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Waterborne illness presents public health and economic challenges to communities with limited resources and impaired infrastructure. In Puerto Rico (PR), approximately one third of the 240 drinking water systems not served by the PR Aqueduct and Sewer Authority (PRASA) offer litt...

Microplastic contamination raises concerns in drinking water quality due to difficulties in removing them during treatment and potential for contaminant leaching. EPA&rsquo;s Office of Research and Development is interested in developing sampling and analytical methods for microp...

An evaluation of the unintended consequences of implementing ion exchange treatment at a water utility for PFAS removal

Per- and polyfluoroalkyl substances (PFAS) are ubiquitous in the environment and some are known to have deleterious health effects. Predictive models can help understand the design, engineering, and costs of PFAS treatment in drinking water; however, the necessary kinetic paramet...

Per- and polyfluoroalkyl substances (PFAS) are ubiquitous in the environment and some are known to have deleterious health effects. Recently the United States Environmental Protection Agency published a proposed drinking water regulation that included six PFAS (PFOA, PFOS, PFNA, ...

With growing environmental consciousness, biomaterials (BMs) have garnered attention as sustainable materials for the adsorption of hazardous water contaminants. These BMs are engineered using surface treatments or physical alterations to enhance their adsorptive properties. The ...

The US EPA&rsquo;s arsenic demonstration program evaluated arsenic removal technologies at 50 small drinking water systems across the US in 2004-2010. This presentation provides an overview of arsenic treatment options based on that experience. It also offers a retrospective data...

The effort with FY19 funding was for further experimentation and refinement of a numerical model with benzene, in support of contamination resulting for California wildfires. This year's request (and corresponding change in FY) is aimed at unstudied organics. This work is also pa...

presentation covering aerobic and anoxic biological treatment of groundwater for small systems

Finished water storage facilities are tanks or reservoirs used to store water that will undergo no further treatment to reduce microbial pathogens except residual disinfections. Storage tanks are vulnerable to contamination, and excess water retention time may cause depletion of ...

Improve understanding of aerobic groundwater biological treatment systems

Lead corrosion assessment tools (i.e., desktop studies, bench top studies, pilot studies, diagnostic drinking water sampling for metals and pipe scaleanalysis) are used for fundamental or applied research by academic groups, as well as for voluntary operational improvements or fo...

This report summarizes the results of infrastructure decontamination experiments performed at the WSTB.&nbsp; These experiments focused on simulating contamination of drinking water distribution pipes with a commonly available insecticide formulation containing malathion.&nbsp; M...

EPA Pilot of source water Ammonia -The biological treatment process consisting of an aerated contactor and filter is effective for groundwaters containing elevated ammonia and other reduced contaminants, including iron, manganese, arsenic, and methane. Information on how the micr...

The plumbing systems of buildings are often found to contain opportunistic premise plumbing pathogens (OPPPs) such as Legionella, nontuberculous mycobacteria (NTM), and Pseudomonas with the potential to cause waterborne diseases. The objective of this study is to characterize mic...

Determination of the Effective Dispersion Coefficient in One-Dimensional Advection-Dispersion model using Random Walk Particle Tracking Approach Feng Shang and Jonathan Burkhart To accurately model the transport of water quality constituents within a pipe network, the one dimensi...

Improve concentration modeling within premise plumbing systems to understand fate and transport/ Also related to improved premise plumbing model.

With growing concerns about groundwater contamination, it is becoming increasingly important to understand the costs and benefits associated with protecting source water quality. For municipal drinking water systems, lower quality groundwater requires more treatment to meet potab...

This presentation summarizes drinking water research in the Water Infrastructure Division and includes discussion of the following drinking water topics:&nbsp;PFAS Treatment Research, Treatability Database, Biological Treatment Research &ndash; Manganese and Ammonia, Disinfection...

This presentation covers a basic introduction to two modeling tools for predicting treatment performance in drinking water systems. The first half covers AdDesignS, which is a modeling tool for predicting performance of granular activated carbon. The second half covers HSDM-IX, w...

This presentation gives an overview and update on EPA ORD&rsquo;s HABs research since the last USACE Interagency workshop on Freshwater HABs. The legislative drivers related to freshwater HABs are explained. The research discussed provides stakeholders and decision-makers at the ...

Two technical assistance projects are being conducted by EPA&rsquo;s Office of Research and Development in support of the Agency&rsquo;s administration and implementation of the Drinking Water State Revolving Fund (DWSRF) programs authorized by the Infrastructure Investment and J...

To present EPA-ORD's technical assistance projects on the treatment of emerging contaminants and LSL identification.

Upgrade of the tool to work with EPANET2.2

EPANET-MSX enables the advanced water quality modeling of reactions that involve multiple reacting species. It will help researchers and practitioners better understand and analyze the water quality problems within drinking water distribution system. This manual documents the met...