The Toxic Substances Hydrology Program provides objective scientific information on environmental contamination to improve characterization and management of contaminated sites, to protect human and environmental health, and to reduce potential future contamination problems. Read more about the Toxics Program
The large white bottle contained a solution of sodium bromide, a conservative tracer, that was injected into the stream to characterize the hydrology of St. Kevin Gulch, Colo.Ņa stream impacted by acid mine drainage. The analysis of tracer injection experiments can yield a wealth of hydraulic information, for example information on time of travel, instantaneous discharge, temporal variation in discharge, and rates of ground-water inflow -- from the Hardrock Mining in Rocky Mountain Terrain -- Upper Arkansas River, Colorado Photo Gallery
Volatile organic compounds in the unsaturated zone from radioactive wastes: Baker, R.J., Andraski, B.J., Stonestrom, D.A., and Luo, W., Journal of Environmental Quality, doi:10.2135/jeq2011.0480 (IN PRESS).
Microbial degradation of chloroethenes in the fractured rock aquifer at NAWC Trenton under unamended and enhanced conditions: Bradley, P.M., U.S. Geological Survey Scientific Investigations Report (IN PRESS).
GeoHealth is the U.S. Geological Survey's Environmental Health Newsletter. The newsletter provides information on new USGS environmental health science activities and contributions related to safeguarding the quality of the environment, the health of wildlife and fish, and public health.
