Picture of Dr. Tolessa Deksissa

Dr. Tolessa Deksissa

D.C. Water Resources Research Institute



Mailing address:

D.C. Water Resources Research Institute
College of Agriculture, Urban Sustainability and Environmental Sciences
University of the District of Columbia
4200 Connecticut Ave., N.W., Bldg. 42 Room 215C
Washington, D.C. 20008


(202) 274 5273




Dr. Tolessa Deksissa received his Ph.D. (Environmental Technology) from Ghent University, Belgium, where he also received his M.S. degree in Environmental Science. Dr. Deksissa studies how environmental pollutants transfer and persist in the environment and their effect on the aquatic ecosystem. His research interest is surface water quality assessment and modeling which ranges from conventional pollutants or nutrients through toxic organic contaminants, such as pesticides, pharmaceutical and personal care products. His scientific findings have been published in peer-reviewed journals and conference proceedings.

Joining UDC/AES and the Water Resources Research Institute (WRRI) in 2006 as a Research Associate, he initiated several research projects. He is currently working on several water quality projects, including research capacity building in AES and DC WRRI. In collaboration with the School of Engineering and Applied Sciences (SEAS) and the Department of Biological and Environmental Science, he has successfully established two state-of-the-art research laboratories, i.e. water quality testing laboratory and environmental modeling and simulation laboratory. His ongoing research projects include assessment of fate and transport of emerging contaminants and other organic compounds in the environment, modeling of integrated urban wastewater system, and pesticide residue analysis in urban community gardens.

Dr. Deksissa is an active member of local, national and international scientific societies, including the Ecological Society of America, Society of Environmental Toxicology and Chemistry (SETAC), International Water Association (IWA), and Water Environment Federation (WEF).