Laura M. Bexfield
Hydrologist, New Mexico Water Science Center
Science and Products
Filter Total Items: 14
Replicate surface water and groundwater data analyzed by USGS National Water Quality Laboratory schedule 2437, 2013-15
Replicate water-quality samples are collected and prepared in the field and analyzed in the laboratory in identical ways so that they are considered to be the same in composition and analysis (Mueller and others, 2015). This data set includes one table of duplicate National Water-Quality Assessment Project (NAWQA) surface water and groundwater samples collected between October 1, 2012 and Septembe
Groundwater Quality Data from the National Water Quality Assessment Project, May 2012 through December 2013
Groundwater-quality data were collected from 748 wells as part of the National Water-Quality Assessment Project of the U.S. Geological Survey National Water-Quality Program from May 2012 through December 2013. 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, whi
Filter Total Items: 44
Data analysis considerations for pesticides determined by National Water Quality Laboratory schedule 2437
In 2013, the U.S. Geological Survey National Water Quality Laboratory (NWQL) made a new method available for the analysis of pesticides in filtered water samples: laboratory schedule 2437. Schedule 2437 is an improvement on previous analytical methods because it determines the concentrations of 225 fungicides, herbicides, insecticides, and associated degradates in one method at similar or lower co
Authors
Megan E. Shoda, Lisa H. Nowell, Wesley W. Stone, Mark W. Sandstrom, Laura M. Bexfield
Groundwater quality in the Rio Grande aquifer system, southwestern United States
Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the U.S. Geological Survey (USGS) National Water-Quality Assessment (NAWQA) Project assesses groundwater quality in aquifers that are important sources of drinking water (Burow and Belitz, 2014). The Rio Grande aquifer system constitutes one of the important areas being evaluated.
Authors
MaryLynn Musgrove, Laura M. Bexfield
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 are used to assess the quality of groundwater used for public water supply; land-use study ne
Authors
Terri Arnold, Laura M. Bexfield, MaryLynn Musgrove, Bruce D. Lindsey, Paul E. Stackelberg, Jeannie R. B. Barlow, Leslie A. DeSimone, Justin T. Kulongoski, James A. Kingsbury, Joseph D. Ayotte, Brandon J. Fleming, Kenneth Belitz
Groundwater quality data from the National Water-Quality Assessment Project, May 2012 through December 2013
Groundwater-quality data were collected from 748 wells as part of the National Water-Quality Assessment Project of the U.S. Geological Survey National Water-Quality Program from May 2012 through December 2013. 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, whi
Authors
Terri Arnold, Leslie A. DeSimone, Laura M. Bexfield, Bruce D. Lindsey, Jeannie R. B. Barlow, Justin T. Kulongoski, MaryLynn Musgrove, James A. Kingsbury, Kenneth Belitz
Global patterns and environmental controls of perchlorate and nitrate co-occurrence in arid and semi-arid environments
Natural perchlorate (ClO4−) is of increasing interest due to its wide-spread occurrence on Earth and Mars, yet little information exists on the relative abundance of ClO4− compared to other major anions, its stability, or long-term variations in production that may impact the observed distributions. Our objectives were to evaluate the occurrence and fate of ClO4− in groundwater and soils/caliche i
Authors
W Andrew Jackson, John K. Böhlke, Brian J. Andraski, Lynne S. Fahlquist, Laura M. Bexfield, Frank D. Eckardt, John B. Gates, Alfonso F. Davila, Christopher P. McKay, Balaji Rao, Ritesh Sevanthi, Srinath Rajagopalan, Nubia Estrada, Neil C. Sturchio, Paul B. Hatzinger, Todd A. Anderson, Greta J. Orris, Julio L. Betancourt, David A. Stonestrom, Claudio Latorre, Yanhe Li, Gregory J. Harvey
The quality of our Nation's waters: Water quality in basin-fill aquifers of the southwestern United States: Arizona, California, Colorado, Nevada, New Mexico, and Utah, 1993-2009
The Southwest Principal Aquifers consist of many basin-fill aquifers in California, Nevada, Utah, Arizona, New Mexico, and Colorado. Demands for irrigation and drinking water have substantially increased groundwater withdrawals and irrigation return flow to some of these aquifers. These changes have increased the movement of contaminants from geologic and human sources to depths used to supply dri
Authors
Susan A. Thiros, Angela P. Paul, Laura M. Bexfield, David W. Anning
Effects of seasonal operation on the quality of water produced by public-supply wells
Seasonal variability in groundwater pumping is common in many places, but resulting effects of seasonal pumping stress on the quality of water produced by public-supply wells are not thoroughly understood. Analysis of historical water-quality samples from public-supply wells completed in deep basin-fill aquifers in Modesto, California (134 wells) and Albuquerque, New Mexico (95 wells) indicates th
