Sierra County

Sierra County notified California AG on Nov 21, 2023 of a data breach, which occurred on Feb 21, 2023. Data exposed: Social Security number, Financial / bank account, Medical / health information, Health insurance, Date of birth, Email address, Biometric data, Phone number, Postal address, Name.

Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization: Sierra County
Source: California AG · source record
Date reported: Nov 21, 2023
Date(s) of breach: Tuesday, February 21, 2023
Residents affected: Not published by this source
Data exposed: Social Security number Financial / bank account Medical / health information Health insurance Date of birth Email address Biometric data Phone number Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Mar 5, 2023, as stated in the letter
"The County became aware of the Incident on March 5, 2023, and took immediate steps to secure its systems."
Days to notice: 261 days from discovery (Mar 5, 2023) to the California record (Nov 21, 2023). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter: 12 months of credit or identity monitoring through Experian
Third party: The letter attributes the incident to a vendor or service provider
First seen by BreachTally: 2026-10-30 15:56 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

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Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.