Report a Critical Infrastructure Incident
If a significant security incident is detected while in progress, the facility should immediately call local law enforcement and emergency responders via 9-1-1. Similarly, if the event has concluded but an immediate response is still necessary, the facility should immediately call 9-1-1.
Once the incident has concluded and the facility has addressed any resulting emergency, the facility should use a nonemergency number to contact local first responders and other federal, state, and local law enforcement entities, as applicable.
Once an incident has concluded and an emergency has been addressed, report significant cyber and physical incidents to CISA Central at email@example.com. CISA Central provides infrastructure 24/7 watch and warning function and gives all critical infrastructure owners and operators a means to connect with and receive information from all CISA services.
Chemical Facility Anti-Terrorism Standards (CFATS) Chemical Facility Security Tip Line: 877-394-4347 (877-FYI 4 DHS) or email CFATSTips@hq.dhs.gov. You may report concerns on voicemail anonymously. If you want a return call, leave your name and number. Calls to this tip line involve the CFATS regulation at your facility or another facility. For more information, visit the Report a Potential CFATS Violation webpage.
If you see suspicious activity, please report it to your local police department. If you are experiencing an emergency, please call 911. We all play a role in keeping our communities safe, "If You See Something, Say Something®" is a national campaign that raises public awareness of the signs of terrorism and terrorism-related crime, and how to report suspicious activity to state and local law enforcement.
CISA Regional Contacts
CISA supports Federal, State, local, tribal and territorial government mission partners and the private sector stakeholder community through regional offices that provide a range of cyber and infrastructure security capabilities.
Click on the regions below to contact your regional office.
Kentucky, Tennessee, North Carolina, South Carolina, Mississippi, Alabama, Georgia, and Florida
Arizona, Nevada, California, Guam, American Samoa, Commonwealth of Northern Mariana Islands (CNMI) and Hawaii
CISA Mailing Address
ATTN: Firstname Lastname -or- Office Title
CISA External Affairs - Mailstop 0630
Cybersecurity and Infrastructure Security Agency
1110 N. Glebe Road 20598-0630
Connect with CISA
Enter your email via the GovDelivery link to subscribe to email updates on a variety of CISA.gov topics.
CISA maximizes its resources through unified, integrated, and cohesive stakeholder activities by engaging in speaking events and conferences. Submit your request for a CISA speaker today.
Service of Process
Notice: Effective immediately and until further notice, the Cybersecurity and Infrastructure Security Agency (CISA), Office of the Chief Counsel is not accepting personal service of process for actions against the agency or its personnel in their official capacity, due to the on-site staffing shortages caused by the COVID-19 circumstances. The following procedures do not modify the requirements of Federal Rules of Civil Procedure, Rule 4(i)(3) regarding service on an officer or employee sued in his or her individual capacity and should not be used in any action to attempt to perfect service upon any agency officer or employee sued in his or her individual capacity.
Service of Process of Summons and Complaints*
Pursuant to Federal Rules of Civil Procedure, Rule 4(i)(2), mail summons and complaints against the agency or its personnel in their official capacity only by registered or certified mail, to:
Office of the Chief Counsel
CISA – NGR STOP 0645
To aid in prompt handling of any summons and complaint, parties also are encouraged to email a copy to firstname.lastname@example.org.
Service of Process for Subpoenas
Email subpoenas against the agency or its personnel in their official capacity only to email@example.com. You may also send a courtesy copy by registered or certified mail to the address above.
* This does not apply to a request to commence administrative adjudication proceedings pursuant to 6 CFR 27.310(b) of the Chemical Facility Anti-Terrorism Standards (CFATS).
CISA is committed to providing accessible Information and Communication Technology (ICT) to individuals with disabilities, including members of the public and federal employees, by meeting or exceeding the requirements of Section 508 of the Rehabilitation Act of 1973, as amended (29 U.S.C. 794d).
For more information, please visit our Accessibility page.
Provide Feedback or Make Complaints to DHS
The U.S. Department of Homeland Security has many avenues for the public to provide feedback and make complaints involving DHS employees or programs, alleged violations of civil rights and civil liberties, immigration filing, travel redress, and other types of grievances.