CA Health & Safety Code Section 116675

Notwithstanding Sections 116340 and 116500, the department shall, after adequate notification of the local health officer, take action authorized by this chapter against a public water system under the jurisdiction of the local health officer if any of the following occur:

(a)

The public water system has been in violation of any provision of this chapter or the regulations adopted hereunder, including any violation of compliance with drinking water standards or waterworks standards, for a period of at least 90 days within the previous year.

(b)

A contaminant is present in, or likely to enter, a public water system and presents an imminent and substantial danger to the health of the users of the system.