Regulator-posted notice

Breach notice filed by County of Contra Costa, California (May 2023)

Organization named: County of Contra Costa, California Provisional: identity as filed, not yet matched to the directory

What the sources say

California Attorney General data security breach list Primary notice

Posted on the California Attorney General data security breach list with a submission date of May 11, 2023.

Organization as reported: County of Contra Costa, California
Incident dates as reported: Sept. 19, 2022 to Sept. 20, 2022
Submission date: May 11, 2023
Observed by BreachRecords: 2026-10-19 05:03 UTC (revision 51181, nid:566621)
Archived copy: Held in the private archive (provenance)

The listing records a filing with the agency; it is not a finding by the agency.

Figures, per source

The linked sources report no figure for this record.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

2023-05-11Submission date (California Attorney General data security breach list)
2026-10-19Observed by BreachRecords (revision 51181)
2026-11-04Approved by a reviewer

Organizations linked by a reviewer

County of Contra Costa, California Named as the filer Provisional: identity as filed, not yet matched to the directory Linked 2026-11-04, method manual.

Archived evidence

55ebfa3d325fffa097c18563bfd5cfc82f8753c8a4dfd3950f2f54c9b10d46de
text/html, 89,433 bytes, retrieved from California Attorney General data security breach list, 2026-10-19 05:03 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

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