The directive identifies the 16 critical infrastructure sectors and designates associated
federal-level Sector-Specific Agencies (SSAs). The SSAs, most of which fall under the
aegis of the Department of Homeland Security (DHS), periodically evaluate the need
for and approve changes to critical infrastructure sectors.
The sectors and SSAs are illustrated below, in Table I:
3
Infrastructure Sectors Associated Federal Sector-
Specific Agencies
1. Chemical Department of Homeland Security
2. Commercial Facilities Department of Homeland Security
3. Communications Department of Homeland Security
4. Critical Manufacturing Department of Homeland Security
5. Dams Department of Homeland Security
6. Defense Industrial Base Department of Defense
7. Emergency Services Department of Homeland Security
8. Energy Department of Energy
9. Financial Services Department of the Treasury
10. Food and Agriculture U.S. Department of Agriculture and
Department of Health and Human
Services
11. Government Facilities Department of Homeland Security and
General Services Administration
12. Healthcare and Public Health Department of Health and Human
Services
13. Information Technology Department of Homeland Security
14. Nuclear Reactors, Materials, and
Waste
Department of Homeland Security
15. Transportation Systems Department of Homeland Security and
Department of Transportation
16. Water and Wastewater Systems Environmental Protection Agency
61
