Critical Infrastructure Sectors

Critical infrastructure sectors are those assets, systems, and networks, whether physical or virtual, that are considered so vital to the United States that their incapacitation or destruction would have a debilitating effect on security, national economic security, national public health or safety, or any combination thereof.  Presidential Policy Directive/PPD-21 (PPD-21), Subject: Critical Infrastructure Security and Resilience, advances a national policy to strengthen and maintain secure, functioning and resilient critical infrastructure.

InfraGard members are provided with information to assist them in protecting critical infrastructure assets.  In turn, they are encouraged to provide information to the FBI, thereby facilitating its responsibility to detect, deter and investigate acts of terrorism and other crimes.

PPD-21 identifies the following 16 sectors as critical infrastructure sectors and their sector-specific agencies: