Found 43 datasets matching filters.
-
Three wells in New Hampshire were sampled bimonthly over three years to evaluate the temporal variability of arsenic concentrations and groundwater age. All samples had measurable concentrations...
Search relevance: 1.00 | Views last month: 6 | Published on: 2026-03-03 -
Data from 38,105 wells were used to characterize fluoride occurrence in untreated United States groundwater. The data were retrieved from the U.S. Geological Survey (USGS) National Water...
Search relevance: 1.00 | Views last month: 4 | Published on: 2026-03-03 -
Water-quality data for groundwater samples collected from 4,824 sites, and ancillary data and information on sampled wells and principal aquifers, were used to assess the occurrence and...
Search relevance: 1.00 | Views last month: 3 | Published on: 2026-03-03 -
Concentrations of inorganic constituents, dissolved organic carbon (DOC), tritium, per- and polyfluoroalkyl substances (PFAS), volatile organic compounds (VOCs), and pharmaceuticals were measured...
Search relevance: 1.00 | Views last month: 3 | Published on: 2026-03-03 -
Data provided here describe geochemical correction of carbon-14 in dissolved inorganic carbon (DIC) for groundwater age dating. Datasets include major ion chemistry of groundwater samples, model...
Search relevance: 1.00 | Views last month: 2 | Published on: 2026-03-03 -
Groundwater samples were collected from 60 public supply wells in the Colorado Plateaus principal aquifer. Water quality evaluations of groundwater for drinking water at public supply depths were...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
Evaluating Decadal Changes in Groundwater Quality: Groundwater-quality data were collected from 5,000 wells between 1988-2001 (first decadal sampling event) by the National Water-Quality...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
This data release consists of data (in four tables) for assessing the time scales of arsenic variability in three production wells in New Hampshire; tables that describe the data fields in the...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
This data release includes grids representing the depth and thickness of drinking-water withdrawal zones, polygons of hydrogeologic settings, an inventory of sources of well construction data, and...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
Chemical data from 43,334 wells were used to examine the role of land surface-soil-aquifer connections in producing elevated manganese concentrations (>300 µg/L) in United States (U.S.)...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
In 2018, groundwater samples were collected from aquifers in the Williston Basin in parts of eastern Montana, western North Dakota, and northwestern South Dakota. This dataset includes...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
Residence time distribution (RTD) is a critically important characteristic of groundwater flow systems; however, it cannot be measured directly. RTD can be inferred from tracer data with...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
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...
Search relevance: 1.00 | Views last month: 1 | Published on: 2026-03-03 -
Groundwater-quality data were collected from 648 wells as part of the National Water-Quality Assessment Project of the U.S. Geological Survey National Water-Quality Program and are included in...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
This data release includes tables and time-series plots of results for volatile organic compounds (VOCs) analyzed in samples of groundwater used for public supply that were collected by the USGS...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
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...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
Groundwater chemistry data used for assessing the lead (Pb) solubility potential of untreated groundwater of the United States were compiled from the USGS National Water Information System (NWIS)...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
This data set includes results for hormone and pharmaceutical compounds analyzed from 2012 through 2016 in laboratory quality-control samples that are associated with environmental samples...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
Data used to model and map pH and redox conditions in groundwater in the Northern Atlantic Coastal Plain aquifer system, eastern USA, are documented in this data release. The models use as input...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03 -
Evaluating Decadal Changes in Groundwater Quality: Groundwater-quality data were collected from 5,000 wells between 1988-2001 (first decadal sampling event) by the National Water-Quality...
Search relevance: 1.00 | Views last month: 0 | Published on: 2026-03-03
