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In April 2008, a workgroup of water resource agencies in the Santa Ana Watershed was convened by the Santa Ana Watershed Project Authority to work cooperatively with the Regional Board to investigate “emerging constituents” and determine which emerging constituents may be important to assure water quality protection in the Santa Ana River Watershed. The term “emerging constituents” used by the workgroup is synonymous with similar phrases used to describe the same phenomena such as emerging contaminants of concern, chemicals of emerging concern (CEC), micro-constituents, micropollutants, trace organics, etc. These other phrases may mistakenly imply that it is the concern that is emerging rather than the knowledge that certain chemicals may be present in a water sample. Similarly, referring to such compounds as emerging pollutants or emerging contaminants may mistakenly imply that the levels detected are a pollutant or contaminant of concern. Consequently, the term “emerging constituents” is used throughout this Agreement to identify the focus of the Task Force efforts.
In 2007, a workgroup was formed among the water recharging agencies and POTWs to address a characterization program for emerging constituents. SAWPA was requested to administer the development of a two-phased study approach. The Emerging Constituents Workgroup study effort was separated in two phases.
Task Force Agenda Packets and Meeting Notes
Phase 1 – covered current water quality monitoring programs, regulatory issues, stakeholder concerns, analytical methods, and the state-of-the-science with respect to potential public health & environmental impacts. This phase culminated in a written report submitted to the Regional Board in Dec. 2008 characterizing the Workgroup’s preliminary findings.
Phase 1 Report
Phase 2 – reflects the results of ongoing Emerging Constituents characterization studies and other related evaluations to define an Emerging Constituents Investigative plan for the RWQCB approval by Dec. 2009.
Phase 2 Report
| Report Title | Author | Date |
| 2021 EC SAR Watershed PFAS Study Report | EC-TF | April 2021 |
| 2019 EC Sampling Report | EC-TF/Risk Sciences | April 2019 |
| 2013 Annual EC Sampling Report | EC-TF | April 2014 |
| 2012 EC Progress Report | Risk Sciences | 2012 |
| 2012 Annual EC Sampling Report | EC-TF | March 2013 |
| 2011 Annual EC Sampling Report | EC-TF | December 2011 |
| 2011 Annual EC Sampling Report | U.S. GAO | August 8, 2011 |
| Phase II EC Workplan Report, EC Workgroup, 12-8-09 | SAWPA | December 8, 2009 |
| 2010 Emerging Constituents Sampling Report | EC-TF | December 2010 |
| Monitoring Strategies for Chemicals of Emerging Concern (CECs) in Recycled Water Final Report | SWRCB | June 25, 2010 |
| SWRCB CEC Panel Report Summary Final April 19, 2010 | SWRCB | April 19, 2010 |
| Final Report (draft for comments) Monitoring Strategies for Chemcials of Emerging Concerns in Recycled Water April 15, 2010 | SWRCB | April 15, 2010 |
| Sampling and Laboratory Analysis Plan for the 2010 -11 EC Characterization Study in the SAW | EC-SLAP | March 23, 2010 |
| Petition for Water Quality Criteria for Endocrine Disrupting Chemicals | Center for Biological Diversity | January 15, 2010 |
| Bottled Water Quality Investigation: 10 Major Brands, 38 Pollutants | Environmental Working Group | October 15, 2008 |
| Presentation Name | Author | Date |
| Orange County PFAS Update | Orange County Water District | December 17, 2019 |
| EC and PFAs Sampling Results - August 2019 | SAWPA | December 17, 2019 |
| PFAS, PFOA, and PFOS in Orange County | Orange County Water District | June 2 , 2019 |
| EC Task Force Social Media Services | Degrave Communications, Inc. | June 2, 2019 |
| 2010 EC Sampling Results Presentation | Risk Sciences | December 20, 2010 |
| State’s Water Recycling Policy Attachment | Risk Sciences | August 22, 2012 |
| Golf Course Research Project WERF1C08 Findings to Date | WERF | April 21, 2010 |
| Contaminants of Emerging Concern | Suzanne Rudzinski | April 28, 2009 |
| Pharmaceuticals and Endocrine Disruptors | Shane Snyder | April 28, 2009 |
| State of the Science | Daniel Schlenk | April 28, 2009 |
| Managing CEC’s in California | Tam Doduc | April 28, 2009 |
| Green Chemistry Initiative | Maziar Movassaghi | April 28, 2009 |
| Managing Contaminants of Emerging Concern | Joyce Donohue | April 28, 2009 |
| Lessons Learned | Y. Carrie Gou
Steven Fitzsimmons | March 29, 2009 |
For further information about this project, please contact:
Rachel M. Gray
Water Resources and Planning Manager
rgray@sawpa.gov
951-539-0261