Authors
Laura M. Bexfield, Bryant C. Jurgens
A ternary age-mixing model to explain contaminant occurrence in a deep supply well
The age distribution of water from a public-supply well in a deep alluvial aquifer was estimated and used to help explain arsenic variability in the water. The age distribution was computed using a ternary mixing model that combines three lumped parameter models of advection-dispersion transport of environmental tracers, which represent relatively recent recharge (post- 1950s) containing volatile
Authors
Bryant C. Jurgens, Laura M. Bexfield, Sandra M. Eberts
Predicted nitrate and arsenic concentrations in basin-fill aquifers of the Southwestern United States
The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) is conducting a regional analysis of water quality in the principal aquifer systems across the United States. The Southwest Principal Aquifers (SWPA) study is building a better understanding of the susceptibility and vulnerability of basin-fill aquifers in the region to groundwater contamination by synthesiz
Authors
David W. Anning, Angela P. Paul, Tim S. McKinney, Jena M. Huntington, Laura M. Bexfield, Susan A. Thiros
Hydrogeology, water chemistry, and transport processes in the zone of contribution of a public-supply well in Albuquerque, New Mexico, 2007-9
The National Water-Quality Assessment Program (NAWQA) of the U.S. Geological Survey began a series of groundwater studies in 2001 in representative aquifers across the Nation in order to increase understanding of the factors that affect transport of anthropogenic and natural contaminants (TANC) to public-supply wells. One of 10 regional-scale TANC studies was conducted in the Middle Rio Grande Bas
Authors
Laura M. Bexfield, Bryant C. Jurgens, Dianna M. Crilley, Scott C. Christenson
Assessing the vulnerability of public-supply wells to contamination: Rio Grande aquifer system in Albuquerque, New Mexico
This fact sheet highlights findings from the vulnerability study of a public-supply well in Albuquerque, New Mexico (hereafter referred to as “the study well”). The study well produces about 3,000 gallons of water per minute from the Rio Grande aquifer system. Water samples were collected at the study well, at two other nearby public-supply wells, and at monitoring wells installed in or near the s
Authors
Martha L. Jagucki, Laura M. Bexfield, Charles E. Heywood, Sandra M. Eberts
Effects of natural and human factors on groundwater quality of basin-fill aquifers in the southwestern United States: Conceptual models for selected contaminants
As part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program, the Southwest Principal Aquifers (SWPA) study is building a better understanding of the factors that affect water quality in basin-fill aquifers in the Southwestern United States. The SWPA study area includes four principal aquifers of the United States: the Basin and Range basin-fill aquifers in California, N
Authors
Laura M. Bexfield, Susan A. Thiros, David W. Anning, Jena M. Huntington, Tim S. McKinney
Science and Products
Filter Total Items: 14
Replicate surface water and groundwater data analyzed by USGS National Water Quality Laboratory schedule 2437, 2013-15
Replicate water-quality samples are collected and prepared in the field and analyzed in the laboratory in identical ways so that they are considered to be the same in composition and analysis (Mueller and others, 2015). This data set includes one table of duplicate National Water-Quality Assessment Project (NAWQA) surface water and groundwater samples collected between October 1, 2012 and Septembe
Groundwater Quality Data from the National Water Quality Assessment Project, May 2012 through December 2013
Groundwater-quality data were collected from 748 wells as part of the National Water-Quality Assessment Project of the U.S. Geological Survey National Water-Quality Program from May 2012 through December 2013. 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, whi
Filter Total Items: 44
Data analysis considerations for pesticides determined by National Water Quality Laboratory schedule 2437
In 2013, the U.S. Geological Survey National Water Quality Laboratory (NWQL) made a new method available for the analysis of pesticides in filtered water samples: laboratory schedule 2437. Schedule 2437 is an improvement on previous analytical methods because it determines the concentrations of 225 fungicides, herbicides, insecticides, and associated degradates in one method at similar or lower co
Authors
Megan E. Shoda, Lisa H. Nowell, Wesley W. Stone, Mark W. Sandstrom, Laura M. Bexfield
Groundwater quality in the Rio Grande aquifer system, southwestern United States
Groundwater provides nearly 50 percent of the Nation’s drinking water. To help protect this vital resource, the U.S. Geological Survey (USGS) National Water-Quality Assessment (NAWQA) Project assesses groundwater quality in aquifers that are important sources of drinking water (Burow and Belitz, 2014). The Rio Grande aquifer system constitutes one of the important areas being evaluated.
