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.
Widespread occurrence and potential for biodegradation of bioactive contaminants in Congaree National Park, USA: Environmental Toxicology and Chemistry
A critical review of the postulated role of the non-essential amino acid, β-N-methylamino-l-alanine (BMAA) in neurodegenerative disease in humans: Journal of Toxicology and Environmental Health--Part B (Critical Reviews)
Expanded target-chemical analysis reveals extensive mixed-organic-contaminant exposure in U.S. streams: Environmental Science and Technology
Avian influenza virus RNA in groundwater wells supplying poultry farms affected by the 2015 influenza outbreak: Environmental Science and Technology Letters
Highlighting the complexities of a groundwater pilot study during an avian influenza outbreak--Methods, lessons Learned, and select contaminant results: Environmental Research
Nationwide reconnaissance of contaminants of emerging concern in source and treated drinking waters of the United States--Pharmaceuticals: 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.