The U.S. Geological Survey Toxic Substances Hydrology Program provides objective scientific information on and the environmental pathways of chemical and microbial contaminant exposures. In collaboration with the Contaminant Biology Program as well as public health experts and others, the fundamental datasets and other knowledge products are developed to understand the implications of environmental contaminant exposures on the health of humans and other organisms.
The Program has several investigations of national concern.
Data from studies on the occurrence and distribution of environmental contaminants
Information on field methods, measuring environmental contaminants, models tools, geophysical methods, tracer test, and management and remediation alternatives.
Our photo gallery contains photos and scientific images from current and past Toxic Substances Hydrology Program investigations.
Effects of flow regime on metal concentrations and the attainment of water quality standards in a remediated stream reach, Butte, Montana: Environmental Science and Technology
Environmental origins of methylmercury accumulated in subarctic estuarine fish indicated by mercury stable isotopes: Environmental Science and Technology
Enabling science support for better decision-making when responding to chemical spills: Journal of Environmental Quality
Molecular-level evidence provided by ultrahigh resolution mass spectrometry for oil-derived DOC in groundwater at Bemidji, Minnesota: Journal of Hazardous Materials
Investigating dynamic sources of pharmaceuticals--Demographic and seasonal use are more important than down-the-drain disposal in wastewater effluent in a university city setting: Science of the Total Environment
Nitrapyrin in streams--The first study documenting off-field transport of a nitrogen stabilizer compound: Environmental Science and Technology Letters