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.
Are exposure predictions, used for the prioritisation of pharmaceuticals in the environment, fit for purpose?: Environmental Toxicology and Chemistry
Aquatic concentrations of chemical analytes compared to ecotoxicity estimates: Science of the Total Environment
Expanded target-chemical analysis reveals extensive mixed-organic-contaminant exposure in U.S. streams: Environmental Science and Technology
Nationwide reconnaissance of contaminants of emerging concern in source and treated drinking waters of the United States--Pharmaceuticals: Science of the Total Environment
An introduction to joint research by the USEPA and USGS on contaminants of emerging concern in source and treated drinking waters of the United States: Science of the Total Environment
The importance of quality control in validating concentrations of contaminants of emerging concern in source and treated drinking water samples: 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.