The U.S. Geological Survey (USGS) Toxic Substances Hydrology Program develops and applies advanced analytical methods, field investigations, laboratory studies, and modeling capabilities to understand the sources, movement, and exposure pathways of chemical and microbial hazards in the environment. Program scientists collaborate with health scientists to understand the human health implications of exposures to chemical and microbial hazards.
Our photo gallery contains photos and scientific images from current and past Toxic Substances Hydrology Program investigations.
The Program has several investigations of national interest.
Information about the USGS Toxic Substances Hydrology Program.
Anoxic nitrate reduction coupled with iron oxidation and attenuation of dissolved arsenic and phosphate in a sand and gravel aquifer: Geochimica et Cosmochimica Acta
Uptake and disposition of select pharmaceuticals by bluegill exposed at constant concentrations in a flow-through aquatic exposure system: Environmental Science and Technology
Geochemical and hydrologic factors controlling subsurface transport of poly- and perfluoroalkyl substances, Cape Cod, Massachusetts: Environmental Science and Technology
Neonicotinoid insecticide removal by prairie strips in row-cropped watersheds with historical seed coating use: Agriculture, Ecosystems and Environment
Exploration of diffuse and discrete sources of acid mine drainage to a headwater Mountain stream in Colorado, USA: Mine Water and the Environment
Human health screening and public health significance of contaminants of emerging concern detected in public water supplies: Science of the Total Environment
The USGS Contaminant Biology Program develops and applies advanced laboratory methods and field investigations to understand potential biological health effects from exposures to chemical and microbial hazards in the environment.