Campus Alert System
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.
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
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
- Shelter (go to a safe indoor
- Shut (close and lock all doors and
- Listen (tune to KCBS 740 AM or
106.9 FM, KTVU-2)
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.