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.
Saharan dust nutrients promote Vibrio bloom formation in marine surface waters: Proceedings of the National Academy of Sciences
Wastewater disposal from unconventional oil and gas development degrades stream quality at a West Virginia injection facility: Environmental Science and Technology
Contamination with bacterial zoonotic pathogen genes in U.S. streams influenced by varying types of animal agriculture: Science of the Total Environment
Municipal solid waste landfills harbor distinct microbiomes: Frontiers in Microbiology
Cyanotoxins of inland lakes of the United States--Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007: Harmful Algae
Dairy-impacted wastewater is a source of iodinated disinfection byproducts in the environment: Environmental Science and Technology Letters