Contaminant Biology

Human Exposure

Filter Total Items: 39
Date published: May 26, 2021
Status: Active

Ecotoxicology and Ecological Risks of Per‐ and Polyfluoroalkyl Substances

Ecotoxicology and ecological risks of per- and polyfluoroalkyl substances are summarized to highlight critical gaps and uncertainties, and to provide potential approaches to fill those gaps, including the development of targeted monitoring programs and cross-disciplinary approaches.

Date published: May 19, 2021
Status: Active

Nationwide Occurrence

A National-scale approach is used to examine and analyze per- and polyfluorinated alkyl substances (PFAS) prevalence and magnitude in watersheds and aquifers. As an initial step to fill known science gaps in the understanding of human and and wildlife exposure, the team will provide a snapshot of PFAS in drinking water paired with bioaccumulation in fish and wildlife near known or suspected...

Date published: May 19, 2021
Status: Active

Advanced PFAS Measurement Methods

Environmental Health Program scientists, in collaboration with other USGS scientists, are developing complementary field and laboratory methods and capabilities to detect and quantify a range of target and nontarget per- and polyfluorinated alkyl substances (PFAS) compounds and indicator compounds at low levels (parts per trillion) in a variety of environmental matrices. The PFAS Integrated...

Date published: April 15, 2021
Status: Completed

Bioaccumulation of Mercury in Fish Varied by Species and Location in the Chesapeake Bay Watershed—Summary of Existing Data and a Roadmap for Integrated Monitoring

Fish mercury data from State monitoring programs and research studies within the Chesapeake Bay were compiled and summarized to provide a comprehensive overview of the variation in fish mercury concentrations among species and habitats within the watershed. These data are put into context with existing health benchmarks for humans, birds, and fish. Scientists also provide a roadmap for an...

Date published: April 6, 2021
Status: Completed

Science to Understand Low-Level Exposures to Neonicotinoid Pesticides, their Metabolites, and Chlorinated Byproducts in Drinking Water

Scientists reported the discovery of three neonicotinoid pesticides in drinking water and their potential for transformation and removal during water treatment. The research provides new insights into the persistence of neonicotinoids and their potential for transformation during water treatment and distribution, while also identifying granulated activated carbon as a potentially effective...

Date published: June 11, 2020
Status: Completed

U.S. Geological Survey Microbiologist Selected as an American Society for Microbiology Distinguished Lecturer

Dale Warren Griffin, a U.S. Geological Survey (USGS) environmental public-health microbiologist, was selected as a Waksman Foundation Distinguished Lecturer for the 2020–22 American Society for Microbiology (ASM) Lecture Series. 

Date published: February 12, 2020
Status: Active

How are Mercury Sources Determined?

USGS scientists use innovative isotopic identification methods to determine mercury sources in air, water, sediments, and wildlife.

Date published: February 10, 2020
Status: Completed

Satellite Data Used to Estimate and Rank Cyanobacterial Bloom Magnitude in Florida and Ohio Lakes—Developing Tools to Protect Human and Wildlife Health from Cyanotoxin Exposure

Cyanobacterial bloom magnitude during 2003–11 was quantified and ranked in Florida and Ohio lakes with a newly developed modelling tool that allows for the use of multiple satellite data sources and user-defined thresholds. This tool was designed to identify the magnitude of algal blooms, but one metric alone cannot adequately represent the severity of a bloom of interest in terms of toxicity...

Contacts: Keith A Loftin, Ph.D., Sachi Mishra
Date published: May 7, 2019
Status: Active

Sublethal Effects of Contaminants in Aquatic Food Webs—Research Challenges and Considerations for Future Studies

U.S. Geological Survey (USGS) and academic scientists partnered to identify challenges and provide considerations for future scientific study designs to advance our understanding of the often subtle sublethal effects of contaminants on individuals, populations, communities, and entire aquatic food webs. 

Contacts: Kelly Smalling
Date published: February 25, 2019
Status: Completed

Roadmap to Understanding Factors Influencing Mercury Exposure and Adverse Health Effects

In a comprehensive overview, scientists explain that human and wildlife exposure and toxicological responses to mercury are dependent on factors that operate across global, individual, and molecular scales. They provide a roadmap for unified research to facilitate a better understanding of human and wildlife health risks from mercury exposure.

Date published: February 5, 2019
Status: Active

Novel Approach Improves Understanding of Virus Occurrence in Drinking Water

Waterborne viruses, one of the leading causes of gastrointestinal illnesses, were measured in United States drinking water sources and finished water. Scientists used a combination of measurement and statistical techniques to overcome limitations to quantifying these viruses, thus offering an enhanced method for virus monitoring.

Contacts: Edward Furlong, Dana W Kolpin, Susan T. Glassmeyer
Date published: September 26, 2018
Status: Active

Is Uranium in Water Resources near the Grand Canyon a Health Hazard?

The public is concerned that uranium in natural geologic formations, mine tailings, dusts, water, and other geologic materials can pose a health hazard to humans and wildlife.

Our specialized teams of hydrologists, chemists, and geologists working together at a field site in the Grand Canyon region of the United States have shown:

Elevated uranium concentrations (above the...