Environmental Health - Toxic Substances Hydrology Program
The U.S. Geological Survey (USGS) Toxic Substances Hydrology Program has investigations focused on issues of national concern including contaminants associated with energy production, resource extraction, harmful algal blooms, home and personal-care product use and disposal, and agricultural production.
The USGS is providing the science to understand the occurrence and the potential effects of complex mixtures of both natural and anthropogenic chemicals in environmental waters.
The USGS is providing the science to understand the hydrological, geochemical, and microbiological processes controlling contaminant fate in fractured-rock aquifers.
The USGS is providing the science to understand the sources, fate, exposure, and potential effects of a broad range of chemical and microbial contaminants that we use in our everyday lives.
The USGS is providing the science to understand the long-term persistence and natural attenuation of petroleum hydrocarbon spills in soils and groundwater.
The USGS is providing the science to assess the environmental health risks associated with wastes from oil and gas development by characterizing waste materials, identifying potential environmental pathways, and evaluating the potential effects on organisms from exposure to unintended waste releases.
The USGS is providing the science to understand of processes controlling the migration and fate of contaminants in arid environments.
The USGS is providing the science to understand mercury sources, pathways, and key processes in the environment, with particular emphasis on understanding mercury methylation and accumulation in aquatic ecosystems.
The USGS is developing methods to measure new pesticides and their byproducts in environmental media, conducting studies on the fate of these chemicals, assessing exposure to understand potential effects on fish, wildlife, and human health.
The USGS is providing the science to understand the potential health risks of contaminants from wastewater plumes and spills that have persisted for decades in shallow groundwater.
The USGS is providing information and tools to support decisions related to management, risk assessment, remediation planning, and mitigation of the effects of hard-rock metal mining and uranium mining on watersheds and ecosystems.