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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.

To present on the management of drinking water treatment residuals from systems treating for PFAS.&nbsp;

Manganese is prevalent in regions throughout the U.S. A water system might choose to install treatment to achieve lower manganese concentrations and would need to manage legacy Mn in the distribution system. Biological treatment of groundwaters with multiple contaminants via aera...

Manganese is listed on Contaminant Candidate List 5 and is undergoing regulatory review. It poses a health concern at higher concentrations due to potential neurotoxic effects, whereas it is an aesthetic issue at lower concentration due to the staining and discoloration it causes...

Potable water is delivered to buildings via water treatment and distribution systems. USEPA regulates the delivery of this water; however, the regulations stop at the distribution system, and they don&rsquo;t continue into the buildings. Water management plans often employ low-co...

This study represents an important first step towards using microelectrodes to (1) understand and provide direct measurement of oxidant microprofiles from the bulk water to the metal surface; (2) determine pipe wall reactivity using the directly measured concentrations profiles v...

An overview of PFAS management strategies will be presented for contaminated matrices in the environment and built infrastructure.

This study illustrates the usage of multi-species modeling tool to analyze water quality and evaluate water safety within drinking water distribution system.

We developed 2011-2050 land cover change scenarios and modeled the impact of projected land cover change on influent water quality to support long-term planning for the Minneapolis, MN Water Treatment Distribution Service (MWTDS). Projected land cover changes based on relatively ...

Nitrite (NO2−) produced during nitrification episodes in chloraminated drinking water distribution systems (CDWDSs) is typically quantified using ion chromatography (IC) or colorimetric techniques.  NO2− can also be quantified using chemometric models (CMs) formulated using molar...

Existing heterotrophic denitrification reactors rely on microorganisms to consume dissolved oxygen and create conditions suitable for denitrification, but this practice leads to excessive microbial growth and increased organic carbon doses. An innovative reactor that uses nitroge...

Diffusion coefficient measurements in passive sampler gel layers typically assume pseudo-steady state flux.  This study reports non-steady state flux occurs in diffusion cell tests with implications for environmental compliance monitoring.

Industrial producers and users of per- and polyfluorinated alkyl substances (PFAS) have been a major source of chemical contamination to nearby communities due to historical releases of legacy PFAS. Following the general phase-out of legacy PFAS such as PFOA/PFOS, industrial usag...

To present BIL Emerging Contaminant program to West Virginia systems.

An overview of ORD's technical assistance project for the treatment of PFAS and other emerging contaminants to the Tribal Emerging Contaminants Work Group.

To present ORD's research on PFAS treatment at centralized water utilities to the State of Arizona's Water Quality Division.

This talk was given as a basic introduction to PFAS and associated EPA tools. This highlights the available tools for the drinking water industry, including: (1) treatability database, (2) EPA Work Breakdown Structure cost models, (3) GAC and Ion Exchange treatment performance mo...

The research conducted by EPA/ORD on the removal of PFAS from drinking waters will be presented to the Region 4 states. Also covered will be the new technical assistance program run by EPA/ORD.

EPA's research program on drinking water treatment will be presented to North Carolina DEQ.

For the past several years, the Office of Research and Development (ORD), US Environmental Protection Agency (EPA), and the Metropolitan Sewer District of Greater Cincinnati (MSDGC) have been investigating the use of peracetic acid (PAA) as an alternative to chlorination and ultr...

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...

Recent proposed drinking water regulatory levels for PFOA and PFOS, and a hazard index level for PFBS, PFHxS, PFNA, and GenX species has increased interest in understanding treatability of these and other per- and polyfluoroalkyl substance (PFAS). GAC has a long history of removi...

This presentation was developed to update the SSWR HABs RAC on the progress made on SSWR.404.2 (Management of HABs in the Built and Natural Environment) during FY23.

This report summarizes efforts to detect contamination from rainfall events using online water quality sensors. Stormwater has long been an area of concern when it comes to contaminant monitoring and potential remediation. Combined Sewer overflow (CSO) systems can collect rainwat...