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: 3785
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination of wastewater compounds by polystyrene-divinylbenzene solid-phase extraction and capillary-column gas chromatography/mass spectrometry Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination of wastewater compounds by polystyrene-divinylbenzene solid-phase extraction and capillary-column gas chromatography/mass spectrometry
A method for the determination of 67 compounds typically found in domestic and industrial wastewater is described. The method was developed in response to increasing concern over the impact of endocrine-disrupting chemicals in wastewater on aquatic organisms. This method also may be useful for evaluating the impact of combined sanitary and storm-sewer overflow on the water quality of...
Authors
Steven D. Zaugg, Steven G. Smith, Michael P. Schroeder, Larry B. Barber, Mark R. Burkhardt
Trace, minor and major element data for ground water near Fairbanks, Alaska, 1999-2000 Trace, minor and major element data for ground water near Fairbanks, Alaska, 1999-2000
No abstract available.
Authors
S. H. Mueller, R.J. Goldfarb, G. L. Farmer, R. Sanzolone, M. Adams, P. M. Theodorakos, S.A. Richmond, R. Blaine McCleskey
Chemical evolution of the Salton Sea, California: Nutrient and selenium dynamics Chemical evolution of the Salton Sea, California: Nutrient and selenium dynamics
The Salton Sea is a 1000-km2 terminal lake located in the desert area of southeastern California. This saline (∼44 000 mg l−1 dissolved solids) lake started as fresh water in 1905–07 by accidental flooding of the Colorado River, and it is maintained by agricultural runoff of irrigation water diverted from the Colorado River. The Salton Sea and surrounding wetlands have recently acquired
Authors
Roy A. Schroeder, William H. Orem, Yousif K. Kharaka
Chromium isotopes and the fate of hexavalent chromium in the environment Chromium isotopes and the fate of hexavalent chromium in the environment
Measurements of chromium (Cr) stable-isotope fractionation in laboratory experiments and natural waters show that lighter isotopes reacted preferentially during Cr(VI) reduction by magnetite and sediments. The 53Cr/52Cr ratio of the product was 3.4 ± 0.1 per mil less than that of the reactant.53Cr/52Cr shifts in water samples indicate the extent of reduction, a critical process that...
Authors
Andre S. Ellis, Thomas M. Johnson, Thomas D. Bullen
Chemistry of selected high-elevation lakes in seven national parks in the western United States Chemistry of selected high-elevation lakes in seven national parks in the western United States
A chemical survey of 69 high-altitude lakes in seven national parks in the western United States was conducted during the fallof 1999; the lakes were previously sampled during the fall of 1985, as part of the Western Lake Survey. Lakes in parks in the Sierra/southern Cascades (Lassen Volcanic, Yosemite, Sequoia/Kings Canyon National Parks) and in the southern RockyMountains (Rocky...
Authors
David W. Clow, Robert G. Striegl, Leora Nanus, M. Alisa Mast, Donald H. Campbell, David P. Krabbenhoft
Simulating solute transport across horizontal-flow barriers using the MODFLOW ground-water transport process Simulating solute transport across horizontal-flow barriers using the MODFLOW ground-water transport process
No abstract available.
Authors
G.Z. Hornberger, Leonard F. Konikow, P. T. Harte
In-situ evidence for uranium immobilization and remobilization In-situ evidence for uranium immobilization and remobilization
The in-situ microbial reduction and immobilization of uranium was assessed as a means of preventing the migration of this element in the terrestrial subsurface. Uranium immobilization (putatively identified as reduction) and microbial respiratory activities were evaluated in the presence of exogenous electron donors and acceptors with field push−pull tests using wells installed in an...
Authors
John M. Senko, Jonathan D. Istok, Joseph M. Suflita, Lee R. Krumholz
Linking diurnal cycles of river flow to interannual variations in climate Linking diurnal cycles of river flow to interannual variations in climate
Many rivers in the Western United States have diurnal variations exceeding 10% of their mean flow in the spring and summer months. The shape and timing of the diurnal cycle is influenced by an interplay of the snow, topography, vegetation, and meteorology in a basin, and the measured result differs between wet and dry years. The largest interannual differences occur during the latter...
Authors
Jessica D. Lundquist, Michael D. Dettinger
Aggregate stability and size distribution Aggregate stability and size distribution
No abstract available.
Authors
John R. Nimmo, K. Perkins
Steady-state centrifuge [simultaneous determination of water transmission and retention properties--direct methods--laboratory] Steady-state centrifuge [simultaneous determination of water transmission and retention properties--direct methods--laboratory]
No abstract available.
Authors
John R. Nimmo, K. Perkins, A. M. Lewis
Property-transfer models Property-transfer models
No abstract available.
Authors
R. Haverkamp, John R. Nimmo, P. Reggiani
Controlled liquid-volume [water retention and storage] Controlled liquid-volume [water retention and storage]
No abstract available.
Authors
K.A. Winfield, John R. Nimmo