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A Roadmap for Recovery/Decontamination Plan for Critical Infrastructure after CBRN Event Involving Drinking Water Utilities: Scoping Study

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Technical Report

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Environment Canada Ottawa, ON Canada

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The vulnerability of drinking water distribution systems DWDS to deliberate CBRN contamination is one of the main concerns for regulatory agencies and water utilities around the world. While water itself can easily be treated, the elements of DWDS may become contaminated and remain a source of secondary contamination for water over a long period of time. DWDS elements are relatively easily accessible for intruders e.g. through firefighting hydrants, clean water tanks, household service connections. A recent study CRTI-3780-2011-30UA-09 compiled available information and identified most persistent potential CBRN contaminants. As found, specific techniques are required for DWDS decontamination because the common procedures used for DWDS cleanup and disinfection are generally ineffective against persistent CBRN contaminants. Recovery of DWDS after CBRN contamination is part of emergency management, along with three other components prevention, preparedness, and response. Guidance documents are needed to support recovery planning process by identifying key issues to be addressed and the relevant information that is required.

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