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Environmental Health - Toxic Substances

The Toxic Substances Hydrology Program provides objective scientific information on environmental contamination to improve characterization and management of contaminated sites, to protect human and environmental health, and to reduce potential future contamination problems. Read more about the Toxics Program

Recent Science Features


New Publications
Dairy-impacted wastewater is a source of iodinated disinfection byproducts in the environment: Environmental Science and Technology Letters

Crude oil metabolites in groundwater at two spill sites: Groundwater

Establishing a pre-mining geochemical baseline at a uranium mine near Grand Canyon National Park, USA: Geoderma Regional

Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA: Environmental Toxicology and Chemistry

Dietary uptake of Cu sorbed to hydrous iron oxide is linked to cellular toxicity and feeding inhibition in a benthic grazer: Environmental Science and Technology

Observed decrease in atmospheric mercury explained by global decline in anthropogenic emissions: Proceedings of the National Academy of Sciences

More >

GeoHealth Newsletter
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The GeoHealth Newsletter
Volume 12, No. 2, 2015

GeoHealth is the U.S. Geological Survey's Environmental Health Newsletter.

Crosscutting Topics
Photo Gallery

USGS scientist lowering a water-quality sampler from a bridge.
USGS scientist lowering a water-quality sampler into the Iowa River near Marengo, Iowa (site ID 05453100), during the 1993 flood of the upper Mississippi River Watershed. The samples were analyzed for nutrients and pesticides -- from the Pesticide Contamination in Varied Pesticide-Use Settings Investigation

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