Cal. Welf. & Inst. Code § 18927.5

(a) A county human services agency shall notify the department when a mass overissuance has been identified, and include information in the notification as to whether the mass overissuance is known to have been caused by either of the following:
1. (1) Negligence or fraud on the part of the county human services agency in the certification of applicant households, as defined by subdivision (h) of Section 2020 of Title 7 of the United States Code.
2. (2) A major systemic error by the state or county human services agency, as defined by paragraph (5) of subdivision (b) of Section 2022 of Title 7 of the United States Code.
(b) For purposes of this section, “mass overissuance” means an overissuance that is caused by the same action or inaction and impacts either 8 percent of the county CalFresh caseload, or more than 1,000 CalFresh households within the county, whichever is greater.
(c) The department shall report mass overissuances to the United States Department of Agriculture, Food and Nutrition Service, as required by federal law and guidance.