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.
Exploration of diffuse and discrete sources of acid mine drainage to a headwater Mountain stream in Colorado, USA: Mine Water and the Environment
Expanded target-chemical analysis reveals extensive mixed-organic-contaminant exposure in U.S. streams: Environmental Science and Technology
Stable isotopic composition of perchlorate and nitrate accumulated in plants--Hydroponic experiments and field data: Science of the Total Environment
Organic geochemistry and toxicology of a stream impacted by unconventional oil and gas wastewater disposal operations: Applied Geochemistry
Geochemical and hydrologic factors controlling subsurface transport of poly- and perfluoroalkyl substances, Cape Cod, Massachusetts: Environmental Science and Technology
Shifts in microbial community structure and function in surface waters impacted by unconventional oil and gas wastewater revealed by metagenomics: 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.