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&alpha;-Aminonitriles are very useful in the synthesis of bioactive natural products and pharmaceutically important heterocycles.1 The transition metal catalyzed C-H activation followed by cyanation is the most straightforward possible reaction sequence used to accomplish this tr...

Population growth and unsustainable agricultural and industrial activities have led to a decrease in water quality and availability, causing ecological risks and challenging drinking water treatment plants to provide clean water. Many techniques are available for monitoring known...

The number of abandoned mines globally is in the hundreds of thousands, with many mines capable of generating acidity, increasing metal solubility, and degrading environmental quality. Biochar may play a role in alleviating acidity and heavy metal contamination by increasing soi...

There is a need for fast, efficient, and cost-effective hazard identification and characterization of chemical hazards. This need is generating increased interest in the use of zebrafish embryos as both a screening tool and an alternative to mammalian test methods. A Collaborativ...

Harmful algal blooms (HABs) in freshwater and marine systems are defined as an overgrowth of photosynthetic organisms (eukaryote and prokaryote) which have the potential to cause negative health, ecological or economic impacts. These negative impacts are caused by mechanisms that...

Since 2001 in the United States, two chlorinated cyanurates, commonly referred to as dichlor (anhydrous sodium dichloroisocyanurate or sodium dichloroisocyanurate dihydrate) or trichlor (trichloroisocyanuric acid) may be approved by states, tribes, or territories for use in drink...

Building water systems (BWSs) promote the regrowth and survival of opportunistic pathogens, such as Legionella pneumophila, especially within biofilms (BFs), where most drinking water (DW) microbes reside. However, compared to their planktonic (PL) form, disinfection efficacy fo...

The toxicity of waters with sufficiently elevated concentrations of major geochemical ions (Na+, K+, Ca2+, Mg2+, Cl-, SO42-, and HCO3-/CO32-) to aquatic life is well demonstrated, though the majority of such studies have focused on acute toxicity. To support prediction of chroni...

Manual for citizen scientists on how to prepare a quality assurance plan

Headwater ephemeral tributaries are interfaces between uplands and downstream waters. Terrestrial coarse particulate organic matter (CPOM) is important in fueling aquatic ecosystems; however, the extent to which ephemeral tributaries are functionally connected to downstream water...

A decline in submerged aquatic vegetation (SAV) within Florida&rsquo;s spring-fed thermal refuges raises questions about how these systems support winter foraging of Florida manatees Trichechus manatus latirostris. We analyzed telemetry data for 12 manatees over 7 yr to assess th...

Regional Monitoring Networks (RMNs) bring together a diverse set of partners from EPA, state agencies, tribes, federal partners, and other entities. The goal of this collaborative effort is to collect long-term biological, thermal, hydrologic, physical habitat and water chemistry...

A multi-agency, collaborative effort was completed in the fall of 2016 and summer of 2017 to provide a baseline assessment of pre-remedial conditions. Multiple state and federal agencies (U.S. Army Corps of Engineers (USACE), U.S. EPA ORD, U.S. EPA GLNPO, USGS and Minnesota Pollu...

This poster provides information on EPA's small drinking water systems communications and outreach activities.

Urban communities use hydrologic models to plan for and assess the effectiveness of stormwater control measures. Although emphasis is placed on soils as permeable surfaces that regulate the rainfall-runoff process, representative soil hydrologic parameters for urban areas are rar...

We compare the performance of two hypothesis test statistical approaches currently used in U.S. water regulatory programs to interpret the reproduction endpoint for the Ceriodaphnia dubia survival and reproduction aquatic toxicity test. These statistical approaches are (1) the w...

To maximize the ability to detect differences in communities before and after projects or in different reaches, a macroinvertebrate sampling method is desired which can deal with flashy flow patterns, is relatively quantitative, and retrieves a high proportion of the taxa present...

To address increasing demand during the last decades, bean producers have intensified agricultural activities by increasing the use of industrial inputs. Such intensification can impose environmental as well as economic risks to fragile ecosystems. Emergy and economic analyses we...

The study was devised to connect emergency management and homeland security offices at the city, state, and federal agencies and discuss the availability and potential response capabilities of equipment reserves. This project focused on connecting with relevant emergency manageme...

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

This poster discusses an EPA communications tool for selecting point of use (POU) drinking water filters certified to reduce lead.

Cyanobacterial harmful algal blooms (cyanoHAB) cause human and ecological health problems in lakes worldwide. The timely distribution of satellite-derived cyanoHAB data is necessary for adaptive water quality management and for targeted deployment of water quality monitoring reso...

Excess nitrogen (N) and phosphorus (P) from human activities have contributed to degradation of coastal waters globally. A growing body of work suggests that hydrologically restoring streams and rivers in agricultural and urban watersheds has potential to increase N and P retenti...

Lead (IV) corrosion scales have been found in approximately 30% of lead service line pipes from across the US that have been examined by ORD researchers. These scales are relatively insoluble which prevents lead from being released into the water, but this stability requires main...

Despite frequent field observations of microplastics (i.e., plastic particles &lt;5mm in size) there is a critical knowledge gap of their fate and effects in marine and estuarine environments. Many microplastics ultimately accumulate in marine sediments because of physicochemical...