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Interagency Modeling and Atmospheric Assessment Center

The Interagency Modeling and Atmospheric Assessment Center (IMAAC) coordinates and disseminates federal atmospheric dispersion modeling and hazard prediction products. These products provide the federal position during actual or potential incidents involving hazardous material releases. Through plume modeling analysis, the IMAAC provides emergency responders with predictions of hazards associated with atmospheric releases to aid in the decision making process to protect the public and the environment.

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DIGITAL MEDIA TOOLKIT

IMAAC's digital media toolkit helps partners communicate with first responder audiences. Download and share sample social media and newsletter content, graphics, web assets and talking points.

Open the Toolkit

Access to IMAAC Products

Visit the Homeland Security Information Network (HSIN) to access IMAAC products. To open a HSIN account, please contact the HSIN Helpdesk at 1-866-430-0162 (available 24/7) or send an email to HSIN.HelpDesk@hq.dhs.gov requesting a HSIN account and access to the IMAAC community of interest.

IMAAC Support

The IMAAC provides plume models for real-world emergencies involving significant hazardous atmospheric releases and atmospheric modeling support for National Level Exercises and local exercises. State, local, and federal officials can request IMAAC support by contacting the IMAAC Technical Operations Hub, managed by the Defense Threat Reduction Agency, at (703) 767-2003 or emailing IMAAC@fema.dhs.gov.

For general inquiries, please send an email to imaacinquiries@fema.dhs.gov.

Partners

Led by FEMA, the IMAAC is a partnership among seven federal agencies, each with supporting capabilities and/or responsibilities for plume modeling. These agencies include: