CoCoCWS

CoCoCWS The Community Warning System (CWS) is the all-hazard public warning notification system for Contra Costa County.

CWS is a partnership of government, industry, media, and the CAER group. The Community Warning System (CWS) is a comprehensive, integrated system for alerting people in Contra Costa County to imminent threats to their life or health. CWS capabilities include:
-Sirens near major industrial facilities and in other special safety zones
-Countywide telephone notification system
-NOAA Weather Radio
-Ra

dio, TV and cable via the federal Emergency Alert System (EAS)
-Cell phone notification service
-NEW Twitter alerts ~ Follow CoCoCWS

ALL CLEAR for Law Enforcement Activity in OAKLEY. More info at CWSAlerts.com.This is a message from CONTRA COSTA SHERIFF...
01/13/2026

ALL CLEAR for Law Enforcement Activity in OAKLEY. More info at CWSAlerts.com.

This is a message from CONTRA COSTA SHERIFF'S OFFICE. As of 4:20PM, An `All Clear` has been issued for the Law Enforcement Activity in OAKLEY. Please feel free to resume normal activities.

(1916763)
For more information go to: http://www.CWSAlerts.com

Lockdown due to Law Enforcement Activity in OAKLEY. More info at CWSAlerts.com.This is a message from CONTRA COSTA SHERI...
01/12/2026

Lockdown due to Law Enforcement Activity in OAKLEY. More info at CWSAlerts.com.

This is a message from CONTRA COSTA SHERIFF'S OFFICE. As of 11:40AM, there is currently law enforcement activity in OAKLEY near NEROLY ROAD, OAKLEY ROAD AND EMPIRE AVENUE. People in the area are advised to LOCKDOWN IN THE NEAREST PLACE OF SAFETY. Go inside, close and lock all windows and doors. Stay off the phone and do not call 9 1 1 unless you need to report a life-threatening emergency. To report suspicious activity, contact CONTRA COSTA SHERIFF'S OFFICE at (925)646-2441. Stay indoors until you receive further official instructions.

(1916752)
For more information go to: http://www.CWSAlerts.com

Concord PD: ALL CLEAR near Ward Way in Concord. More at CWSAlerts.com.This is a message from Concord Police. An 'ALL CLE...
11/23/2025

Concord PD: ALL CLEAR near Ward Way in Concord. More at CWSAlerts.com.

This is a message from Concord Police. An 'ALL CLEAR' has been issued for the lockdown near Ward Way in Concord. Please feel free to resume normal activities.

(1914446)
For more information go to: http://www.CWSAlerts.com

Concord PD: Lockdown due to Law Enforcement Activity in CONCORD. More at CWSAlerts.com.This is a message from Concord Po...
11/23/2025

Concord PD: Lockdown due to Law Enforcement Activity in CONCORD. More at CWSAlerts.com.

This is a message from Concord Police. There is currently law enforcement activity in the 2500-2600 block or Ward Way in Concord. People in this area are advised to LOCKDOWN IN THE NEAREST PLACE OF SAFETY. Go inside, close and lock all windows and doors. Stay off the phone and do not call 9 1 1 unless you need to report a life-threatening emergency. Stay indoors until you receive further official instructions.

(1914432)
For more information go to: http://www.CWSAlerts.com

ALL CLEAR in the Diablo Plaza area of Walnut Creek. More: CWSAlerts.com.8:20 pm This is a message from the CONTRA COSTA...
10/23/2025

ALL CLEAR in the Diablo Plaza area of Walnut Creek. More: CWSAlerts.com.

8:20 pm This is a message from the CONTRA COSTA FIRE PROTECTION DISTRICT. An 'All Clear' has been issued for the shelter in place incident in the Diablo Plaza area of Walnut Creek. Feel free to resume normal activities.

(1265392)
For more information go to: http://www.cwsalerts.com

Shelter in Place near Mount Diablo Plaza in Walnut Creek. More: CWSAlerts.com.6:33 pm This is a message from the CONTRA ...
10/23/2025

Shelter in Place near Mount Diablo Plaza in Walnut Creek. More: CWSAlerts.com.

6:33 pm This is a message from the CONTRA COSTA FIRE PROTECTION DISTRICT. An electric vehicle fire is causing extremely hazardous smoke to emit from the Mount Diablo Plaza parking garage. The danger will be much less indoors. If you are near the Mount Diablo Plaza garage, go inside, and close all windows and doors. Turn off all heaters, air conditioners, and fans. Unless you are using your fireplace, close your fireplace dampers and vents. Cover any cracks around doors or windows with tape or damp towels. Stay off the phone unless you need to report a life-threatening emergency at your location. Remain sheltered indoors until you receive further official instructions. Electric vehicle fires can burn for long periods of time.

