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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...

Decision-makers considering source water or wellhead protection often lack quantitative estimates of its benefits. &nbsp;This joint presentation will help explain the role economics has in estimating avoided treatment costs and determining whether source water or wellhead protect...

Numerous technologies are available for treatment of mining-influenced water (MIW) at abandoned mining sites. Case studies examining both established and recently developed technologies for treating MIW are reported in conference proceedings, reports, or journal articles. Studies...

This study uses batch experiments to examine the kinetics and equilibria of sorption of two anionic dyes, metanil yellow and indigo carmine, by strong base ion exchange resins that are commonly studied for treatment of PFAS in drinking water. Results of the batch experiments are ...

Presentation on detailed water quality and regulated disinfection byproduct sampling before, during, and after a free chlorine conversion in a surface water chloraminated drinking water distribution system.

Treating per- and poly-fluoroalkyl substances (PFAS) contaminated water is an important research topic due to the potential health risks associated with PFAS exposure. Membrane distillation (MD), which utilizes hydrophobic microporous membranes that prevent the transport of non-v...

To present ORD's PFAS research to Region 5.

To present ORD's research on PFAS to the states in Region 8.

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

Granular activated carbon (GAC) adsorption is well studied for per-and-polyfluoroalkyl substances (PFAS) treatment. However, there is a lack of systematic and controlled studies conducted at drinking water relevant conditions. This presentation will cover USEPA research to evalua...

The impacts of nucleic acid-based methods - such as PCR and sequencing - to detect and analyze indicators, genetic markers or molecular signatures of microbial faecal pollution in health-related water quality research were assessed by rigorous literature analysis. A wide range of...

Adding new unit operations to drinking water treatment systems requires consideration of not only efficacy for its design purpose but also cost, water quality characteristics, impact on overall regulatory compliance, and impact of other treatment unit operations. Here, pilot stud...

Granular activated carbon (GAC) adsorption of per-and-polyfluoroalkyl substances (PFAS) is an established and effective water treatment technology for PFAS removal. However, due to the multifaceted nature of adsorption, GAC treatment system efficacy is site specific. Therefore, a...

The project team evaluated the device at multiple wavelengths to assess optimal performance under specific conditions for select contaminants and a suite of contaminants.&nbsp; This collaboration focused on the following:&nbsp; - Reactor optimization and flow scale-up,&nbsp; - Mo...

Access to a clean and healthy environment is a human right and a prerequisite for maintaining a sustainable ecosystem. Experts across domains along the chemical life cycle have traditionally operated in isolation, leading to limited connectivity between upstream chemical innovati...

The lack of widely available methods for distinguishing and quantifying organic chloramines has raised concerns for maintaining effective disinfectant residuals in chloraminated drinking water distribution systems (CDWDSs). This study provided quantitative estimation of dichloram...

Presentation will provide a summary of recently published manuscript:  Abulikemu, G., Mistry, J. H., Wahman, D. G., Alexander, M. T., Kennicutt, A. R., Bollman, J. D., and Pressman, J. G. (2023) Investigation of Chloramines, Disinfection By-products, and Nitrification in Chloram...

Summary: A life cycle assessment (LCA) and life cycle cost analysis (LCCA) study that estimates environmental impact and cost of operating an existing indirect potable reuse (IPR) system in Gwinnett County, Georgia and compares that impact to two hypothetical direct potable reus...

This presentation summarizes the chemistry of lithium in water and available data on drinking water treatment removal effectiveness.&nbsp;

The purpose of this research was to determine the viability of installing low-cost storm sewer retrofit devices in multiple locations within an urban watershed.  A major component of this was the necessity for designing, fabricating, and operation of such retrofits which are not ...

239 small communities in remote and rugged locations are not connected to Puerto Rico Aqueduct and Sewer Authority (PRASA) for their drinking water. This research seeks to develop, install, evaluate and monitor affordable and sustainable treatment technologies to support non-PRAS...

Plastic pollution is ubiquitous worldwide. Smaller pieces of plastic (<5 mm) denominated as microplastics (MPs) are of particular concern because they can be easily transported throughout the environment. As they travel, MPs can adsorb chemicals or nutrients, and develop a biofil...

To present on managing PFAS treatment residuals to the Water Quality Division of the Arizona DEQ.