Critical Infrastructure Sectors

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There are 16 Critical Infrastructure Sectors whose assets, systems, and networks, whether physical or virtual, 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 21 (PPD-21): Critical Infrastructure Security and Resilience advances a national policy to strengthen and maintain secure, functioning, and resilient critical infrastructure.

The Critical Infrastructure Sectors are:

Chemical SectorCommercial Facilities SectorCommunications Sector Critical Manufacturing SectorDams Sector Defense Industrial Base SectorEmergency Services SectorEnergy SectorFinancial Services SectorFood and Agriculture SectorGovernment Facilities SectorHealthcare and Public Health SectorInformation Technology SectorNuclear Reactors, Materials, and Waste SectorTransportation Systems SectorWater and Wastewater Systems SectorSource: Critical Infrastructure Sectors