Person

Joseph D Ayotte

Supervisory Hydrologist

Email: jayotte@usgs.gov
Office Phone: 603-226-7810
Fax: 603-226-7894
ORCID: 0000-0002-1892-2738

Location
331 Commerce Way
Suite #2
Pembroke , NH 03275-3718
US

10 items:

Probability of arsenic concentrations greater than 10 micrograms per liter in groundwater used by domestic wells in the United States 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 at the county, state, and national scales. Variables representing geologic sources, geochemical, hydrologic, and physical features were among the significant predictors of high arsenic. For U.S. Census blocks, the mean probability of arsenic > 10 µg/L was multiplied by the population using domestic wells to estimate the potential high-arsenic domestic-well population. Approximately 44.1 M people in the U.S. use water from domestic wells. The population in the conterminous U.S. using water from domestic wells with predicted... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arsenic, Conterminous United States, Domestic wells, Logistic models, Water quality, All tags... Water usage, Fewer tags
Statewide survey of shallow soil concentrations of per- and polyfluoroalkyl substances (PFAS) and related chemical and physical data across New Hampshire, 2021 Per- and polyfluoroalkyl substances (PFAS) and related chemical and physical data are presented from 100 shallow soil sampling locations within the State of New Hampshire. Sites were randomly determined through an equal-area grid approach (Scott, 1990) targeting undisturbed areas, which included lands classified by the 2016 National Land Cover Database (Dewitz, 2019) as forested, shrubland, scrubland, grassland, herbaceous, wetlands, or barren land. Sampling sites were located at the closest point to the random location identified, where access and permission were available. To limit the potential for sampling results to be influenced by local releases of PFAS, a 500-meter buffer around parcels associated with known... Categories: Data; Tags: Environmental Health, New Hampshire, PFAS, Soil Sciences, USGS Science Data Catalog (SDC), All tags...
Concentrations of arsenic in water from public-supply and domestic wells in New Hampshire (2004-2006) Groundwater samples from public and private drinking water wells throughout the state of New Hampshire were analyzed for total Arsenic (As). Samples were collected after pH, specific conductivity, dissolved oxygen, and water temperature had met stabilization criteria as outlined in the USGS National Field Manual (United States Geological Survey 2005). The As analyses were carried out in the geochemistry laboratory in the Department of Earth Sciences at the University of New Hampshire (UNH). Not including replicate analysis, a total of 527 samples were analyzed via a hydride generator-inductively coupled plasma mass spectrometer (HG-ICP-MS) using a Cetac HGX-200 plumbed into a Nu Instruments Attom high-resolution... Categories: Data; Tags: Arsenic, Drinking Water, Groundwater, Hydrogeology, New Hampshire, All tags...
Variables used as input to a logistic regression model to estimate high-arsenic domestic-well population in the conterminous United States, 1970 through 2013 Approximately 44.1 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 Drinking Water Act, there is no comprehensive national program for testing domestic well water to ensure that is it safe to drink. There are many activities, e.g., resource extraction, climate change-induced drought, and changes in land use patterns that could potentially affect the quality of the ground water source for domestic wells. The Health Studies Branch (HSB) of the National Center for Environmental Health, Centers for Disease Control and Prevention, created a Clean Water for Health Program to help address domestic... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arsenic, Conterminous United States, Domestic wells, Logistic models, Water quality, All tags... Water usage, Fewer tags
Datasets from Groundwater-Quality Data from the National Water-Quality Assessment Project, January through December 2014 and Select Quality-Control Data from May 2012 through December 2014 Groundwater-quality data were collected from 559 wells as part of the National Water-Quality Assessment Project of the U.S. Geological Survey National Water-Quality Program from January through December 2014. The data were collected from four types of well networks: principal aquifer study networks, which assess the quality of groundwater used for public water supply; land-use study networks, which assess land-use effects on shallow groundwater quality; major aquifer study networks, which assess the quality of groundwater used for domestic supply; and enhanced trends networks, which evaluate the time scales during which groundwater quality changes. Groundwater samples were analyzed for a large number of water-quality... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Hydrogeology, NAWQA, National Water Quality Program, USGS Science Data Catalog (SDC), United States, All tags...

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