Publications
Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).
GeoHEALTH-USGS Newsletter
GeoHEALTH-USGS Newsletter
The GeoHEALTH–USGS Newsletter—published since 2004—provides information on USGS science activities pertinent to safeguarding the health of fish, wildlife, domesticated animals, and people from environmental exposures to contaminants and pathogens.
Featured Science Activities
Featured Science Activities
Lean about our Featured Science Activities through our pages that highlight science studies, publications, and results.
Filter Total Items: 3787
Particulate organic matter in the San Francisco Bay estuary, California: Chemical indicators of its origin and assimilation into the benthic food web
No abstract available.
Authors
J. E. Cloern, E. A. Canuel, S.M. Wienke
Trace metals in clams (Macoma balthica) and sediments at the Palo Alto mudflat in south San Francisco Bay: June, 1993-May, 1993
No abstract available.
Authors
S. N. Luoma, D.J. Cain, C. L. Brown, Michelle I. Hornberger
Ground-water quality at the Management Systems Evaluation Area (MSEA) near Princeton, Minnesota, 1991
The northern cornbelt sand-plains Management Systems Evaluation Area (MSEA) program is a multiagency, multistate initiative to evaluate the effects of modified and prevailing fanning systems on water quality in a sand-plain area in Minnesota and at satellite areas in North and South Dakota, and Wisconsin (Delin and others, 1992). The primary objective of the northern cornbelt sand-plains MSEA is t
Authors
Matthew K. Landon, Geoffrey N. Delin, J.A. Lamb, Laodong Guo
Data on chlorofluorocarbons (CCl3F and CCl2F2) as dating tools and hydrologic tracers in shallow ground water of the Delmarva Peninsula
No abstract available.
Authors
Niel Plummer, S.A. Dunkle, Eurybiades Busenberg
Ground-water-quality assessment of the Central Oklahoma Aquifer, Oklahoma: Geochemical and geohydrologic investigations
The National Water-Quality Assessment pilot project for the Central Oklahoma aquifer examined the chemical and isotopic composition of ground water, the abundances and textures of minerals in core samples, and water levels and hydraulic properties in the flow system to identify geochemical reactions occurring in the aquifer and rates and directions of ground-water flow. The aquifer underlies 3,000
Authors
David L. Parkhurst, Scott C. Christenson, George N. Breit
A dual drawworks controller for borehole tomography
No abstract available.
Authors
T.P. Grover, R.P. Kipfinger, D.L. Wright
Coupling solid-phase extraction and enzyme-linked immunosorbent assay for ultratrace determination of herbicides in pristine water
No abstract available.
Authors
D.S. Aga, E.M. Thurman
Application of mixed-mode, solid-phase extraction in environmental and clinical chemistry. Combining hydrogen-bonding, cation-exchange and Van der Waals interactions
Silica- and styrene-divinylbenzene-based mixed-mode resins that contain C8, C18 and sulphonated cation-exchange groups were compared for their efficiency in isolation of neutral triazine compounds from water and of the basic drug, benzoylecgonine, from urine. The triazine compounds were isolated by a combination of Van der Waals and hydrogen-bonding interactions, and benzoylecgonine was isolated b
Authors
M. S. Mills, E.M. Thurman, M.J. Pedersen
Hydrogeologic, water-quality, and land-use data for the reconnaissance of herbicides and nitrate in near-surface aquifers of the Midcontinental United States, 1991
Water samples were collected during the spring and summer of 1991 from 303 wells penetrating near-surface unconsolidated and bedrock aquifers of the midcontinental United States. Samples were analyzed for 11 herbicides, 2 dealkylated atrazine metabolites, and 4 nutrients. Specific conductance, pH, and dissolved-oxygen concentrations of the ground water were measured onsite. Ancillary data on well
Authors
D.W. Kolpin, M. R. Burkart, E.M. Thurman
Reconnaissance data for selected herbicides, two atrazine metabolities, and nitrate in surface water of the Midwestern United States, 1989-90
Water-quality data were collected from 147 rivers and streams during 1989-90 to assess selected preemergent herbicides, two atrazine metabolites, and nitrate in 10 Midwestern States. This report includes a description of the sampling design, data collection techniques, laboratory and analytical methods, and a compilation of constituent concentrations and quality-assurance data. All water samples w
Authors
E.A. Scribner, E.M. Thurman, D. A. Goolsby, M. T. Meyer, M. S. Mills, M.L. Pomes
Automated solid-phase extraction of herbicides from water for gas chromatographic-mass spectrometric analysis
An automated solid-phase extraction (SPE) method was developed for the pre-concentration of chloroacetanilide and triazine herbicides, and two triazine metabolites from 100-ml water samples. Breakthrough experiments for the C18 SPE cartridge show that the two triazine metabolites are not fully retained and that increasing flow-rate decreases their retention. Standard curve r2 values of 0.998–1.000
Authors
M. T. Meyer, M. S. Mills, E.M. Thurman
Agricultural chemical interchange between ground water and surface water, Cedar River basin, Iowa and Minnesota: A study description
A review of the data collected in the Cedar River basin, Iowa and Minnesota, indicates that atrazine is consistently detected in the main-stem river at concentrations greater than 0.10 microgram per liter even during periods of extended base flow. The primary source of atrazine in the river during these periods of base flow is not known. This study is designed to determine how atrazine and other a
Authors
P. J. Squillace, M. J. Liszewski, E.M. Thurman