Office of Research and Development Publications

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The weathering release rate of base cations&nbsp;(BCw) from soil minerals is fundamentally important&nbsp;for terrestrial ecosystem growth, function, and sensitivityto acid deposition. Understanding BCw is necessary&nbsp;to reduce or prevent damage to acid-sensitive&nbsp;natural ...

This presentation is an overview of in situ thermal remediation technologies that are used to remediate organic contaminants from soils and groundwater. The thermal technologies to be covered include steam enhanced extraction, electrical resistance...

Eight software applications are compared for their performance in estimating the octanol-water partition coefficient (Kow), melting point, vapor pressure and water solubility for a dataset of polychlorinated biphenyls, polybrominated diphenyl ethers, polychlorinated dibenzodioxin...

Wetland ecosystems straddle both terrestrial and aquatic habitats, performing many ecological functions directly and indirectly benefitting humans. However, global wetland losses are substantial. Satellite remote sensing and classification informs wise wetland management and moni...

Globally, hydrologic modifications such as ditching and subsurface drainage have significantly reduced wetland water storage capacity (i.e., the volume of surface water a wetland can retain) and consequent wetland functions. While wetland area has been well documented across many...

Depressional wetlands of the extensive U.S. and Canadian Prairie Pothole Region afford numerous ecosystem processes that maintain healthy watershed functioning. However, these wetlands have been lost at a prodigious rate over past decades due to drainage for development, climate ...

High‐resolution mass spectrometry is advantageous for monitoring physiological impacts and contaminant biotransformation products in fish exposed to complex wastewater effluent. We evaluated this technique using skin mucus from male and female fathead minnows (Pimephales promelas...

Rivers in the arid Western United States face increasing influences from anthropogenic contaminants due to population growth, urbanization, and drought. To better understand and more effectively track the impacts of these contaminants, biologically-based monitoring tools are incr...

Pesticide use in agricultural areas requires the application of numerous chemicals to control target organisms, leaving non-target organisms at risk. The present study evaluates the hepatic metabolomic profile of one group of non-target organisms, amphibians, after exposure to a ...

Water resources support more than 60 million people in the Lower Mekong Basin (LMB) and are important for food security—especially rice production—and economic security. This study aims to quantify water yield under near- and long-term climate scenarios and assess the potential i...

Background: ATP binding cassette sub-family member 2 (ABCG2) is a well-defined efflux transporter found in various tissues. The role of ABCG2 during early embryonic development, however, is not established. Previous work suggests an association between exposure to xenobiotics tha...

The Adverse Outcome Pathway (AOP) framework describes the progression of a toxicity pathway from molecular perturbation to population-level outcome in a series of measurable, mechanistic responses. The controlled, computer-readable vocabulary that defines an AOP has the ability t...

The EPA Adverse Outcome Pathway Database (AOP-DB) is a database resource that aggregates association relationships between AOPs, genes, chemicals, diseases, pathways, species orthology information, ontologies. The AOP-DB frontend is a simple yet powerful user interface in the for...

In January 2018, EPA released the <em>IRIS Assessment Plan for Uranium (Oral Reference Dose) (Scoping and Problem Formulation Materials)</em>. An IRIS Assessment Plan (IAP) communicates to the public the plan for assessing each individual chemical and includes summary informatio...

In September 2017, EPA released the draft <em>IRIS Assessment Plan (IAP) for Ethylbenzene</em> for public review and comment. <!--This document was discussed at an EPA Science Advisory Board (SAB) Chemical Assessment Advisory Committee (CAAC) meeting on September 27-28, 2017. -->...

Effective monitoring and prediction of flood and drought events requires an improved understanding of how and why surface water expansion and contraction in response to climate varies across space. This paper sought to (1) quantify how interannual patterns of surface water expans...

The dependence of downstream waters on upstream ecosystems necessitates an improved understanding of watershed-scale hydrological interactions including connections between wetlands and streams. An evaluation of such connections is challenging when: (1) accurate and complete data...

Assessing the risk of bias (RoB) of individual studies is a critical part in determining the certainty of a body of evidence from non-randomized studies (NRS) that evaluate potential health effects due to environmental exposures. The recently released RoB in NRS of Interventions ...

Inland ports are vulnerable to damage or disruptions from extreme high and low water levels. Extreme water levels can cause periods of flooding or drought and may restrict or alter port operations and freight movement. Those vulnerabilities affect not only the port itself, but al...

Shabestar plain aquifer is located in the northeast of the hypersaline Urmia Lake, northwest Iran. There are two types of the aquifer in the plain: an unconfined aquifer that covers the plain and a confined aquifer that is just in the vicinity of the lake. In recent years, some o...

The role of sewer lines as preferential pathways for vapor intrusion is poorly understood. Although the importance of sewer lines for volatile organic compound (VOC) transport has been documented at a small number of sites with vapor intrusion, sewer lines are not routinely sampl...

Many regions in China experience air pollution episodes because of the rapid urbanization and industrialization over the past decades. Here we analyzed the effect of emission controls implemented during the G-20 2016 Hangzhou summit on air quality. Emission controls included a fo...

Two mesoscale circulations, the Sandhills circulation and the sea breeze, influence the initiation of deep convection over the Sandhills and the coast in the Carolinas during the summer months. The interaction of these two circulations causes additional convection in this coastal...

Geographically isolated wetlands, those entirely surrounded by uplands, provide numerous landscape-scale ecological functions, many of which are dependent on the degree to which they are hydrologically connected to nearby waters. There is a growing need for field-validated, lands...

In support of the Integrated Risk Information System (IRIS), the U.S. Environmental Protection Agency (EPA) completed an evaluation of the inhalation carcinogenicity of ethylene oxide (EtO) in December 2016. This article reviews key findings and scientific issues regarding the ca...