Environmental Health - Toxic Substances Hydrology Program
Photos and images from an investigation of the occurrence and environmental effects of complex mixtures of both natural and man-made chemicals in environmental waters.
The USGS is investigating the hydrological, geochemical, and microbiological processes controlling contaminant fate in fractured-rock aquifers.
This gallery is on source-to-receptor research on a broad range of chemical and microbial contaminants including pharmaceuticals, personal care products, pathogens, antibiotic resistant genes, and natural toxins.
This investigation focuses on the long-term persistence in soils and groundwater of petroleum hydrocarbon spills, including crude oil and refined petroleum fuels.
Photos from a study that's assessing the environmental health risks associated with wastes from unconventional oil and gas development.
Photo and images of the USGS's research actives at the Amargosa Desert Research Site, Nevada.
This investigation focuses on understanding mercury sources, pathways and key processes in the environment, with particular emphasis on mercury methylation and accumulation in aquatic ecosystems.
A gallery of photos on studies on the fate of pesticides, and assessing their environmental exposure and potential effects on fish, wildlife, and human health.
The USGS is investigating a wastewater plume in a shallow aquifer near Cape Cod, Massachusetts, to increase the understanding of the physical, chemical, and microbiological processes that affect the fate and transport of contaminants in groundwater.
Photos from an investigation on the effects of hard-rock metal mining and uranium mining on watersheds and ecosystems.