Cal. Health and Safety Code § 120180

If the health officer of any county having a population of 5,000,000 or more employs personnel as inspectors or investigators in the enforcement of the Communicable Disease Prevention and Control Act (Section 27), who are not otherwise licensed, registered, nor certified by this state, the personnel shall meet any one of the following minimum standards and qualifications: (a) Possess a bachelor’s degree in public health from an institution on the list of accredited colleges of the United States Office of Education. (b) Possess a bachelor’s degree with a minimum of 30 semester units of basic sciences from an institution on the list of accredited colleges of the United States Office of Education; or a statement from an accredited institution that the applicant has successfully completed a minimum of 16 semester units distributed among at least the following fields: public health and administration, epidemiology, public health statistics, public health microbiology, and communicable disease control. (c) Possess a bachelor’s degree from an institution on the list of accredited colleges of the United States Office of Education; and have had at least one year of full-time experience or the equivalent in investigation or inspection work in public health or law enforcement. (d) Be employed as an inspector or investigator in communicable disease prevention and control by a county health department in the State of California, and have passed an official civil service examination therefor prior to the effective date of this section.