3 of 9 Contra Costa County agencies are fully encrypted
9 public safety agencies in Contra Costa County, California have encrypted their radio communications.
Radio encryption in Contra Costa County
Nine Contra Costa County agency records all list P25 AES-256, but only two, Concord Police and San Ramon Police, have been verified against RadioReference system data. The other seven, including the Contra Costa County Sheriff and the Antioch, Brentwood, Hercules, Martinez, Pinole and Richmond police departments, are unverified, so read them cautiously. Four of the nine encrypt tactical channels only rather than everything. The trunked systems catalogued in the county are largely commercial or institutional rather than municipal: La Rue Communications on Mt Diablo, Caltrans District 4 South, Lawrence Livermore National Laboratory, Fisher Wireless TeamTalk, TelePath Corporation, The Radio Guys, Silke Communications FleetNet and RFC Wireless. Only one of their 32 catalogued talkgroups is encrypted, leaving 31 in the clear.
Compiled from this site's agency database. Encryption status changes without notice — confirm any specific agency on RadioReference.
Radio systems serving Contra Costa County
- La Rue Communications (Mt Diablo)
- East Bay Regional Communications System (EBRCS)
- Caltrans (District 4 - South)
- Lawrence Livermore National Laboratory
- Fisher Wireless TeamTalk
- TelePath Corporation (Connect Plus)
- The Radio Guys
- Silke Communications FleetNet
Of 32 talkgroups catalogued for Contra Costa County, 1 is encrypted and 31 remain in the clear. A scanner can still receive the unencrypted channels.
3 of 9 records here have been checked against a primary source; 6 have not.
System and talkgroup counts come from this site's agency database and change without notice — confirm current status on RadioReference.
Encryption Technology Used in Contra Costa County
Encrypted Agencies in Contra Costa County
| Agency Name | Type | Encryption | Scope |
|---|---|---|---|
| Antioch Police | Police | P25 AES-256 | Partially Encrypted |
| Brentwood Police | Police | P25 AES-256 | Partially Encrypted |
| Concord Police ✓ | Police | P25 AES-256 | Fully Encrypted |
| Contra Costa County Sheriff | Sheriff | P25 AES-256 | Tactical Only |
| Hercules Police | Police | P25 AES-256 | Tactical Only |
| Martinez Police ✓ | Police | P25 AES-256 | Fully Encrypted |
| Pinole Police | Police | P25 AES-256 | Tactical Only |
| Richmond Police | Police | P25 AES-256 | Tactical Only |
| San Ramon Police ✓ | Police | P25 AES-256 | Fully Encrypted |
Related Case Studies
Learn more about police radio encryption issues in California.
Frequently Asked Questions
Is Contra Costa County police radio encrypted?
3 of 9 agencies in Contra Costa County, California are fully encrypted (33%), while 6 have partial encryption.
Can I listen to Contra Costa County Sheriff on a scanner?
The Contra Costa County Sheriff's Office has encrypted their radio communications using P25 AES-256. Scanner monitoring of sheriff operations is no longer possible.
How many police departments in Contra Costa County are encrypted?
8 police departments in Contra Costa County have implemented some level of encryption, along with 1 sheriff offices, 0 fire departments, and 0 EMS agencies.
What encryption technology does Contra Costa County use?
The most common encryption type in Contra Costa County is P25 AES-256, used by agencies for secure communications. This encryption blocks public scanner monitoring.
Fight Encryption in Contra Costa County
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