Who We Are

Potomac River Basin Drinking Water Source Protection Partnership

The founding members of the Partnership include water utilities serving nearly 5 million residents of the Potomac basin as well as agencies representing Virginia, West Virginia, Maryland, Pennsylvania, the District of Columbia, and the U.S. EPA. The effort to form the Partnership began after the completion of source water assessments for the Washington, D.C., metropolitan area, when the water suppliers who share the Potomac River as their source met with state and federal representatives to share their results and discuss next steps. After a series of meetings, the concept of the Potomac Drinking Water Source Protection Partnership evolved from the shared vision of all the stakeholders to protect drinking water in the basin.


The following water suppliers (including local jurisdictions that operate drinking water treatment facilities) and government agencies have formally joined the Partnership by signing a resolution:

Water Suppliers

  • Berkeley County Public Service Water District, West Virginia
  • City of Frederick, Maryland
  • City of Hagerstown, Maryland
  • Corporation of Harpers Ferry
  • DC Water
  • City of Rockville, Maryland
  • Fairfax Water
  • Frederick County, Maryland
  • Loudoun Water
  • Town of Leesburg, Virginia
  • Town of Romney, West Virginia
  • Town of Shepherdstown, West Virginia
  • Washington Aqueduct Division of the U.S. Army Corps of Engineers
  • Washington County, Maryland
  • WSSC Water

Government Agencies

  • District of Columbia Department of Energy & Environment (DOEE)
  • Interstate Commission on the Potomac River Basin (ICPRB)
  • Maryland Department of the Environment (MDE)
  • Pennsylvania Department of Environmental Protection (PA DEP)
  • United States Environmental Protection Agency, Region 3 (EPA Region 3)
  • United States Geological Survey (USGS)
  • Virginia Department of Environmental Quality (VADEQ)
  • Virginia Department of Health (VDH)
  • West Virginia Department of Health and Human Resources (WV DHHR)
  • West Virginia Department of Environmental Protection (WV DEP)

In addition, the Metropolitan Washington Council of Governments actively participates with the Partnership.

Become a Member

The Partnership encourages all water utilities to join and help protect the sources of drinking water. Peruse the annual reports to learn about the exciting work the Partnership has done in the past and check out the DWSPP pamphlet to learn about the advantages of membership.

For more information, please contact the Interstate Commission on the Potomac River Basin who serves as the Partnership’s coordinator.