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Dive into our publications and explore the science from the Environmental Health Program (Toxic Substances Hydrology and Contaminant Biology).

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.

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USGS scientist sampling tap water from a public water supply

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January 23, 2003

Response to comment on "Pharmaceuticals, hormones, and other organic wastewater contaminants in U.S. streams, 1999-2000: A national reconnaissance"

Till (1) raised concerns that several aspects of how we handled the data in our study (2) may have caused unintended bias. First, Till (1) considers the “median detectable concentrations” listed in Table 1 (2) to be misleading because “higher median concentrations than is actually the case” were suggested. We interpret this concern raised by Till (1) to be that some readers may misinterpret our me

Authors

Dana W. Kolpin, Edward T. Furlong, Michael T. Meyer, E. Michael Thurman, Steven D. Zaugg, Larry B. Barber, Herbert T. Buxton

Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, Kansas Water Science Center, Central Midwest Water Science Center

January 1, 2003

Arsenic thermodynamic data and environmental geochemistry

No abstract available.

Authors

D. Kirk Nordstrom, D. Archer

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 2003

Potential for increased mercury accumulation in the estuary food web

Present concentrations of mercury in large portions of San Francisco Bay (Bay), the Sacramento-San Joaquin Delta (Delta), and the Sacramento and San Joaquin rivers are high enough to warrant concern for the health of humans and wildlife. Large scale tidal wetland restoration is currently under consideration as a means of increasing populations of fish species of concern. Tidal wetland restoration

Authors

Jay A. Davis, Donald Yee, Joshua N. Collins, Steven E. Schwarzbach, Samuel N. Luoma

Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, California Water Science Center

January 1, 2003

Interseasonal covariability of Sierra Nevada streamflow and San Francisco Bay salinity

The ecosystems of the San Francisco Bay estuary are influenced by the salinity of its waters, which in turn depends on flushing by freshwater inflows from the western slopes of the Sierra Nevada. Estimates of full-natural flows in eight major rivers that flush the Bay are analyzed here by extended empirical-orthogonal-function analyses to characterize distinct ‘modes’ of seasonal flow and runoff v

Authors

Michael D. Dettinger, Daniel R. Cayan

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 2003

Extreme acid mine drainage from a pyritic massive sulfide deposit, the Iron Mountain end-member

No abstract available.

Authors

Charles N. Alpers, D. Kirk Nordstrom, J. Spitzley

Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, California Water Science Center

January 1, 2003

Stable isotope applications in hydrologic studies

No abstract available.

Authors

Carol Kendall, D.H. Doctor

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 2003

Geochemistry of saline lakes

No abstract available.

Authors

B.F. Jones, D.M. Deocampo

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

January 1, 2003

Use of field-scale experiments and reactive transport modeling to evaluate remediation alternatives in streams affected by acid mine drainage

No abstract available.

Authors

B. A. Kimball, R.L. Runkel, Katherine Walton-Day

Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, Colorado Water Science Center

January 1, 2003

Arsenic in southeastern Michigan

Arsenic levels exceeding 10 μg/L are present in hundreds of private supply wells distributed over ten counties in eastern and southeastern Michigan. Most of these wells are completed in the Mississippian Marshall Sandstone, the principal bedrock aquifer in the region, or in Pleistocene glacial or Pennsylvanian bedrock aquifers. About 70% of ground water samples taken from more than 100 wells, have

Authors

Allan Kolker, Sheridan K. Haack, William F. Cannon, D.B. Westjohn, M.-J. Kim, Laurel G. Woodruff

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, Geology, Energy & Minerals Science Center, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center

January 1, 2003