S.S. Papadopulos and Associates, Inc

S.S. Papadopulos and Associates, Inc. was established in 1979 to provide professional consulting services for groundwater issues. Since those early years of providing exclusively groundwater expertise, we have grown and evolved with the environmental industry. While groundwater hydrology and hydrogeology still form the cornerstone of SSP&A`s expertise, we have developed a recognized practice in the related areas of contaminant studies, remediation, geochemistry, and surface-water hydrology.

Company details

7944 Wisconsin Ave. , Bethesda , MD 20814-3620 USA

Locations Served

Business Type:
Software vendor
Industry Type:
Soil and Groundwater
Market Focus:
Internationally (various countries)
Year Founded:

SSP&A's reputation for technical excellence is due to the nature and experience of our people. The individual experience of our key personnel ranges from 10 to 40 years of working on groundwater, environmental, and remediation investigations.

Our key personnel

  • Have individually been honored with numerous awards and recognition for technical achievements and service in their representative scientific communities;
  • Are sought to serve on nationally- and internationally-recognized committees to evaluate and address groundwater and water-resource issues;
  • Have authored textbooks on contaminant transport modeling
  • Are at the cutting-edge of groundwater and surface-water modeling and software development;
  • Participate in high-visibility groundwater and water-resource projects throughout the united states and abroad.

SSP&A has proactively recruited a highly qualified, nationally recognized staff of specialists who bring a combination of state-of-the-art knowledge and multi-year experience.

The principals of the firm are Stavros S. Papadopulos, Steven Larson, Charles B. Andrews, Deborah L. Hathaway, Remy J.-C. Hennet, and Matthew J. Tonkin.

Other Key Personnel include Michael T. Rafferty, and Christopher J. Neville. More information and full resumes for each of these staff can be accessed on the key personnel page.

SSP&A is committed to improving the quality of life in the communities in which our employees live and work.

The company matches employee’s contributions to non-profit organizations that help the less fortunate and organizations that work to improve the quality of life in our communities. The company also encourages employees to be actively involved in water resource related community organizations and other community activities.


Traffic Calming Measures
Dominique Sorel was nominated for recognition at a February, 2009 event staged by the Council for Economic and Social Development (CDEC) called “Recognizing movers and shakers in Cote-des-Neiges/Notre-Dame-de-Grace (CDN/NDG) neighborhoods' in Montreal, Quebec. Dominique is an NDG resident and has been working for many years for the implementation of traffic-calming measures. She has presented briefs on pedestrian safety and traffic and has done a great deal to raise awareness among the general public. She is a member of the Board of Directors of the Urban Ecology Centre.

Alternate Modes of Transportation
SSP&A encourages its employees to walk and cycle to work. Bethesda employees Mark Wolff, Jim Cousins, and Charles Andrews were recipients of the Bethesda Bike Spirit Award in 2005, 2006, and 2007, respectively. This award is given annually by the local government to a commuter in the Bethesda area that consistently bicycles to work.

Local Government Involvement
Gil Barth served as an appointed member of the Boulder Water Resource Advisory Board from 2003 to 2007. This board reviews capital improvement projects, utility master plans and advises the City Council on policy issues.

Charles Andrews served as chairman of the Montgomery County, Maryland Water Resources Advisory Group from 2004 to 2007. This advisory group is appointed by the County Council and advises the Council and County Executive on policies, programs and priorities to improve and restore the quality of the County’s streams and groundwater.

Watershed Cleanup
The primary pollutant in many of our urban watershed is trash. Shown below is Charles Andrews directing some volunteers in the cleanup of Rock Creek in Kensington, Maryland in April 2007.


Engineers without Borders
Debbie Hathaway spent a week in a rural village in the Ecuadorian Andes in April, joining an Engineers without Borders team, to improve water delivery within a series of rudimentary potable water supply lines and to evaluate the feasibility of providing dry season irrigation water from a series of partially constructed, also rudimentary, irrigation water lines.

Organizations that have recently received matching grants from SSP&A include:

  • Friends of Rock Creek
  • International Crane Foundation
  • SOME. Feminists for Life. Gaithersburg-Wash. Gr. VFD
  • Community Tax Aid
  • Master Chorale
  • Rio Grande Restoration
  • Neighbors' Consejo
  • Friends of the Urban Forest
  • Raphael House
  • East Bay Agency for Children
  • San Francisco Food Bank
  • A Friendly Manor
  • Habitat For Humanity
  • Trust for Public Lands
  • Larkin Street Youth Services
  • Helping Hooves
  • Roadrunner Food Bank
  • Northwest Medical Teams
  • AmeriCares
  • International Red Cross
  • American Red Cross
  • American Jewish World Services
  • Veterans for Peace, United Way of America
  • America's Second Harvest
  • Times Relief Fund
  • Department of Geology at the University of Alabama
  • St. Anthony Falls Laboratory at the University of Minnesota