As water and wastewater utilities face the threat of contamination and disruption of service from
terrorism and vandalism, it is critical that they not only conduct vulnerability assessments, but more
importantly that they have an emergency operations plan. Indeed, the Public Health Security and
Bioterrorism Response Act (HR 3448) requires that communities develop and/or update their
emergency operations plan (EOP) so that the plan incorporates the results of their vulnerability
assessments. In today's world, it is becoming clear that there is no longer a question of whether
natural, accidental, and intentional disasters will occur, but instead a question of when they will occur.
Unfortunately, a survey released by the National Association of Counties showed that only 22 percent
of counties with a population of less than 10,000 had specific EOPs to deal with terrorist activities.
Smaller communities with limited resources should strongly consider implementing mutual aid
agreements with larger, neighboring communities. By doing so, they can help prevent, or at least
minimize, disaster events and in the process, better protect the public health and safety.
This paper highlights how a water distribution modeling tool can be used to respond to contamination
in the distribution system. Includes figures.