An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

About EPA

About the Office of Water

What We Do

The Office of Water (OW) ensures drinking water is safe, and restores and maintains oceans, watersheds, and their aquatic ecosystems to protect human health, support economic and recreational activities, and provide healthy habitat for fish, plants and wildlife.

OW is responsible for implementing the Clean Water Act and Safe Drinking Water Act, and portions of the Coastal Zone Act Reauthorization Amendments of 1990, Resource Conservation and Recovery Act, Ocean Dumping Ban Act, Marine Protection, Research and Sanctuaries Act, Shore Protection Act, Marine Plastics Pollution Research and Control Act, London Dumping Convention, the International Convention for the Prevention of Pollution from Ships and several other statutes.

Headquartered in Washington, D.C., the Office of Water works with the ten EPA regional offices, other federal agencies, state and local governments, American Indian tribes, the regulated community, organized professional and interest groups, land owners and managers, and the public-at-large. OW provides guidance, specifies scientific methods and data collection requirements, performs oversight and facilitates communication among those involved. OW helps the states and American Indian tribes to build capacity, and water programs can be delegated to them for implementation.

Documents Related to Our Mission

You may need a PDF reader to view some of the files on this page. See EPA's PDF page to learn more.


The Office of Water includes:

Immediate Office of the Assistant Administrator for Water (IO)

What We Do

Under the direction of the Assistant Administrator, the Immediate Office performs a variety of policy, communications, resources management, and operational functions for managing the National Water Program. The IO also works on broad or emerging issues in coordination with its program offices and other parts of EPA.

IO Organization

Dave Ross, Assistant Administrator 
Dennis Lee Forsgren, Jr.,  Deputy Assistant Administrator 
Anna Wildeman, Principal Deputy Assistant Administrator 
Benita Best-Wong,  Principal Deputy Assistant Administrator 
Dr. Owen McDonough, Senior Science Advisor

Top of Page

Office of Ground Water and Drinking Water (OGWDW)

What We Do

OGWDW, together with states, tribes, and our many partners, protects public health by ensuring safe drinking water and protecting ground water. We oversee implementation of the Safe Drinking Water Act.  We:
  • develop and help implement national drinking water standards;
  • oversee and assist funding of state drinking water programs and source water protection programs;
  • help small drinking water systems;
  • protect underground sources of drinking water through the Underground Injection Control Program; and
  • provide information about drinking water quality to the public.
Programs and Projects Managed by OGWDW

Mail code: 4601M | EPA mailing addresses
Location: EPA Headquarters at Washington, D.C. Federal Triangle campus

OGWDW Organization

Jennifer McLain, Acting Director
  • Phone: 202-564-4029
  • Email:
Yu-Ting Guilaran, Acting Deputy Director
  • Phone: 202-564-6591
  • Email:

The Office of Ground Water and Drinking Water includes:

  • Standards and Risk Management Division
    Eric Burneson, Director
    • Phone: 202-564-5250
    • Email:
  • Drinking Water Protection Division
    Anita Maria Thompkins, Director
    • Phone: 202-564-3751
    • Email:
  • Water Security Division
    David Travers, Director
    • Phone: 202-564-4638
    • Email:

Top of page

Office of Science and Technology (OST)

What We Do

OST works with states, tribes, and other stakeholders to develop recommended safe water quality levels for toxics, nutrients, and pathogens to help ensure our nation's waters can be used for fishing, swimming, and drinking water. OST also develops national economically and technologically achievable performance standards to address water pollution from industry.  

Programs managed by OST

Mail code: 4301M | EPA mailing addresses
Location: EPA Headquarters at Washington, D.C. Federal Triangle campus

OST Organization

Deborah Nagle, Director 
  • Phone: 202-566-0430
  • Email:
Jeff Lape, Deputy Director 
  • Phone: 202-566-0430
  • Email:

The Office of Science and Technology includes:

  • Engineering and Analysis Division
    Rob Wood, Director
    • Phone: 202-566-1822
    • Email:
  • Standards and Health Protection Division
    Sara Hisel-McCoy, Director
    • Phone: 202-566-1649
    • Email:
  • Health and Ecological Criteria Division
    Betsy Behl, Director
    • Phone: 202-566-0788
    • Email:

Top of page

Office of Wastewater Management (OWM)

What We Do

OWM supports the Clean Water Act by promoting effective and responsible water use, wastewater treatment, disposal and management and by encouraging the protection and restoration of watersheds. We provide regulatory standards, voluntary management approaches, and financial and technical assistance to states, tribes, communities, and regulated entities to protect human health and aquatic ecosystems, reduce flooding, and protect the nation’s infrastructure investment.

View OWM's Annual Reports.

Programs and Projects Managed by OWM

Mail code: 4201M | EPA mailing addresses
Location: EPA Headquarters at Washington, D.C. Federal Triangle campus

OWM Organization

Andrew Sawyers, Director 
  • Phone: 202-564-0748
  • Email:
Martha Shimkin, Acting Deputy Director
  • Phone: 202-564-1573
  • Email:

The Office of Wastewater Management includes:

  • Water Infrastructure Division
    Raffael Stein, Director
    • Phone: 202-564-5385
    • Email:
  • Water Permits Division
    Sally Gutierrez,  Acting Director
    • Phone: 202-564-9545
    • Email:

Top of page

Office of Wetlands, Oceans and Watersheds (OWOW)

What We Do

OWOW works to protect our freshwater, estuarine, coastal and ocean ecosystems, including watersheds and wetlands. We regulate and monitor ocean dumping and vessel discharges, and reduce aquatic trash and marine debris. We protect water quality and habitats in 28 estuaries around the nation. We control polluted runoff and restore impaired waters.

View OWOW's Annual Reports.

Programs and Projects Managed by OWOW

Mail code: 4501T | EPA mailing addresses
Location: EPA Headquarters at Washington, D.C. Federal Triangle campus

OWOW Organization

John Goodin,  Director
  • Phone: 202-566-1373
  • Email:
Sandra Connors, Deputy Director
  • Phone: 202-564-2231
  • Email:

The Office of Wetlands, Oceans and Watersheds includes:

  • Watershed Restoration, Assessment, and Protection Division
    Tom Wall, Director
    • Phone: 202-564-4179
    • Email:
  • Oceans, Wetlands, and Communities Division
    Brian Frazer, Acting Director
    • Phone: 202-566-1652
    • Email:
  • Planning, Communications, and Resource Management Division
    Barbara Chancey, Director
    • Phone: 202-566-0332
    • Email:

Top of page