56 datasets found
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Federal
Per- and polyfluoroalkyl substances (PFAS) results in tapwater samples, in select areas within the United States, beginning 2023 (ver. 2.0, June 2025)
Department of the Interior —
This data release provides concentration results for per- and polyfluoroalkyl substances (PFAS) collected by volunteer community members, in tapwater samples from 84... -
Federal
Assessing spatial variability of nutrients, phytoplankton and related water-quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2020-2021 High-resolution mapping surveys
Department of the Interior —
The dataset documents the spatial and temporal variability of nutrients, phytoplankton, and related water quality parameters at high spatial resolution in the... -
Federal
Assessment of nutrients and water-quality constituents in the North Delta during Yolo Bypass flooding events in March 2017
Department of the Interior —
The data release contains data for the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North... -
Federal
Domestic well locations and populations served in the contiguous U.S.: 2010, Road-enhanced method (REM) dataset
Department of the Interior —
The 1990 census was the last nationally consistent survey of a home’s source of water, and has not been surveyed since. The associated larger work presents a method... -
Federal
Groundwater-quality data in the Coachella Valley Domestic Supply Aquifer Study Unit, 2020: Results from the California GAMA Priority Basin Project (ver. 2.0, April 2022)
Department of the Interior —
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... -
Federal
Assessment of water-quality in the California Sacramento-San Joaquin Delta during a North Delta directed flow action: August - October 2018 (ver. 2.0, September 2021)
Department of the Interior —
This data release documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta in... -
Federal
Groundwater withdrawal zones for drinking water from the Mississippi River Valley alluvial aquifer and Mississippi embayment aquifers
Department of the Interior —
Of the approximately 6.6 million people living in the Mississippi embayment (MISE) region in the central United States, approximately 65 percent rely on groundwater... -
Federal
Public Supply Groundwater Fraction per County, 2015
Department of the Interior —
This dataset provides the calculated proportion of people using publicly supplied groundwater (PSGF) for each county in the conterminous U.S. The county boundaries... -
Federal
Data used to model and map arsenic concentration exceedances in private wells throughout the conterminous United States for human health studies
Department of the Interior —
This data release contains data used to develop models and maps that estimate probabilities of exceeding various thresholds of arsenic concentrations in private... -
Federal
Assessment of nutrients and water-quality constituents at the Sacramento-San Joaquin River Confluence during a phytoplankton bloom in July 2017
Department of the Interior —
This report documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta in the... -
Federal
Detections of Fecal Indicator Bacteria in Samples from the Madera/Chowchilla-Kings Domestic Aquifer Study unit, 2014
Department of the Interior —
These data describe microbiological analyses performed on groundwater samples from domestic drinking water supply collected from 42 groundwater wells in the Central... -
Federal
Concentrations and laboratory quality-assurance data for six unregulated contaminants measured in source and finished drinking-water samples collected from public water supply facilities throughout Minnesota by using ELISA and MS-based analytical methods
Department of the Interior —
The U.S. Geological Survey, in cooperation with the Minnesota Department of Health, conducted a study to determine the occurrence of six unregulated contaminants in... -
Federal
Public-supply water service areas within the conterminous United States, 2017
Department of the Interior —
This data release describes water service areas (WSA) for community water systems (CWS) within the conterminous United States, representing areas of active service... -
Federal
Water Quality data from the Providence Water Supply Board for tributary streams to the Scituate Reservoir, water year 2015
Department of the Interior —
Water-quality data were collected by the Providence Water Supply Board (PWSB) from tributaries in the Scituate Reservoir drainage area, October 2014 through September... -
Federal
Assessing spatial variability of nutrients and related water quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2018 High resolution mapping surveys (ver. 2.0, October 2023)
Department of the Interior —
The dataset documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta, Central... -
Federal
Concentrations of per- and polyfluoroalkyl substances (PFAS) in tapwater collected throughout the United States, 2021-22
Department of the Interior —
This dataset contains the concentration and quality assurance results for 34 per- and polyfluoroalkyl substances (PFAS). 409 residential and commercial tapwater... -
Federal
Domestic well locations and populations served in the contiguous U.S.: 1990, Road-enhanced method (REM) map.
Department of the Interior —
In this dataset we present two maps that estimate the location and population served by domestic wells in the contiguous United States. The first methodology, called... -
Federal
Characterization of water residence time, nutrients, phytoplankton and related water quality constituents in the Cache Slough Complex of the California Sacramento-San Joaquin Delta in 2017 and 2018
Department of the Interior —
Data was collected in the Cache Slough Complex located in the northern San Francisco Estuary to characterize water quality parameters at high spatial resolution. Data... -
Federal
Groundwater data, predictor variables, and rasters used for predicting the probability of high arsenic and high manganese in the Glacial Aquifer System, northern continental United States
Department of the Interior —
This data release contains input data used in model development and TIF raster files used to predict the probability of high arsenic (As) and high manganese (Mn) in... -
Federal
PFAS Reconnaissance Landscape Data
Department of the Interior —
This dataset consists of summary data for potential landscape sources of per- and poly-fluoroalkyl substances (PFAS). These summary items include facilities from the...
56 datasets found