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Water Safety


Dr. Rolf Halden describes the importance of water in the United States, how water is processed, and the governmental regulations that protect the processing system.


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Topic 1: Water Safety

  • Part 1: Introduction
  • Part 2: Drinking Water Treatment
  • Part 3: Wastewater Treatment and Infrastructure Protection


Rolf HaldenRolf Halden is a faculty member of the Johns Hopkins Bloomberg School of Public Health, with a primary appointment in the Department of Environmental Health Sciences and a joint appointment in the Department of Geography and Environmental Engineering of the Whiting School of Engineering. His research and teaching interests are in the area of waterborne chemical and biological agents of public health concern. Dr. Halden is a founding member of the Johns Hopkins Center for Water and Health and an active member of the Johns Hopkins Center for Public Health Preparedness, the Johns Hopkins NIEHS Center in Urban Environmental Health, and the Johns Hopkins University Institute of NanoBioTechnology. From 2002-2005, Dr. Halden served on the Maryland State Water Quality Advisory Committee as a governor-appointed public interest representative. He also served as alternate member of the 2004 Maryland Water Security and Wastewater Systems Advisory Council.

Dr. Halden’s peer-reviewed publications primarily concentrate on the remediation of contaminated water resources and on analytical chemistry protocols for the detection of microorganisms and organic chemicals in drinking water resources. Prior to joining the faculty at Hopkins, Dr. Halden was environmental scientist and project manager at the Lawrence Livermore National Laboratory in Livermore, CA, where he oversaw cleanup operations at a section of a (Superfund) priority cleanup site. Dr. Halden is a certified professional engineer and holds a doctoral degree and a Master’s degree in Civil Engineering from the University of Minnesota, and a Master’s degree in Biology from the Technical University of Braunschweig, Germany.

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