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With increasing populations, mounting environmental pressures and aging infrastructure, urban water and wastewater utilities have to make management decisions limited by both economic and environmental constraints. The challenges facing urban water systems can no longer be sustai...

Hurricane Katrina resulted in damage and destruction to local water supplies in Mississippi and Louisiana affecting millions of people. Immediately following the devastation, a multidisciplinary team of 30 EPA emergency response, research, and water program personnel joined forc...

We showed previously that in utero exposure to the cholesterol-lowering drug simvastatin (SMV) during sex differentiation lowers fetal lipids and testicular testosterone production (T Prod) in Hsd:SD rats. Here, the effects of SMV on fetal lipids and T Prod in Crl:CD(SD) rats wer...

This submission is a slide presentation that has already been formerly cleared and presented at the National ACS spring meeting in Boston, MA 2018 (ORD-025841) and the Ground Water Professionals of North Carolina annual meeting in November 2018 (ORD-029090). Changes have been mad...

The rate of deforestation declined steadily in Thailand since the year 2000 due to economic transformation away from forestry. However, these changes did not occur in Nan Province located in northern Thailand. Deforestation is expected to continue due to high demand for forest pr...

Active soil-gas sampling has been used as a reconnaissance method in support of soil and groundwater sampling of volatile and biodegradable organic compounds for over 30 years. More recently, soil gas sampling has been used directly to evaluate risk posed by vapor migration from ...

Light-absorbing organic carbon (OC), also referred to as “brown carbon” (BrC), has been intensively investigated in biomass burning (BB) impacted atmospheres. However, other BrC sources (e.g., secondary formation) are rarely studied in ambient aerosols. In the current work, forty...

Synthesis of existing research on nutrient (i.e., nitrogen and phosphorus) stressor-response relationships can provide scientific evidence for environmental decision makers charged with protecting and managing ecosystem integrity through the tools provided by the Clean Water Act,...

The potential emerging pollutants (PEPs) including hazardous chemicals, toxic metals, bio-wastes, etc., pose a severe threat to the human health, hygiene and ecology by way of polluting the environment and water sources. These pollutants may have been originated from the industri...

Toxicant concentrations in surface waters and sediments are of environmental concern due to their potential impacts on ecological and human receptors. Numerical, process-based, mass balance models are one way to understand a system and its governing processes, assist in supportin...

Little is known about how stormwater exfiltrates from green infrastructure and few efforts have been undertaken to address this question. This study used tensiometers to monitor water exfiltration from an aggregate-filled storage gallery installed under permeable pavement. An 80 ...

The state of Iowa has set an ambitious goal to reduce nitrogen and phosphorus loading by 45% and maintain agricultural production while providing critical ecosystem services across these landscapes. As our understanding of the close relationship between agricultural practices and...

Although there is no direct connection between Extreme Weather Events and corrosion issues in drinking water distribution systems, there are situations that may arise that would result in corrosion events that could impact human health. One would be a large change in source wate...

While chemical analysis of contaminant mixtures remains an essential component of environmental monitoring, bioactivity-based assessments using in vitro systems increasingly play a role in the detection of possible biological effects. Historically, in vitro assessments focused on...

For decades, the focus of drinking water providers has been on fecal pathogens like E. coli, Giardia, and Cryptosporidium. In recent years, drinking water professionals and building operators have begun to recognize the importance of so-called opportunistic pathogens like Legione...

Sampling of drinking water distribution systems is performed to satisfy regulatory requirements but also to respond to customer complaints or emergency situations. Water distribution system modeling techniques can be used to plan and inform sampling strategies; however, a high de...

In view of the increasing applications of nanocatalysis in chemical transformations, this article illustrates recent advances on the use of nanocatalysts for an important reduction reaction, the hydrogenation of nitroaromatics to significant aminoaromatics with aqueous NaBH4 solu...

Regenerative stormwater conveyance (RSC), a relatively new stormwater management approach, is extensively implemented throughout the mid-Atlantic for nutrient control, but little is known of its pollutant reduction capabilities and controlling factors. This study examined effects...

Organic solvents are widely used in a variety of industrial sectors. Reclaiming and reusing the solvents may be the most economically and environmentally beneficial option for managing spent solvents. Purifying the solvents to meet reuse specifications can be challenging. For hyd...

Watersheds provide a range of services valued by society, incorporating biotic and abiotic functions within their boundaries. Watershed integrity has been defined as the capacity of a watershed to support and maintain the full range of ecological processes and functions essential...

Sea-level rise (SLR) is not just a future trend; it is occurring now in most coastal regions across the globe. It thus impacts not only long-range planning in coastal environments, but also emergency preparedness. Its inevitability and irreversibility on long time scales, in addi...

Technical Brief

We constructed a seasonal nitrogen (N) budget for the year 2008 in the Calapooia River Watershed (CRW), an agriculturally dominated tributary of the Willamette River (Oregon, U.S.) under Mediterranean climate. Synthetic fertilizer application to agricultural land (dominated by gr...

The production of graphene-family nanoparticles (GFNs) has increased appreciably in recent years. Graphene oxide (GO) has been found to be the most toxic nanoparticle among GFNs and, to our knowledge, no studies have been conducted to model its fate and transport in the environme...

Spatial patterns in major dissolved solute concentrations were examined to better understand impact of surface coal mining in headwaters on downstream water chemistry. Sixty sites were sampled seasonally from 2012 to 2014 in an eastern Kentucky watershed. Watershed areas (WA) ran...