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The U.S. Environmental Protection Agency&rsquo;s Office of Research and Development (ORD) has been using Hester-Dendy (HD) multi-plate artificial substrate samplers as part of their standard monitoring protocols for over a decade at Great Lakes Area of Concern (AOC) sites. To bet...

Most of us are comfortable with a research framework that starts with foundational knowledge from the literature and builds on our own work to date. This allows us to ask new iterations of these questions focused on the environment. However, sometimes we want to extend our resear...

Determining how colonization condition affects the structure of the macroinvertebrate community in stream mesocosm studies is important for experimental design and understanding the relevance of exposure studies. Until recently, dosing study priorities for the USEPA Experimental ...

Stream tributaries can be impacted by a myriad of fecal pollution sources that contribute to water quality impairment in receiving waters. &nbsp;Strategic water quality monitoring of tributaries can enhance the ability to identify fecal pollution sources to better protect human h...

How does the extent and configuration of landscape metrics and onsite stressors interact with Euclidean and stream network distances to explain variation in stream condition index in a river basin? I am using data from Virginia Department of Environmental Quality's Probabilistic ...

A financially and technically accessible method for screening powdered activated carbons for control of HAB toxins in water treatment.

The continued development of real time stormwater monitoring has allowed for faster response as well as better containment and mitigation efforts concerning potential contamination events. The purpose of this experiment is to develop a system of deployable sensor stations that wi...

Per- and polyfluoroalkyl substances (PFAS) are a group of chemicals that have gained interest because some PFAS have been shown to have deleterious health effects and prolonged environmental and biological persistence. Chemicals classified as PFAS have a wide range of chemical mo...

It has been challenging to analyze inorganic arsenic (iAs) with anion exchange HPLC-Electrospray Ionization-Mass spectrometry (HPLC-ESI-MS), because arsenite (As(III)) is difficult to retain on column and the salts in mobile phase causes ionization suppression of iAs. To address ...

Context:  Legionella pneumophila is the etiologic agent responsible for causing >90% of legionellosis cases in the United States.  Legionellosis transmission primarily happens by the inhalation or aspiration of contaminated water aerosols or droplets. Therefore, methods are neede...

The impact of water and the wet-dry cycle was examined as a potential mitigation solution to pathogenic bacterial spore transport and inhalation risk via resuspension of spores from surfaces due to human activities. The natural occurrence of wet-dry cycles and the ease of applica...

This presentation highlights successes and failures of contracting water quality models. It is meant for water quality managers and non-modelers to understand the results presented following model development, and presents suggestions on how to go beyond the typical model results...

This presentation is designed for a classroom setting of undergraduate students to highlight application of water quality models, with an emphasis on the challenges of implementing, calibrating, and evaluating model results.

Biotic condition of streams with respect to nutrient pollution has been evaluated using biological indicators such as macroinvertebrate assemblages or periphyton communities, particularly diatoms. Molecular approaches have shown promise for this application, potentially because p...

Lead (Pb) exposures from soil and dust ingestion contribute to children's blood lead levels (BLLs) in the United States. The U.S. Environmental Protection Agency (EPA)'s Strategy to Reduce Lead Exposures and Disparities in U.S. Communities and the Federal Action Plan to Reduce Ch...

The potential for polycyclic aromatic hydrocarbon (PAH)-related effects in benthic organisms is commonly estimated from organic carbon-normalized sediment concentrations based on equilibrium partitioning (EqP). Although this approach is useful for screening purposes, it may overe...

The San Juan Bay Estuary (SJBE) is an interconnected system of streams, bays, lagoons, and canals located in a highly urbanized area in San Juan, Puerto Rico. Due to the rapid rate of urbanization, some communities across the SJBE have limited access to or are impacted by failure...

Benthic harmful cyanobacteria blooms pose a significant threat to domestic animals, wildlife, and humans. U.S. states, tribes, and local agencies need consistent approaches to characterize relative risk and inform mitigation practices. USEPA is addressing this need with multi-yea...

Globally, rainwater harvesting (RWH) has been creatively used to address water supply needs for various non-potable and domestic potable purposes in the face of climate change and water supply reliability.&nbsp; Previously, we investigated comprehensive human health and environme...

This presentation provides an overview of select U.S. EPA Office of Research and Development research qPCR fecal source identification activities pertaining to the Safe and Sustainable Water Resources Research Action plan for 403.1.1 research priorities.

Building on UST Finder V1, the first national map of current and historic USTs, UST facilities, and UST releases in the US, V2 will be&nbsp; developed in collaboration with state, territorial and tribal partners to catalog both the dynamic spatial and attribute information of thi...

Extensive research in recent years has reported higher per- and polyfluoroalkyl substance (PFAS) concentrations in municipal solid waste (MSW) landfill leachate than other municipal wastewaters, including multiple studies of leachate from MSW landfills in the United States. Becau...

Climate change could add a variety of uncertainties to hydrological processes and water resources. Very limited efforts have been devoted to applying the US-EPA (Environmental Protection Agency)&rsquo;s Hydrologic and Water Quality System (HAWQS) model for predicting climate chan...

The increasing environmental and human health concerns about lead in the environment have stimulated scientists to search for microbial processes as innovative bioremediation strategies for a suite of different contaminated media. In this paper, we provide a compressive synthesis...

&bull;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; An updated version (2) of EPA&rsquo;s River Basin Export Reduction Optimization Support Tool (RBEROST) has been developed to provide nutrient management strategies for the Puget Sound Basin.&nbsp; RBEROST is an R-based tool that sets up ...