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Risk-Based Guidance for Onsite Non-Potable Reuse: Progress and Opportunities
Citation:
Garland, J., M. Jahne, A. Kaufmann, S. Sharvelle, AND K. Hamilton. Risk-Based Guidance for Onsite Non-Potable Reuse: Progress and Opportunities. 37th Annual WateReuse Symposium, San Antonio, TX, March 06 - 09, 2022.
Impact/Purpose:
Attendees will learn how microbial risk assessment can be used to define risk-based treatment targets for water reuse. Attendees will understand the distinctions between onsite non-potable water systems and centralized water/wastewater management approaches. Attendees will be able to identify the best-available treatment targets for different onsite reuse applications. Attendees will become familiar with antimicrobial resistance concerns during water reuse and understand the unique considerations required for their risk assessment. Attendees will recognize the challenges of variability in stormwater quality and how these can be addressed under the risk-based framework.
Description:
Risk-based management of onsite non-potable water systems relies on pathogen log-reduction targets (LRTs) derived using best-available scientific information. Here, we present new LRTs for California and discuss implications in comparison to previous recommendations. We also highlight ongoing efforts including additional risk assessments and improved guidance for stormwater capture and use.