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We developed and then used a flowchart to identify example specific conductivity (SC) hazardous concentration (HC05) values for 63 of the 85 Level III ecoregions in the conterminous United States. Using the flowchart, we compared SC HC05 values estimated at the mean regression l...

The Adverse Outcome Pathway (AOP) framework represents an ideal tool for integrating diverse data relating chemical exposures to adverse outcomes. Glucocorticoid signaling is tightly controlled and numerous adverse health outcomes have been associated with either elevation or sup...

The Nooksack-Fraser transboundary area is home to communities with a strong base in farming, fisheries and outdoor recreation. A goal of the Nooksack-Fraser Transboundary Nitrogen (NFT-N) project is to determine the sources and fates of N in the watershed using data on energy us...

Indicators of a stream&rsquo;s ability to remove nutrients provide insights on watershed integrity and stream habitat characteristics that are needed to help managers to restore stream ecosystem services. We used the Tracer Additon Spiraling Characterization Curve (TASCC) to mea...

Indicators of a stream&rsquo;s ability to remove nutrients provide insights on watershed integrity and managers&rsquo; ability to restore ecosystem services based on specific characteristics of stream habitat. We used the Tracer Additon Spiraling Characterization Curve (TASCC) t...

This paper reports on the pilot testing of a new bioassay platform that monitors expression of 1600 genes in zebrafish embryos exposed to either single chemicals or complex water samples. The method provides a more cost effective, high throughput means to broadly evaluate the pot...

Water quality degradation is a chronic problem which influences the resilience of a social-ecological system differently than acute disturbances, such as disease or storms. Recognizing this, we developed a tailored resilience framework that applies ecosystem service concepts to c...

The deleterious effects of microplastic ingestion by marine organisms and the impacts across trophic levels are widely unknown. Due to the extensive ecological and socioeconomic benefits provided by coral reefs, investigating the impacts of microplastics on reef ecosystems is of ...

WNTR integrates hydraulic and water quality simulation, a wide range of damage and response options, and resilience metrics into a single software framework, allowing for end-to-end evaluation of water network resilience. WNTR includes capabilities to 1) generate and modify water...

To date, most research focused on developing more efficient and cost effective methods to predict toxicity have focused on human biology. However, there is also a need for effective high throughput tools to predict toxicity to other species that perform critical ecosystem functio...

This presentation discusses &quot;accountability&quot;; e.g., do emission-control regulations really reduce exposure to pollutants and improve human health? In this presentation, we provide examples of how to examine this and related questions.

This fact sheet provides information about EPA's Ada, OK facility, Robert S. Kerr Environmental Research Center, and will be available to the public.

The multivariate AMBI (M-AMBI) is an extension of the AZTI Marine Biotic Index (AMBI) that has been used extensively in Europe, but not in the United States. In a previous study, we adapted AMBI for use in US coastal waters (US AMBI), but saw biases in salinity and score distribu...

The Model for Prediction Across Scales &ndash; Atmosphere (MPAS-A) has been modified to allow four-dimensional data assimilation (FDDA) by the nudging of temperature, humidity, and wind toward target values predefined on the MPAS-A computational mesh. The addition of nudging allo...

In estuaries, land-surface and tidal elevation conspire to influence the amount of salt-water inundation in a specific location, ultimately affecting the distribution of estuary vegetation. Plants vary in their tolerances to salinity and inundation. Understanding even small chang...

Atmospheric models that accurately describe the fate and transport of trace species for the right reasons aid in the development of effective air-quality management strategies that safeguard human health. Controllable emissions facilitate the formation of biogenic secondary organ...

This work presents the results of an international interlaboratory comparison on ex situ passive sampling in sediments. The main objectives were to map the state of the science in passively sampling sediments, identify sources of variability, provide recommendations and practica...

The Adverse Outcome Pathway (AOP) framework has emerged to capitalise on the vast quantity of mechanistic data generated by alternative techniques (such as in vitro and in chemico), as well as advances in systems biology, cheminformatics, and bioinformatics. AOPs provide a scaffo...

Due to the ever-increasing number of chemicals coming to market, and the cost of performing traditional in vivo studies, there has been a shift towards the use of less costly alternative techniques. The adverse outcome pathway (AOP) concept has emerged as a scaffold for organisin...

This presentation is part of a ORD webinar on using total aerobic spores as a supplement to GWUDI determination tool. This presentation goes into great detail the method of how to analyze a water sample for aerobic endospores.

The aggregation and long-term (25 d) sedimentation behaviors of reduced graphene oxide (RGO) and its three successively self-assembled nanohybrids with magnetite (Fe3O4) and zerovalent silver (Ag0) nanoparticles were investigated. The aggregation behaviors of the nanomaterials in...

Epoxy-based materials are widely used for coatings, electronics insulations, and waterproofing applications due to their excellent properties such as excellent adhesion, electrical insulation, and heat resistance along with the strong mechanical property. The making of composites...

Many cities are experiencing long-term declines in population and economic activity. As a result, frameworks for urban sustainability need to address the unique challenges and opportunities of such shrinking cities. Shrinking, particularly in the U.S., has led to extensive vacant...

A morphological defect, a cortical heterotopia, has been observed in the brains of rat pups exposed in utero to moderate doses of the thyroid hormone (TH) synthesis inhibitor propylthioruracil (PTU). TH insufficiency during late gestation/early postnatal period is required to ind...

We have estimated the Ecological Footprint (EF) of the Chicago Metropolitan Area (CMA) between 1990 and 2013. EF is a metric that accounts for a region&rsquo;s ecological balance by comparing the regional supply of natural resources to the corresponding demand on those resources....