Official website of the Department of Homeland Security
Critical Infrastructure
What Is Critical Infrastructure?
Critical infrastructure is the backbone of our nation's economy, security, and health.
What Is Security and Resilience?
Learn what security and resilience mean from a critical infrastructure perspective.
What We Do
The Department of Homeland Security works with businesses and communities across the United States to prepare and recover from whatever we are faced with.
What You Can Do
Securing critical infrastructure is a shared responsibility.
Critical Infrastructure: Chemical Security
Chemical Facility Anti-Terrorism Standards