents four Microsoft Excel tables; one contains data for understanding water ages, one contains noble gas model data, two that describe the data fields. Results described...

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Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: May 05, 2026 at 09:53 PM

#19 Federal

Data for assessing groundwater age and recharge rates using environmental tracers for groundwater basins in the Gilroy-Hollister area and northern San Joaquin Valley, California

Organization: Department of the Interior
Dataset Last Updated: July 08, 2025 at 12:00 AM

This dataset provides groundwater age estimates for 203 wells used as public- and domestic-supply in two selected areas of California. Groundwater ages were estimated by calibration of...

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Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: May 05, 2026 at 09:35 PM

#20 Federal

Noble gas isotopes and lumped parameter model results for environmental tracer based groundwater ages, South Rim Grand Canyon, Arizona, USA

Organization: Department of the Interior
Dataset Last Updated: August 27, 2020 at 12:00 AM

This data release documents three Microsoft Excel tables; one contains noble gas isotopic data, one contains data for understanding groundwater ages in the South Rim of the Grand Canyon, and one...

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Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: May 05, 2026 at 07:28 PM

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Data for assessing the penetration depth post-1950s water in the Central Valley aquifer system, California (July 2022)

Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 2. Detailed information on the calibration of dissolved gas models to dissolved gas concentrations (neon, argon, krypton, xenon, and nitrogen).

Data for Assessing the Susceptibility of Groundwater Using Environmental Tracers in Northern Atlantic Coastal Plain Aquifer System and Piedmont and Blue Ridge Crystalline-Rock Aquifers of Eastern United States

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

Data Release for Dissolved Gas, Environmental Tracer Concentrations, and Lumped Parameter Modeling Results Used in Determination of Groundwater Mean Age and Age Distributions in the Glacial Aquifer System, Conterminous United States

Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA

Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 3. Detailed information on calculations of environmental tracer data.

Data for groundwater age estimates for the Mississippi River Valley alluvial aquifer based on tracer data collected during 2018-20

Groundwater data and age information from samples collected in Minnesota (ver. 3.0, December 2025)

Groundwater age-tracing data and models in a PFOA-contaminated bedrock aquifer, North Bennington, Vermont

Data for Distribution of Groundwater Age in Aquifers Used for Public Supply in the Continental United States, 2004 - 2017 (Version 1.1: June 2022).

Groundwater data and age information from samples collected in Minnesota, 1996-1997

Recharge temperatures and groundwater-age models for the Paradox Valley alluvial aquifer, 2011, Colorado

Data for Groundwater age and susceptibility of south Atlantic and Gulf Coast principal aquifer of the contiguous United States

Coastal Groundwater Chemical Data from the North and South Shores of Long Island, New York

Data for assessing the susceptibility of groundwater used for drinking water supply from selected principal aquifers of the Western United States, 2004-2018

Data for assessing groundwater age and recharge rates using environmental tracers for groundwater basins in the Gilroy-Hollister area and northern San Joaquin Valley, California

Noble gas isotopes and lumped parameter model results for environmental tracer based groundwater ages, South Rim Grand Canyon, Arizona, USA