Toxic Substances Hydrology Program

Featured Science Activities

Our science is summarized in a series of feature articles that highlight recent U.S. Geological Survey (USGS) environmental health science activities. They are short summaries of peer-reviewed journal articles and USGS reports co-authored by our specialized teams of scientists.

Filter Total Items: 100
Date published: August 14, 2012
Status: Completed

Improvements in Wastewater Treatment Reduces Endocrine Disruption in Fish

A team of scientists from the U.S. Geological Survey (USGS), the University of Colorado, and the City of Boulder, Colorado, demonstrated that improvements to the treatment process at a wastewater treatment facility (WWTF) reduced the level of ...

Date published: December 22, 2011
Status: Completed

Evidence of Endocrine Disruption Unexpectedly Found in Minnesota Lakes

Endocrine disrupting chemicals and indicators of endocrine disruption were found in several Minnesota lakes with surrounding urban, residential, agricultural, and forested land uses. The lakes do not directly receive discharges from industries or wastewater-treatment plants; however, they are used for recreation, and they receive water from widely scattered sources. ...

Date published: August 3, 2010
Status: Completed

Hormones Degrade in the Environment!

In two separate studies, U.S. Geological Survey (USGS) scientists demonstrated that hormones such as estrogen can biodegrade in stream and groundwater environments. This is an important finding because the science, regulatory, and environmental communities have concerns about the environmental fate of endocrine-disrupting chemicals, such as hormones, in the human wastewaters discharged to the...

Date published: May 7, 2009
Status: Completed

Emerging Contaminants Targeted in a Reconnaissance of Ground Water and Untreated Drinking-Water Sources

Two national-scale reconnaissance studies recently conducted by the U.S. Geological Survey (USGS) were the first to collect baseline information on the environmental occurrence of pharmaceuticals, personal-care products, detergents, flame retardants, naturally occurring sterols, and other organic contaminants in ground water and untreated sources of drinking water in the United States. These...