Authors
MaryLynn Musgrove, Laura M. Bexfield
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 are used to assess the quality of groundwater used for public water supply; land-use study ne
Authors
Terri Arnold, Laura M. Bexfield, MaryLynn Musgrove, Bruce D. Lindsey, Paul E. Stackelberg, Jeannie R. B. Barlow, Leslie A. DeSimone, Justin T. Kulongoski, James A. Kingsbury, Joseph D. Ayotte, Brandon J. Fleming, Kenneth Belitz
Groundwater quality data from the National Water-Quality Assessment Project, May 2012 through December 2013
Groundwater-quality data were collected from 748 wells as part of the National Water-Quality Assessment Project of the U.S. Geological Survey National Water-Quality Program from May 2012 through December 2013. 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, whi
Authors
Terri Arnold, Leslie A. DeSimone, Laura M. Bexfield, Bruce D. Lindsey, Jeannie R. B. Barlow, Justin T. Kulongoski, MaryLynn Musgrove, James A. Kingsbury, Kenneth Belitz
Global patterns and environmental controls of perchlorate and nitrate co-occurrence in arid and semi-arid environments
Natural perchlorate (ClO4−) is of increasing interest due to its wide-spread occurrence on Earth and Mars, yet little information exists on the relative abundance of ClO4− compared to other major anions, its stability, or long-term variations in production that may impact the observed distributions. Our objectives were to evaluate the occurrence and fate of ClO4− in groundwater and soils/caliche i
Authors
W Andrew Jackson, John K. Böhlke, Brian J. Andraski, Lynne S. Fahlquist, Laura M. Bexfield, Frank D. Eckardt, John B. Gates, Alfonso F. Davila, Christopher P. McKay, Balaji Rao, Ritesh Sevanthi, Srinath Rajagopalan, Nubia Estrada, Neil C. Sturchio, Paul B. Hatzinger, Todd A. Anderson, Greta J. Orris, Julio L. Betancourt, David A. Stonestrom, Claudio Latorre, Yanhe Li, Gregory J. Harvey
The quality of our Nation's waters: Water quality in basin-fill aquifers of the southwestern United States: Arizona, California, Colorado, Nevada, New Mexico, and Utah, 1993-2009
The Southwest Principal Aquifers consist of many basin-fill aquifers in California, Nevada, Utah, Arizona, New Mexico, and Colorado. Demands for irrigation and drinking water have substantially increased groundwater withdrawals and irrigation return flow to some of these aquifers. These changes have increased the movement of contaminants from geologic and human sources to depths used to supply dri
Authors
Susan A. Thiros, Angela P. Paul, Laura M. Bexfield, David W. Anning
Effects of seasonal operation on the quality of water produced by public-supply wells
Seasonal variability in groundwater pumping is common in many places, but resulting effects of seasonal pumping stress on the quality of water produced by public-supply wells are not thoroughly understood. Analysis of historical water-quality samples from public-supply wells completed in deep basin-fill aquifers in Modesto, California (134 wells) and Albuquerque, New Mexico (95 wells) indicates th
Authors
Laura M. Bexfield, Bryant C. Jurgens
A ternary age-mixing model to explain contaminant occurrence in a deep supply well
The age distribution of water from a public-supply well in a deep alluvial aquifer was estimated and used to help explain arsenic variability in the water. The age distribution was computed using a ternary mixing model that combines three lumped parameter models of advection-dispersion transport of environmental tracers, which represent relatively recent recharge (post- 1950s) containing volatile
Authors
Bryant C. Jurgens, Laura M. Bexfield, Sandra M. Eberts
Predicted nitrate and arsenic concentrations in basin-fill aquifers of the Southwestern United States
The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) is conducting a regional analysis of water quality in the principal aquifer systems across the United States. The Southwest Principal Aquifers (SWPA) study is building a better understanding of the susceptibility and vulnerability of basin-fill aquifers in the region to groundwater contamination by synthesiz
Authors
David W. Anning, Angela P. Paul, Tim S. McKinney, Jena M. Huntington, Laura M. Bexfield, Susan A. Thiros
Hydrogeology, water chemistry, and transport processes in the zone of contribution of a public-supply well in Albuquerque, New Mexico, 2007-9
The National Water-Quality Assessment Program (NAWQA) of the U.S. Geological Survey began a series of groundwater studies in 2001 in representative aquifers across the Nation in order to increase understanding of the factors that affect transport of anthropogenic and natural contaminants (TANC) to public-supply wells. One of 10 regional-scale TANC studies was conducted in the Middle Rio Grande Bas
Authors
Laura M. Bexfield, Bryant C. Jurgens, Dianna M. Crilley, Scott C. Christenson
Assessing the vulnerability of public-supply wells to contamination: Rio Grande aquifer system in Albuquerque, New Mexico
This fact sheet highlights findings from the vulnerability study of a public-supply well in Albuquerque, New Mexico (hereafter referred to as “the study well”). The study well produces about 3,000 gallons of water per minute from the Rio Grande aquifer system. Water samples were collected at the study well, at two other nearby public-supply wells, and at monitoring wells installed in or near the s
Authors
Martha L. Jagucki, Laura M. Bexfield, Charles E. Heywood, Sandra M. Eberts
Effects of natural and human factors on groundwater quality of basin-fill aquifers in the southwestern United States: Conceptual models for selected contaminants
As part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program, the Southwest Principal Aquifers (SWPA) study is building a better understanding of the factors that affect water quality in basin-fill aquifers in the Southwestern United States. The SWPA study area includes four principal aquifers of the United States: the Basin and Range basin-fill aquifers in California, N
Authors
Laura M. Bexfield, Susan A. Thiros, David W. Anning, Jena M. Huntington, Tim S. McKinney