Non-Potable Onsite Water Systems Workshop
Wednesday, November 8, 2017
12601 Mulholland Drive
Beverly Hills, CA 90210

PDF Presentations from the workshop are available for download on the agenda below.

This workshop engaged attendees on the current state and future of onsite non-potable water systems. The workshop included presentations on the current state and future direction of onsite reuse, highlighting findings from the National Blue Ribbon Commission and others. Topics included: water quality guidelines, regulations, permitting, treatment system and design, economics, operation of onsite systems, and opportunities for centralized water/wastewater utilities. 

Please contact Cecilia Aleman

Water Research Foundation, US Water Alliance, California Water Environment Association (CWEA), National Water Research Institute (NWRI)

Program (PDF)



Tour of TreePeople Facility (OPTIONAL)

Join workshop attendees for a 20-30 min tour of the TreePeople facility. Walk the beautiful grounds set in Coldwater Canyon Park and learn about the benefits of trees for water management. Hear about TreePeople initiatives, such as onsite rainwater harvesting, cisterns, and the Greater LA Water Collaborative’s StormCatcher Project to help recharge local water supplies, reduce polluted runoff, and mitigate flood risks.


Workshop Welcome

15 min

Onsite Systems Workshop (PDF)

  • Onsite Non-Potable Water Systems (ONWS)
  • State of the science and available research/resources
  • Today’s program and logistics

Jeff Mosher, WE&RF

Brenley McKenna, WRF


Session 1: Why Onsite Systems?

Facilitator: Jeff Mosher, WE&RF

25 min

PANEL: Panelists will discuss the varying drivers for ONWS in different jurisdictions and climate zones, and for different stakeholders.

Ed Clerico, Natural Systems Utilities 

Paula Kehoe, SFPUC 

Amelia Luna, Sherwood Design Engineers 

15 min

The National Blue Ribbon Commission (PDF)

  • Introduction and history
  • Objectives of the Commission

Danielle Mayorga, US Water Alliance


Session 2: Water Quality Criteria, Monitoring, and Treatment for Onsite Systems

Facilitator: Katy Lackey, WE&RF

30 min

Developing Guidelines for Performance (PDF)

  • Protection of public health
  • Risk-based approach / framework

Sybil Sharvelle, Colorado State University

25 min

Ensuring System Performance Targets (PDF)

  • Treatment Goals
  • Technology Options
  • Field Verification

Harold Leverenz, University of CA, Davis

25 min

Operations Considerations for ONWS (PDF)

  • Operations and maintenance / operators
  • Performance responsibility – the role of the RME
  • Cost-benefit profile of ONWS

Ed Clerico, Natural Systems Utilities


Coffee Break and Booth Exhibit


Session 3: Public Health and Onsite Systems

Facilitator: Paula Kehoe, SFPUC

25 min

Perspectives from Public Health Agencies (PDF)

  • Considerations for public health agencies
  • Benefits, challenges, and remaining questions
  • Lessons learned from Los Angeles


Carlos Borja, LA County of Public Health


Session 4: Regulations and Permitting Strategies

Facilitator: Suzanne Sharkey, NWRI

10 min

Current Regulatory Environment and Permitting Agencies (PDF)

  • Brief overview
  • What’s working and what’s not?

Jeff Mosher, WE&RF

25 min

Pathogen Crediting for Onsite Systems (PDF)

  • Applying existing pathogen crediting frameworks to meet LRTs
  • Challenges and research needs for ONWS crediting
  • How crediting fits into system permitting

Brian Pecson and Sarah Triolo, Trussell Technologies


25 min

Proposed Regulatory Approach (PDF)

  • Model Policy for ONWS
  • State and local efforts

Paula Kehoe, San Francisco Public Utilities Commission


Lunch Break and Booth Exhibit


Workshop Discussion: What regulatory challenges are you facing?

20 min

Open discussion by speakers, with workshop participants

Facilitator: Danielle Mayorga, US Water Alliance


Session 5: Impacts and Opportunities for Utilities

Facilitator: Brenley McKenna, WRF

25 min

Can Onsite Decentralized Systems Work in Harmony with Centralized Systems? (PDF)

  • Onsite discharge and downstream systems
  • Symbiotic relationship - centralized and decentralized systems

Michael Simpson, LA SAN


15 min

Building an Onsite Reuse Program (PDF)

  • Blueprint for ONWS
  • Key program considerations

Paula Kehoe, San Francisco Public Utilities Commission

15 min

Making the Utility Case for Onsite Systems (PDF)

  • Identifying drivers and benefits
  • Managing challenging considerations
  • Driving a One Water future

Danielle Mayorga, US Water Alliance


20 min

Society, Community, and Environmental Benefits/Challenges (PDF)

  • Perspectives from the green building sector
  • Designs in existing and new buildings
  • One Water for city sustainability

Mark Gangi, Gangi Architects



Coffee Break and Booth Exhibit


Session 5: Impacts and Opportunities for Utilities (continued)

25 min

Project Owner and Design Engineer Perspectives (PDF)

  • Project designs
  • Case studies

Amelia Luna, Sherwood Design Engineers


Session 6: The Future of Onsite Reuse

Facilitator: Jeff Mosher, WE&RF

25 min

PANEL: Visionaries in the water sector will discuss how they see decentralized systems in our industry and where we’re headed, including perspectives from the green building sector.

Mark Gangi, Architect

Paula Kehoe, SFPUC

Brian Pecson, Trussell Technologies

Jackie Taylor, LA Health



Listening Session: What are your unanswered questions? Any research needs?

20 min

Open discussion with workshop participants

Jeff Mosher, WE&RF

Brenley McKenna, WRF


Closing and Thank Yous

Thank you to our Sponsors!

Gold Sponsor

Silver Sponsors