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: 3783
PHREEQCI: A graphical user interface for the geochemical computer program PHREEQC
PhreeqcI is a Windows-based graphical user interface for the geochemical computer program PHREEQC. PhreeqcI provides the capability to generate and edit input data files, run simulations, and view text files containing simulation results, all within the framework of a single interface. PHREEQC is a multipurpose geochemical program that can perform speciation, inverse, reaction-path, and 1D advecti
Authors
Scott R. Charlton, Clifford L. Macklin, David L. Parkhurst
Agricultural chemicals in Iowa's ground water, 1982-95: What are the trends?
The Iowa Department of Natural Resources. Geological Survey Bureau: the University of Iowa Hygienic Laboratory; and the U.S. Geological Survey (USGS) have been working together to address this question. As part of the Iowa Ground-Water Monitoring Program (IGWM). water samples have been collected from selected Iowa municipal wells since 1982. An examination of this data identified two trends: (1) c
Authors
Dana W. Koplin, George Hallberg, D. A. Sneck-Fahrer, Robert Libra
Are walleye from Lake Roosevelt contaminated with mercury?
To find out, scientists from the U. S. Geological Survey (USGS) tested walleye and other sport fish from the upper Columbia River and Franklin D. Roosevelt Lake (Lake Roosevelt), the largest reservoir in Washington and a popular fishing spot.Findings:Walleye had higher concentrations of mercury than other sport fish.Larger walleye had higher mercury concentrations than smaller walleye.Mercury conc
Authors
Martha L. Erwin, Mark D. Munn
Studies of the San Francisco Bay, California, estuarine ecosystem regional monitoring program results, 1996
As part of a regional monitoring program, water samples were collected in the San Francisco Bay estuary during 21 cruises from January through December 1996. Conductivity, temperature, light attenuation, turbidity, oxygen, and in-vivo chlorophyll fluorescence were measured longitudinally and vertically in the main channel of the estuary from south of the Dumbarton Bridge in the southern part of th
Authors
Jelriza I. Baylosis, Jody L. Edmunds, Brian E. Cole, James E. Cloern
Spatial and temporal trends of trace metals in surface water, bed sediment, and biota of the upper Clark Fork Basin, Montana, 1985-95
No abstract available.
Authors
Michelle I. Hornberger, J. H. Lambing, S. N. Luoma, E.V. Axtmann
Geochemical and hydrologic considerations in remediating phosphorus-contaminated ground water in a sewage plume near Ashumet Pond, Cape Cod, Massachusetts
No abstract available.
Authors
D. A. Walter, D.R. LeBlanc
Relation of hydrogeologic characteristics to distribution of radioactivity in ground water, Newark Basin, New Jersey
The distribution of radioactivity in ground water in the Newark Basin is controlled by the lithology of the aquifer and the degree of contact between the water that flows through the fractured strata and the radioactive lithologic units. The primary water-bearing lithologic units of the Newark Basin that contain elevated levels of radioactivity are the arkosic sandstones of the Stockton Formation
Authors
Zoltan Szabo, Ticie A. Taylor, Dorothy F. Payne, Tamara Ivahnenko
Natural and mining-related sources of dissolved minerals during low flow in the Upper Animas River Basin, southwestern Colorado
As part of the Clean Water Act of 1972 (Public Law 92-500), all States are required to establish water-quality standards for every river basin in the State. During 1994, the Colorado Department of Public Health and Environment proposed to the Colorado Water Quality Control Commission (CWQCC) an aquatic-life standard of 225 µg/L (micrograms per liter) for the dissolved-zinc concentration in the Ani
Authors
Winfield G. Wright
Diagnosing the flood of 1997 in San Francisco Bay with observations and model results
No abstract available.
Authors
Noah Knowles, Daniel Cayan, Reginald J. Uncles, Lynn Ingram, Dave Peterson
Advective-transport observation (ADV) package, a computer program for adding advective-transport observations of steady-state flow fields to the three-dimensional ground-water-flow parameter-estimation model MODFLOWP
No abstract available.
Authors
Evan R. Anderman, Mary Catherine Hill
Hydrogeologic and water-quality data used to evaluate the effects of focused recharge on ground-water quality near Princeton, Minnesota, 1991-95
This study was part of the Management Systems Evaluation Area (MSEA) Program, a multi-scale, inter-agency initiative to evaluate the effects of agricultural systems on water quality in the midwest corn belt. The research was part of the U.S. Geological Survey Toxics Substances Hydrology Program. The research area was located in the Anoka Sand Plain about 5 kilometers southwest of Princeton, Minnes
Authors
G. N. Delin, M.K. Landon, K.J. Nelson, R. B. Wanty, R. W. Healy, H.W. Olson, J.K. Böhlke, B. R. Schroyer, P. D. Capel
Documentation of AIR2D, a computer program to simulate two-dimensional axisymmetric air flow in the unsaturated zone
No abstract available.
Authors
C.J. Joss, A. L. Baehr