Terrorism and Security Issues Facing the Water Infrastructure Sector / Congressional Research Service, 28 July 2008
PDF - http://www.fas.org/sgp/crs/terror/RL32189.pdf
"Damage to or destruction of the nation’s water supply and water quality infrastructure by terrorist attack or natural disaster could disrupt the delivery of vital human services in this country, threatening public health and the environment, or possibly causing loss of life. Interest in such problems has increased greatly since the September 11, 2001, terrorist attacks in the United States."