Cal. Health & Safety Code § 120350

The county health officer of each county shall organize and maintain a program to make immunizations available to all persons required by Chapter 1 (commencing with Section 120325, but excluding Section 120380) and required by Sections 120400, 120405, 120410, and 120415 to be immunized. The county health officer shall also determine how the cost of the program is to be recovered. To the extent that the cost to the county is in excess of that sum recovered from persons immunized, the cost shall be paid by the county in the same manner as other expenses of the county are paid.