Home\WateReuse Arizona\Update on the Status of Direct Potable Reuse (DPR) in California & Arizona Section Meeting

Update on the Status of Direct Potable Reuse (DPR) in California & Arizona Section Meeting

April 21, 2016 @ 11:00 am – 1:30 pm
Stantec Consulting
8211 S 48th St
Phoenix, AZ 85044
Lisa Culbert

Lunch will be provided for those in physical attendance.

11:00 AM – 12:00 PM Webinar Presentation
12:15 – 1:30 PM Arizona Section Board Meeting

Please register to participate.


Presenter: Jeff Mosher, Executive Director, National Water Research Institute (NWRI)

The purpose of this presentation is to discuss the status of Direct Potable Reuse (DPR) in California. There is strong interest in DPR by California utilities. Specifically, DPR would provide the ability to recycle more water and provide additional operational flexibility. In addition, DPR would allow for utilities without groundwater basins or reservoirs to pursue potable reuse. Legislation was passed in 2013 that requires the California State Water Resources Control Board to assemble: (1) independent Expert Panel to provide advice to the State of California on the feasibility of developing criteria for DPR; and (2) an Advisory Group to provide input to the Expert Panel and SWRCB on DPR.

The Expert Panel, which is administered by NWRI, will advise SWRCB on public health issues and scientific and technical matters regarding the feasibility of developing water recycling criteria for DPR. The expert panel is assessing potential areas of research. The Expert Panel is using a “Briefing Paper” approach to address and fulfill its charge to investigate the feasibility of developing DPR criteria. Each paper will focus on one technical/scientific topic and address: relevance to the Panel’s charge; pertinent available technical and/or research information; and overall panel findings, conclusions, and recommendations (e.g., practical engineering and/or monitoring solutions, and research topics/approach).

In addition, an Advisory Group was established by SWRCB to provide advice on DPR to both the Expert Panel and DDW. The Advisory Group is composed of members representing environmental organizations, public health organizations, taxpayer advocate organizations, water and wastewater agencies, government agencies, and others in California. The Advisory Group is developing a series of recommendation on DBP on a range of topics for consideration by SWRCB.

The Expert Panel and Advisory Group will deliver their reports summarizing their recommendations to SWRCB by July 2016. Based on these recommendations, SWRCB will provide a report to the Legislature on the feasibility of developing uniform water recycling criteria for DPR by the end of the year.


Jeff Mosher serves as Executive Director of the National Water Research Institute (NWRI), a 501c3 nonprofit located in Fountain Valley, CA, focused on improving water quality, advanced treatment technologies, and protecting public health and the environment. He works on issues in water supply and water resources, including water reuse with an emphasis on indirect and direct potable reuse.

NWRI supports a variety of projects and events on water reuse, desalination, and other areas of advanced water treatment. He has led a number of NWRI independent advisory panel efforts for water agencies, wastewater agencies, and state agencies addressing the implementation of water supply projects and policies.

NWRI also administers the Expert Panel on reviewing the Surface Water Augmentation criteria and evaluating the feasibility of developing water recycling criteria for direct potable reuse for the State of California.

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