ASR – MAR Work Group

Current Work & Goals

Water reuse represents a major opportunity to supplement existing water supplies.  Many potential water sources such as industrial process water, agricultural return flows, municipal wastewater, oil and gas produced water, and stormwater can be captured and used for enhanced aquifer recharge.

Established in September 2019, the Aquifer Storage and Recovery – Managed Aquifer Recharge (ASR-MAR) Workgroup was formed to examine, discuss, and make recommendations to the GWPC Board of Directors regarding Aquifer Storage and Recovery (ASR) and Managed Aquifer Recharge (MAR) issues or topics.

The Workgroup serves as a forum for Federal, State, Tribal, and local government, organizations and public interest, and professional organizations to exchange information, views, and ideas, and to communicate and collaborate on efforts concerning ASR and MAR issues or topics. Its efforts are not limited in scope to just UIC issues. The issues that may be examined are broad and may include enhanced or managed aquifer recharge practices that are not regulated by the SDWA UIC program.

Co-Chairs Include:

(Click links to view bios)

Leadership Team:

Federal Government Agencies

  • Doug Beak, Ph.D., U.S. EPA, Robert S. Kerr Environmental Research Center
  • Andrew O’Reilly, Ph.D., USDA — Agricultural Research Service

Tribal, State, Territory and/or Local Government Agencies

  • Andrea Croskrey, Texas Water Development Board
  • Robert T. Verrastro, PG, South Florida Water Management District

Interested Organizations and/or Water Professionals

  • Tim Parker, Parker Groundwater
  • Frederick Bloetscher, Ph.D., Florida Atlantic University
  • Jeffrey Davis, PE, CGWP, Integral
  • Neil Burk, PG,

The GWPC ASR-MAR Workgroup has been identified in the U.S. EPA National Water Reuse Action Plan (Action 7.4) as a leader to increase understanding of current aquifer storage and recovery practices. The action item recognizes that there are differences in how aquifer recharge is described, implemented and managed. The action seeks to better understand the range of aquifer storage and recovery practices and corresponding efforts to ensure the protection and sustainability of groundwater resources. The GWPC Workgroup will facilitate meetings to study and find solutions to the challenges currently limiting the use of Enhanced Aquifer Recharge (EAR) and ASR-MAR.

A project of the GWPC ASR-MAR Work Group, the ASR-MAR Library is an easily searchable collection of materials related to ASR-MAR. As the collection grows, it is our hope that this resource will be useful to regulators, water managers, and practitioners. The library will aim to facilitate increased understanding of current ASR issues and practices.

Recorded Webinars

Webinar: SWIFT Managed Aquifer Recharge: From Influent to the Aquifer and Everything In Between
Featuring: Dan Holloway, Project Manager and Hydrogeologist, Hampton Roads Sanitation District

Webinar: Integrating Surface Water Management and Managed Aquifer Recharge: Case Study from a USACE-OCWD Partnership
Featuring: William Logan | Director, International Center for Integrated Water Resources Management (ICIWaRM), USACE, Andrew M. O’Reilly, Ph.D. | Research Hydrologist, Watershed Physical Processes Research Unit, National Sedimentation Laboratory, & Adam Hutchinson, PG, CHG | Recharge Planning Manager, Orange County Water District, California
August 14, 2023

On Farm Implementation and Economics of Agricultural MAR
Featuring: Michele Reba, PhD, PE | Research Hydrologist, Acting Research Leader | USDA Agricultural Research Service, Delta Water Management Research Unit & Lucia Levers, PhD | Sustainable Agricultural Water Systems | USDA Agricultural Research Service, California
March 7, 2023

ASR-MAR in Agriculture
Featuring: Andrew M. O’Reilly (Andy), USDA, Agricultural Research Service & Scott A. Bradford, Ph.D., USDA, ARS SAWS Unit
October 3, 2022

Presentations (PDF)

2022 State Summit Webinar Series on Water Reuse – Session 1: Aquifer Storage and Recovery-Managed Aquifer Recharge
Featuring: Chi Ho Sham, ERG; Lorrie Council, TWDB, Karen Feret, US EPA, and Dan Yates, GWPC
May 25, 2022
ASR in Oklahoma: From No to Go
Featuring: Hillary Young, OK DEQ; Chris Neel, OK Water Resources Board; Doug Beak, Robert S. Kerr Environmental Research Center
Tuesday, April 19 | 1 p.m. – 2:30 p.m. (Central)
Virtual Field Trip: Provo, Utah ASR Projects
Featuring: Jeff Davis, Barr Engineering
September 2021

Guidance for Understanding & Minimizing Arsenic Mobilization in Aquifer Storage & Recovery
Featuring: Sarah Fakhreddine, Ph.D., and Charles Werth, Ph.D., The University of Texas at Austin
Thursday, Dec. 2, 2021
Presentations (PDF)

ASR-MAR Webinar: Tools for Planning, Development, & Improvement of Aquifer Storage and Recovery Projects: Siting & Recovery Efficiency Assessment
Featuring: TWDB and TCEQ
Tuesday, July 27, 2021
Presentations (PDF)
Featuring: Justin Mattingly, Julie Blue, and Kara Goodwin
Tuesday, February 9, 2021
Presentations (PDF)

Managed Aquifer Recharge in California – Long-Term Projects and New Emphasis Under the New Groundwater Law
Featuring: Timothy Parker, Parker Groundwater
Thursday, November 12, 2020

Aquifer Storage & Recovery and Aquifer Recharge Wells in Florida

Featuring: Joe Haberfeld, P.G., Florida DEP
Thursday, August 6, 2020

Connect With Us

Interested in finding out more and/or becoming involved with the ASR-MAR work group? Reach out and a member of our staff or leadership team will be in touch.