Department of Toxic Substances Control

Department of Toxic Substances Control notified California AG on Mar 23, 2023 of a data breach, which occurred on Mar 10, 2023. Data exposed: Social Security number, Medical / health information, Email address, Phone number, Postal address, Name.

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

Organization: Department of Toxic Substances Control
Source: California AG · source record
Date reported: Mar 23, 2023
Date(s) of breach: Friday, March 10, 2023
Residents affected: Not published by this source
Data exposed: Social Security number Medical / health information Email address Phone number Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Mar 10, 2023, as stated in the letter
"What Happened On Friday, March 10, 2023, DTSC's security team discovered a DTSC e-mail account that was compromised and found that a threat-attacker briefly gained unauthorized access to the e-mail account."
Days to notice: 13 days from discovery (Mar 10, 2023) to the California record (Mar 23, 2023). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
First seen by BreachTally: 2026-10-30 16:00 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.