Critical Infrastructure Sectors

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

DHS was identified as the Chemical Sector Risk Management Agency (SRMA) in Presidential Policy Directive (PPD) 21. CISA performs the Chemical Sector SRMA responsibilities on behalf of DHS. CISA leads the Chemical Sector’s public-private partnership and works with companies to develop tools and resources that enhance the sector’s security and resilience.
Stadium with bright lighting

Commercial Facilities Sector

The Commercial Facilities Sector protects spaces open to the general public against coordinated attacks. CISA offers strategic direction across eight subsectors to improve security and resilience in these locations.
A communication tower in abstract design

Communications Sector

The communications sector has evolved into a complex industry of terrestrial, satellite, and wireless systems with many interdependencies. CISA works with private sector stakeholders to implement the risk management framework to protect all aspects of the communication sector.
Factory scene

Critical Manufacturing Sector

CISA identifies, assesses, prioritizes, and protects manufacturing industries with national significance to prevent and mitigate the impact of manmade or natural disasters.
widescreen photograph of the Hoover Dam

Dams Sector

With more than 90,000 dams in the U.S., the Dams Sector delivers critical water retention and control services. CISA works with sector partners to protect assets from natural disasters, as well as human-caused and technological events.
Aerial view of the Pentagon in Washington DC

Defense Industrial Base Sector

Over 100,000 companies and subtractors supply materials, services, and facilities to the U.S. military. The Defense Industrial Base Sector helps mobilize, deploy, and sustain these military operations around the world.
Fire truck rushing to an emergency in the city

Emergency Services Sector

Supporting millions of skilled personnel with physical and cyber resources, the Emergency Services Sector helps save lives, protect property and the environment, and assist in recovery efforts after emergencies and disasters.
Electric powerplant at sunrise in NYC

Energy Sector

The energy sector protects a multifaceted web of electricity, oil, and natural gas resources and assets to maintain steady energy supplies and ensure the overall health and wellness of the nation.
Boston's financial district buildings

Financial Services Sector

By protecting financial institutions of all sizes from large-scale power outages, natural disasters, and cyber-attacks, the Financial Services Sector protects your financial assets as well as your ability to access and utilize those assets.
Long rows of corn crop in farm field

Food and Agriculture Sector

The food and agriculture sector, including farms, restaurants, and food manufacturing, processing, and storage facilities, is almost entirely privately-owned. CISA provides guidance, resources, and collaboration with interdependent sectors to protect against a range of risks.
US Capitol building with cyber nodes

Government Facilities Sector

Federal, state, local and tribunal government buildings and spaces have differing accessibility restrictions and purposes. The Government Facilities Sector helps these facilities identify their unique risk factors and protect against potential attacks or issues.
Healthcare concept, doctors in hospital with health icons

Healthcare and Public Health Sector

The Healthcare and Public Health Sector focuses on population health and provides the response and recovery actions needed after large-scale hazards such as terrorism, infection disease, and natural disasters.
Abstract cyber image

Information Technology Sector

The nation’s growing dependency on information technology has made the Information Technology Sector mission – to identify and protect against cyber threats and vulnerabilities— more complex and important in the 21st century.
Electric passenger train driving at high speed

Transportation Systems Sector

Moving millions of people and goods across the country every day, the transportation systems sector is exposed to a limitless number of threats and risks. CISA works to protect these systems and ensure a continuity of operations.
Water tower against a blue cloudy sky

Water and Wastewater Systems

Access to clean, healthy water is a requirement for all human activity. Protecting the systems that provide water is of vital importance to the stability and health of the nation and is the mission of the Water and Wastewater Systems Sector.