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Monday - Friday
8:00am - 4:30pm
Please note, during the summer term the District is closed on Fridays.
TEL: (925) 229-1000

Contra Costa Community College District

500 Court Street
Martinez, CA 94553

Campus Alert System

4cd Alert In our county there are a variety of alert methods used to keep the public informed about emergencies or potential emergency situations. We have developed this page to provide you with access to these systems and we encourage you to take full advantage of them.

To view current information about alerts or developing situations that may adversely affect our campuses or facilities, please visit the Alert Bulletins page.

When an alert has been issued or an emergency is in progress, we will make every effort to update the Alert Bulletins page and provide you with the most current information available. We recommend that you save this page in your "Favorites" folder or on your browser desktop to provide quick access during an emergency.

Download: 4CD Alert Flyer

Contra Costa Community College District Campus Alert System (4CD Alert)

The Contra Costa Community College District Campus Alert System (4CD Alert) uses a variety of methods to alert the community and emergency responders whenever a significant life-threatening hazard occurs. The system utilizes outdoor sirens located at the following campuses:

  • Contra Costa College
  • Diablo Valley College
  • Los Medanos College
  • San Ramon Campus

The system will also alert subscribers who register to receive e-mail and/or cell phone text messages.

To subscribe to receive alerts via e-mail and/or cell phone text message, please visit our 4CD Alert Subscription Page.

If you hear the alert siren or receive an alert notification:

  • Shelter (go to a safe indoor location)
  • Shut (close and lock all doors and windows)
  • Listen (tune to KCBS 740 AM or 106.9 FM, KTVU -2 or access the District web page at for further information or instructions)

Sirens are tested on the first Wednesday of every month at approximately 11:00 a.m. During testing, the sirens sound for approximately 30 seconds. If the sirens are heard at any other time or the sound continues for longer than one minute, take immediate protective action.

For more information about 4CD Alert, please visit our 4CD Alert FAQ Page.

U.S. Homeland Security Advisory System

The U.S. Homeland Security Advisory System uses color-coded threat levels to communicate with public safety officials and the public. The system identifies the threat level for a region (or regions) and the protective measures that may be implemented to reduce the likelihood or impact of an attack.

To view the current threat level or learn more about this system, please visit the United States Department of Homeland Security website.

For More Information

If you have other questions or would like to learn more about the 4CD Campus Alert System, please contact:

Officer Teddy M. Terstegge
Emergency Services Coordinator
Los Medanos College Station
2700 East Leland Road
Pittsburg, CA 94565
(925)439-2181 Ext. 3110

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