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Background Hepatitis A virus (HAV) is a non-envelope, RNA virus that is transmitted through the fecal-oral route by direct contact or ingestion of contaminated food or water. HAV infections typically are diagnosed with the use of invasive and expensive serological assays.&nbsp;In...

The U.S. Environmental Protection Agency (EPA) is conducting a national stated preference study that seeks to quantify the non-use (existence) portion of total economic value of water quality policies across the conterminous US (CONUS). Previous work identified the ratio of obser...

Sediments are a major sink for microplastics (MP) and while methods for extracting and identifying MP in sediment have improved in recent years, these methods continue to be time and cost intensive and scientifically rigorous. The cost of specialized identification instrumentatio...

Spatially explicit&nbsp;ecological risk assessment&nbsp;(ERA) requires estimating the overlap between chemical and receptor distribution to evaluate the potential impacts of exposure on&nbsp;nontarget organisms. Pesticide use estimation at field level is prone to error due to inc...

Background Exposure to lead (Pb), arsenic (As) and copper (Cu) may cause significant health issues including harmful neurological effects, cancer or organ damage. Determination of human exposure-relevant concentrations of these metal(loids) in drinking water, therefore, is critic...

It is imperative to develop sampling and analytical methods to characterize FTOHs in indoor air for the development of mass transfer models to quantitatively predict FTOH emissions and transport for exposure assessment and risk management. This standard describes thermal desorpti...

Chemicals routinely monitored in drinking water represent only a fraction of all chemicals present, and some of these unmonitored chemicals may have human health implications. Since the chemical composition of drinking water can change daily, sampling methods that integrate the c...

From ancient philosophy to modern engineering and public health, water holds profound symbolism and necessity to life. Among old and new threats to water quality, lead contamination regained scientific and societal interest. This presentation will highlight two decades of researc...

Report on the Wide Area Demonstration (WAD) under the Analysis for Coastal Operational Resiliency (AnCOR) project. The AnCOR WAD was conducted from May 2 through May 27, 2022. The test venue was located at Fort A.P. Hill (FAPH), Bowling Green, VA. All work will was conducted at F...

Pollinators provide ecological services essential to maintaining our food supply and propagating natural habitats. However, populations are in serious decline due to causative environmental stressors including pesticides, pathogens, poor nutrition, and habitat loss. To better und...

Per- and polyfluorinated alkyl substances (PFAS) compose a group of thousands of synthetic chemicals with advantageous physical and chemical properties for consumer and industrial applications. PFAS have stain-resistant, water-resistant, non-stick, and lubricating properties and ...

Opportunistic premise plumbing pathogens (OPPPs) have been detected in buildings’ plumbing systems causing waterborne disease outbreaks in the United States. In this study, we monitored the occurrence of OPPPs along with free-living amoeba (FLA) and investigated the effects of re...

This paper describes the results of a four-day&nbsp;next generation emission measurement (NGEM) demonstration study conducted at a midwestern U.S. chemical facility that uses ethylene oxide (EtO), a hazardous air pollutant, in the production of industrial surfactants. The abstrac...

Quantifying atmospheric loadings of total phosphorus (TP) to freshwater environments is essential to improve understanding of its fate and transport, and to mitigate the effects of excessive levels in freshwater ecosystems. To date, atmospheric deposition of TP in the U.S. is poo...

The EPA Office of Water (OW) requested the EPA Office of Research and Development (ORD) conduct a water filter effectiveness study in Benton Harbor, Michigan, in response to lead concerns facing the residents of Benton Harbor. ORD designed a study to evaluate water filter effecti...

The effort with FY19 funding was for further experimentation and refinement of a numerical model with benzene, in support of contamination resulting for California wildfires. This year's request (and corresponding change in FY) is aimed at unstudied organics. This work is also pa...

The U.S. Environmental Protection Agency (EPA) strives to protect human health and the environment from adverse impacts resulting from incidents involving biological outbreaks or the intentional release of threat agents. Over the last 15 years several interagency efforts have bee...

Presentation for Chesapeake Bay Program Toxics Workgroup: Decision makers in the Columbia River Basin (CRB) are currently challenged with identifying and characterizing the extent of per- and polyfluoroalkyl substances (PFAS) contamination and human exposure to PFAS. This work ai...

Finished water storage facilities are tanks or reservoirs used to store water that will undergo no further treatment to reduce microbial pathogens except residual disinfections. Storage tanks are vulnerable to contamination, and excess water retention time may cause depletion of ...

The purpose of this research is to fundamentally investigate the measurement quality of condensable particulate matter (CPM) via both Method 202 and Other Test Method (OTM)-37 under controlled conditions by understanding both CPM formation mechanisms, and the dynamics that occur ...

Lake Superior stands as an exception to the other Laurentian Great Lakes when it comes to Dreissena mussels, with these invasive species established in the St. Louis River estuary (SLRE) since 1989 but seeming not to colonize the lake proper.&nbsp; In the last few years, however,...

In urban systems, a wide variety of processes (including increasing impervious surface cover, road salt application, sewage leaks, and weathering of the built environment) contribute to novel chemical cocktails made up of metals, salts, nutrients, and organic matter. Due to heter...

Biomonitoring at contaminated sites undergoing cleanup, including Superfund sites, often uses bioaccumulation of anthropogenic contaminants by field-deployed organisms as a metric of remedial effectiveness. Bioaccumulation studies are unable to assess the equilibrium status of th...

Chlorophyll a concentration serves as a proxy for phytoplankton abundance and an indicator of eutrophication. Monitoring of chlorophyll a is traditionally performed via in situ sampling, which tends to be costly and thus limited in both space and time. Publicly available satellit...

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