(1265385)
For more information go to: http://www.cwsalerts.com

All Clear for Public Health Advisory in parts of Richmond & San Pablo. CWSAlerts.com.This is a message from Contra Costa...
07/29/2025

All Clear for Public Health Advisory in parts of Richmond & San Pablo. CWSAlerts.com.

This is a message from Contra Costa Health. An `All Clear` has been issued for the hazardous materials incident in parts of Richmond and San Pablo. There was a mistaken activation from the Chevron Refinery. Please feel free to resume normal activities.

(1260304)
For more information go to: http://CWSAlerts.com

Public Health Advisory for parts of Richmond & San Pablo. Info at CWSAlerts.com.This is a Public Health Advisory Message...
07/29/2025

Public Health Advisory for parts of Richmond & San Pablo. Info at CWSAlerts.com.

This is a Public Health Advisory Message from Contra Costa Health for Richmond and San Pablo. An incident at the Chevron Refinery in Richmond could affect individuals with respiratory sensitivities. Most people will not be affected. Eye, skin, nose or throat irritation may be possible for some people in the affected area. If people experience any irritation, advise them to go inside and rinse any irritated area of their body with water. Handle this as advisory information only. For more information go to CWSAlerts.com.

(1260279)
For more information go to: http://CWSAlerts.com

ALL CLEAR for Lockdown due to Law Enforcement Activity in DANVILLE. More info CWSAlerts.com.This is a message from The D...
07/21/2025

ALL CLEAR for Lockdown due to Law Enforcement Activity in DANVILLE. More info CWSAlerts.com.

This is a message from The DANVILLE POLICE DEPARTMENT. As of 2:50am, an ALL CLEAR has been issued for the LOCKDOWN due to law enforcement activity for residents in DANVILLE. Please feel free to resume your normal activities.

(1259822)
For more information go to: http://www.CWSAlerts.com

Lockdown due to Law Enforcement Activity in DANVILLE on ST NORBURT DRIVE. More info CWSAlerts.com.This is a message from...
07/21/2025

Lockdown due to Law Enforcement Activity in DANVILLE on ST NORBURT DRIVE. More info CWSAlerts.com.

This is a message from The DANVILLE POLICE DEPARTMENT. There is currently law enforcement activity in DANVILLE on NORBURT DRIVE. People in the area of ST. NORBURT DRIVE and EL CAPITAN DRIVE are advised to LOCKDOWN IN THE NEAREST PLACE OF SAFETY. Go inside, close and lock all windows and doors. Stay off the phone and do not call 9 1 1 unless you need to report a life-threatening emergency. To report suspicious activity, contact The DANVILLE POLICE DEPARTMENT (925)314-3700 at. Stay indoors until you receive further official instructions.

(1259818)
For more information go to: http://www.CWSAlerts.com

ALL CLEAR for Public Health Advisory in EAST COUNTY due to SMOKE from FIRE.CWSAlerts.com.This message is from The CONTRA...
07/16/2025

ALL CLEAR for Public Health Advisory in EAST COUNTY due to SMOKE from FIRE.CWSAlerts.com.

This message is from The CONTRA COSTA FIRE PROTECTION DISTRICT. As of 7:45pm, an ALL CLEAR has been issued for the public health ADVISORY due to SMOKE from a nearby FIRE for residents in OAKLEY, BRENTWOOD, BYRON & DISCOVERY BAY. Please feel free to resume your normal activities.

(1259595)
For more information go to: http://CWSAlerts.com

Public Health Advisory OAKLEY, BRENTWOOD, BYRON, DISCOVERY BAY due to SMOKE from FIRE.CWSAlerts.com.This message is from...
07/16/2025

Public Health Advisory OAKLEY, BRENTWOOD, BYRON, DISCOVERY BAY due to SMOKE from FIRE.CWSAlerts.com.

This message is from The CONTRA COSTA FIRE PROTECTION DISTRICT. As of 5:45pm, this is a public health ADVISORY for residents in OAKLEY, BRENTWOOD, BYRON & DISCOVERY BAY. Due to a nearby FIRE, people with respiratory sensitivities should close all doors and windows due to SMOKE.Handle this as advisory information only. More info at CWSAlerts.com.

(1259560)
For more information go to: http://CWSAlerts.com

Address

1850 Muir Road
Martinez, CA

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+19256550111

Website

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