Science Inventory

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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...

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...

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...

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...

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 ...

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 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.

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...

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...

Roof runoff has the potential to serve as an important local water source in regions with growing populations and limited water supply. Given the scarcity of guidance regulating the use of roof runoff, a need exists to characterize the microbial quality of roof runoff. The object...

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...

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. ...

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...

As part of the Grantee Kickoff Meeting for recent STAR award recipients, this presentation will cover ORD research updates on pathogen log-reduction targets (LRTs) for onsite non-potable water systems.&nbsp; Topics include collaboration to assess the &quot;state of the science&qu...

The analysis of contaminants of emerging concern (CECs) has been an ongoing priority due to their potential for adverse effects on human health and wildlife. With many tens of thousands of chemicals in use today, prioritizing specific chemicals or mixtures of chemicals that shoul...

Wastewater is a point source for many contaminants of emerging concern (CECs) and surface waters receiving their discharge often serve as source water for downstream drinking water treatment plants (DWTPs). Non-targeted chemical analysis methods and suspect screening tools have b...

Targeted chemical analyses, non-targeted analyses, and bioanalytical tools each provide a unique but incomplete understanding of the chemicals in a sample.  The US Environmental Protection Agency and US Geological Survey are collaborating to examine the sources, fates, and potent...

Recently, multiple states have explored treatment and monitoring procedures for water reuse. Advisory panels from states such as California and Texas have recommended using effects-based bioassays to screen for emerging contaminants. Due to the presence of polycyclic aromatic hyd...

Sustainability and system thinking is important in environmental education, environmental management and future design.

&nbsp; Recently, multiple states have explored treatment and monitoring procedures for water reuse. Advisory panels from states such as California and Texas have recommended using effects-based bioassays to screen for emerging contaminants. Due to the presence of polycyclic aroma...