Environmental Health and Safety

Homeland Security

  • Information On The New National Terrorism Advisory System (NTAS):

     On April 20, 2011, U.S. Department of Homeland Security (DHS) Secretary Napolitano announced the implementation of the new National Terrorism Advisory System (NTAS), which replaces the color-coded Homeland Security Advisory System (HSAS) in use since 2002 (e.g., threat level orange).  This new system will more effectively communicate information about terrorist threats by providing timely, detailed information to the public, government agencies, first responders, airports and other transportation hubs, and the private sector. Also, attached is a copy of the NTAS Public Guide which serves as a reference for NTAS (available at the website below).
    NTAS Alerts will only be issued when credible information is available. These alerts will include two types of threat information:

    1) A clear statement that there is an imminent threat (warning of a credible, specific, and impending terrorist threat against the United States); or

    2) An alert of an elevated threat (warning of a credible terrorist threat against the United States).

    Using available information, the alerts will provide a concise summary of the potential threat, information about actions being taken to ensure public safety, and recommended steps that individuals, communities, businesses and governments can take to help prevent, mitigate or respond to the threat.

    Dependent upon the nature of the threat, NTAS alerts will be sent directly to law enforcement or affected areas of the private sector, while in others, alerts will be issued more broadly to the American people through both official and media channels. NTAS Alerts will be issued through state, local and tribal partners, the news media and directly to the public via the following channels:

    The public can also expect to see alerts in places, both public and private, such as transit hubs, airports and government buildings.