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  3. Critical Infrastructure Security and Resilience
  4. Critical Infrastructure Sectors
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Critical Infrastructure Sectors

Critical Infrastructure Sectors

  • Chemical Sector
  • Commercial Facilities Sector
  • Communications Sector
  • Critical Manufacturing Sector
  • Dams Sector
  • Defense Industrial Base Sector
  • Emergency Services Sector
  • Energy Sector
  • Financial Services Sector
  • Food and Agriculture Sector
  • Government Services and Facilities Sector
  • Healthcare and Public Health Sector
  • Information Technology Sector
  • Nuclear Reactors, Materials, and Waste Sector
  • Transportation Systems Sector
  • Water and Wastewater Sector

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. This directive supersedes Homeland Security Presidential Directive 7.

Critical Infrastructure Sectors

Chemical facility

Chemical Sector

Stadium with bright lighting

Commercial Facilities Sector

A communication tower in abstract design

Communications Sector

Image of various yellow and gray mechanical arms in a factory setting with various manufacturing-related icons floating around

Critical Manufacturing Sector

widescreen photograph of the Hoover Dam

Dams Sector

Aerial view of the Pentagon in Washington DC

Defense Industrial Base Sector

Fire truck rushing to an emergency in the city

Emergency Services Sector

Electric powerplant at sunrise in NYC

Energy Sector

Boston's financial district buildings

Financial Services Sector

Long rows of corn crop in farm field

Food and Agriculture Sector

US Capitol building with cyber nodes

Government Services and Facilities Sector

Healthcare concept, doctors in hospital with health icons

Healthcare and Public Health Sector

Motherboard with security locks; representation of cybersecurity

Information Technology Sector

A photo of an advanced test reactor

Nuclear Reactors, Materials, and Waste Sector

Electric passenger train driving at high speed

Transportation Systems Sector

Water tower against a blue cloudy sky

Water and Wastewater Systems

Whistleblower Retaliation

If you work in any of these Critical Infrastructure Sectors and you feel you’ve been retaliated against for raising concerns to your employer or regulators about critical infrastructure, you may contact the U.S. Department of Labor Occupational Safety and Health Administration (OSHA).  OSHA’s Whistleblower Protection Program enforces over 20 anti-retaliation statutes that may protect your report. More information can be found at the link below. Complaints with OSHA can be filed online.

Learn more
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