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.
A method for examining temporal changes in cyanobacterial harmful algal bloom spatial extent using satellite remote sensing: Harmful Algae
Rainfall-runoff of anthropogenic waste indicators from agricultural fields applied with municipal biosolids: Science of the Total Environment
Widespread occurrence and potential for biodegradation of bioactive contaminants in Congaree National Park, USA: Environmental Toxicology and Chemistry
Expanded target-chemical analysis reveals extensive mixed-organic-contaminant exposure in U.S. streams: Environmental Science and Technology
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)
Highlighting the complexities of a groundwater pilot study during an avian influenza outbreak--Methods, lessons Learned, and select contaminant results: Environmental Research
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.