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Increasing water shortages and aging infrastructure have broadened interest in using alternative source waters for a range of end uses. Developing fit-for-purpose treatment approaches requires consideration of both the proximal risks of reuse-related exposures and the more distal...

Our nation's water infrastructure is in need of billions of dollars of repairs, upgrades, and replacements. This presentation provides an overview of recent EPA Office of Research and Development research on the topic of resilient water infrastructure, including free models and t...

Rain contains encapsulated bacteria that can be transported over vast distances during relatively short periods of time. However, the ecological significance of bacteria in &ldquo;precontact&rdquo; rainwater -rainwater prior to contact with non-atmospheric surfaces -remains relat...

This talk summarizes our current research on decentralized water systems, focuses on both our development of risk-based guidance for fit-for-purpose reuse of alternative waters and integrated assessment of&nbsp; the life cycle costs/impacts of different decentralized system scena...

System-based accounting tools for such system-wide evaluations are showcased and provide in-depth analyses of the economic trade-offs, environmental impacts and system performances.&nbsp; The detailed holistic evaluation helps the decision-makers design more robust, effective and...

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 product is a series of slides to highlight the current understanding of PFAS toxicity with animal models and the corresponding findings from epidemiological surveys.

Multiple States have explored the implementation of in vitro new approach methodologies (NAMs) as component of water quality monitoring programs to detect biological activity indicative of potential contaminant and/or contaminant mixture occurrence. Polycyclic aromatic compounds ...

Onsite non-potable water systems (ONWS) collect and treat locally available source waters (e.g., wastewater, graywater, stormwater, and roof runoff) for end uses such as toilet flushing and irrigation. Quantitative microbial risk assessment has been used to develop pathogen log-r...

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...

In the United States, onshore oil and gas extraction operations generate an estimated one trillion gallons of produced water annually, making it the largest waste stream associated with upstream development of petroleum hydrocarbons by volume. Produced water is defined as the inc...

Onsite collection of air conditioning (AC) condensate can provide significant quantities of water for non-potable applications such as cooling towers and landscape irrigation.&nbsp; While generally considered a high-quality source, empirical studies of condensate water quality to...

Rainwater and stormwater can be used as water sources for onsite non-potable use. This presentation will describe modeling and measurements used to develop risk-based treatment guidance for these source waters. Ongoing work and next steps to further refine risk assessment models ...

Global demand for safe and sustainable water supplies necessitates a better understanding of contaminants in potential reuse waters. In this study, we compared exposures and load contributions to surface water from discharge of three reuse waters (wastewater effluent, urban storm...

Increasing water shortages and aging infrastructure have broadened interest in using alternative source waters for a range of end uses. Developing fit-for-purpose treatment approaches requires consideration of both the proximal risks of reuse-related exposures and the more distal...

This presentation is a seminar to students in the Water Resources Science and Technology program at Texas A&M University – San Antonio.  I will discuss my current research on onsite non-potable water reuse as well as my career path and experience working in government research.

This presentation at WQTC will describe the derivation of pathogen treatment targets for onsite reuse of wastewater, graywater, stormwater, and roof runoff, highlighting ongoing efforts to further refine these targets.

This talk summarizes our current research on decentralized water systems, focuses on both our development of risk-based guidance for fit-for-purpose reuse of alternative waters and integrated assessment of the life cycle costs/impacts of different decentralized system scenarios. ...

Water reuse, particularly coupled with wastewater as part of integrated water management, is at the nexus of water, energy, and&nbsp;nutrients. System analysis is needed to quantify the tradeoffs among alternative processes and to design efficient systems to optimize the connecti...

Contaminants of Emerging Concern (CECs), as a class of chemicals and biological stressors, are typically found at low concentrations, are difficult to measure, and can be linked to many on-going and historic sources.  The challenge with source identification and control is that i...

*This is a repeat of the 8/22/22 meeting for additional attendees* Presentation to the project team for Water Reuse Action Plan Action 4.5 related to air conditioning condensate collection and use.&nbsp; The presentation will summarize preliminary results of our condensate water ...

Update presentation to the National Blue Ribbon Commission for Onsite Non-potable Water Systems (NBRC) describing new pathogen log-reduction targets (LRTs) for onsite water reuse.&nbsp; The updated draft LRTs reflect the state-of-the-science on source water pathogen characterizat...

Presentation to the project team for Water Reuse Action Plan Action 4.5 related to air conditioning condensate collection and use.  The presentation will summarize preliminary results of our condensate water quality study characterizing opportunistic pathogens and metals across 1...

EPA ORD conducts a variety of lab, field, and modeling based studies to address water-related research projects of interest to Region 2 and their states and territories, including drinking water, wastewater, surface water and water reuse research. This presentation provides a bri...

Urban water systems are not self-contained units, economically or ecologically. They rely on larger biophysical supports from natural capital. The behavior of such systems as a whole and the interactions between subcomponents can be observed. The optimization at system level to a...